ARIZONA WATER COMMISSION

BULLETIN 7

ANNUAL REPORT ON GROUND

WATER IN ARIZONA

SPRING 1972 TO SPRING 1973

PREPARED UNDER THE DIRECTION OF H. M. BABCOCK, DISTRICT CHIEF OF THE

U. S. GEOLOGICAL SURVEY IN ARIZONA

PREPARED BY THE GEOLOGICAL SURVEY UNITED STATES DEPARTMENT OF THE INTERIOR

PHOENIX, ARIZONA APRIL 1974

CONTENTS

Introduction ................................ . Scope of the Federal-State cooperative ground-water

program ............................. . Collection of basic hydrologic data ........... . Comprehensive areal ground-water investigations . Research and other programs ....... .

Programs in cooperation with other agencies. Current publications of the Arizona district ..

Summary of ground -water conditions .. Basin and Range lowlands province Central highlands province. Plateau uplands province

References cited .......... .

ILL USTRA TIONS

[Plates are in pocket]

Plates 1-3. Maps showing:

Page

1

2 2 5 5 5 6 8 8

11 11 12

1. Geohydrologic framework in the Sacramento and Hualapai Valleys.

2. Depth to water and hydrographs of water levels in observation wells in the Sacramento and Hualapai Valleys.

3. Chemical quality of the ground water in the Sacra­mento and Hualapai Valleys.

Figure 1. Map showing areas for which ground-water data are given .

Page

3 III

IV CONTENTS

Page

Figure 2. Diagram of well-numbering system in Arizona. . 4

3. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the southeast part of the Basin and Range lowlands province ... 0 • • • • • 13

4. Graphs showing depth to water in selected wells and estimated annual pumpage in the Duncan and Safford basins ............. 0 •• 0 • • 14

5. Graphs showing depth to water in selected wells and estimated annual pumpage in San S i m 0 n basin ......... , .............. , . . . . 16

6. Graphs showing depth to water in selected wells in Willcox basin and Aravaipa Valley and esti-mated annual pumpage in Willcox basin . . . . . . 18

7. Graphs showing depth to water in selected wells and est i mat e dan n u a 1 pumpage in Douglas basin .............. 0 • • • • • • • • • • • • • • 20

8. Graphs showing depth to water in selected wells and estimated annual pumpage in the San Pedro River valley ............. , . . . . . . . . . . 21

9, Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the south-central part of the Basin and Range lowland s provinc e . . . . . . . , . 23

10. Graphs showing depth to water in selected wells and estimated annual pumpage in the upper Santa Cruz basin. , ......... , .... 0 • , • • • • • • 24

11. Graphs showing depth to water in selected wells in Altar and Avra Valleys and estimated annual pumpage in Avra Valley . , ...... , . . . 25

12. Graphs showing cumulative average change in water level by areas and estimated annual pump-age in the lower Santa Cruz basin ...... , 0 • • 27

CONTENTS

Figure 13. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the central part of the Basin

v

Page

and Range lowlands province . . . . . . . . . . . . . 28

14. Graphs showing depth to water in selected wells in the Salt River Valley . . . . . . . . . . . . . . . . 29

15. Graphs showing cumulative average change in water level in the Queen Creek-Higley-Gilbert, Tempe- Mesa-Chandler, and Phoenix-Glendale-Tolleson areas of the Salt River Valley . . . . 30

16. Graphs showing cumulative average change in water level in the Litchfield-Beardsley-Marinette and Liberty - Buckeye - Hassayampa areas and estimated ann u a 1 pumpage in the Salt R i v e r Valley. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

17. Graphs showing depth to water in selected wells and estimated annual pumpage in the Waterman Wash area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

18. Graphs showing depth to water in selected wells and estimated annual pumpage in the Gila Bend basin . . . . . . • . ............. :~\ . . . . . . 33

19. Map showing potential well production, d,epth to water, 1973, and change in water level, 1968-73, in selected wells in the southwest part of the Basin and Range lowlands province . . . . . . . . . . . . . 34

20. Graphs showing depth to water in selected wells and estimated annual pumpage in the Harquahala Plains area. . . . . . . . . . . . . . . . . . . . . . . . . 35

21. Graphs showing depth to water in selected wells and estimated annual pumpage in McMullen Valley. 36

22. Graphs showing depth to water in selected wells and estimated annual pumpage in the Gila River drainage from Painted Rock Dam to Texas Hill and in the Ranegras Plain area. . . . . . . . . . . . 37

VI CONTENTS

Page

Figure 23. Graphs showing depth to water in selected wells and est i mat e d annual pumpage in the Yuma area .......... .

24. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the northwest part of the

38

Basin and Range lowlands province. . . . . . . . . 39

25. Graphs showing depth to water in selected wells in the northwest part of the Basin and Range lowlands province and estimated annual pumpage in Huala-pai and Sacramento Valleys. . . . . . . . 40

26. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the west part of the Central highlands province and the south-central part of the Plateau uplands province . . . . . . . . . . . . . 41

27. Graphs showing depth to water in selected wells and estimated annual pumpage in several areas in the Central highlands province .. . . . . . . . . . . . . 42

28. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the east part of the Central highlands province and the southeast part of the Plateau uplands province .... 0 • • • • • • • • • • • 43

29. Graphs showing depth to water in selected wells in several areas in the Plateau uplands prov-ince ....... 0 ••••

30. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the north-central part of the

44

Plateau uplands province ....... 0 • 0 •••• 0 • 45

31. Map showing potential well production, depth to water, 1973, and change in water level, 1968-73, in selected wells in the northeast part of the Plateau uplands province .... 0 • 0 • • • • • • • • • 46

. CONTENTS VII

TABLE

Page

Table 1. Estimated ground-water p u m p age in Arizona, by areas .......... . 9

ANNUAL REPORT ON GROUND WATER IN ARIZONA, SPRING 1972 TO SPRING 1973

Prepared under the direction of H. M. Babcock, District Chief of the U. S. Geological Survey in Arizona

INTRODUCTION

In Arizona the availability of adequate and potable water sup­plies has a great influence on the location of cities and agricultural areas and on the location and type of industrial enterprises. Agricul­ture is dependent almost entirely on irrigation because rainfall is inade­quate for raising crops. Some surface water is available in a few areas, but the amount is not sufficient to meet the continually increasing de­mand. For many years, nearly two-thirds of Arizona1s water supply has been withdrawn from the ground-water reservoirs; the principal use of the ground water is for the irrigation of crops, although municipal and industrial uses are increasing steadily. A comprehensive knowl­edge of the natural behavior of the components of the ground-water system and of the effects of pumping large amounts of water is neces­sary for proper management of this valuable resource.

Since 1939, a planned program of ground-water studies has been conducted by the U. S. Geological Survey in cooperation with the State of Arizona. The State is represented by the Arizona Water Com­mis sion, and the program is under the immediate supervision of H. M. Babcock, district chief of the U. S. Geological Survey in Arizona. The program includes the collection and analysis of the geologic and hydro­logic data necessary to evaluate the ground-water resources of the State.

This report is a result of the cooperative ground-water pro­gram and contains graphs showing water levels in selected wells and estimated annual ground-water pumpage in most of the developed areas in the State. The report also includes maps showing: (1) hydrologic conditions in Sacramento and Hualapai Valleys (pIs. 1, 2, and 3), (2) potential well production by areas, (3) depth to water in selected wells in spring 1973, and (4) change in water levels in selected wells from 1968 to 1973. In areas where ground-water development has taken placethe potential well-production values are based on the actual meas­ured pro d u c t ion of existing wells. In other areas the potential

1

2

well-production values are based on the extrapolation of the known pro­duction of a few wells that penetrate the several water-bearing units and on the inferred hydrologic characteristics of the units. Figure 1 shows the areas for which ground-water data are given, and the well-numbering system used in Arizona is explained and illustrated in figure 2.

For this report, metric units are given in parentheses follow­ing English units in the text, and English and metric units are shown on the illustrations. The following factors may be applied to convert English units to metric units.

Multiply English units

feet (ft) miles (mi) gallons per minute (gpm) acre-feet (ac -ft) acres (ac)

By

O. 3048 1. 609

3. 785 -3 1. 233 x 10 .4047

To obtain metric units

meters (m) kilometers (km) liters per minute (11m) cubic hectometers (hm3) hectares (ha)

Scope of the Federal-State Cooperative Ground- Water Program

The Federal-State cooperative ground-water program in Ari­zona consists of three major parts: (1) the collection of basic hydro­logic data under the statewide ground-water survey; (2) comprehensive ground -water investigations in selected areas; and (3) research and other programs related to specific hydrologic problems. The three parts of the program are related closely and to alar ge extent are inter­dependent.

Collection of basic hydrologic datao - -The statewide ground­water program provides for the collection of data that give a historical record of the results of ground-water withdrawal and the basic hydro­logic and geologic data that are necessary to evaluate the ground -water resources of the State. The work includes well inventories, periodic water-level measurements~ collection of water samples for chemical analysis, and collection and cataloging of drill cuttings from wells. Water levels are measured in about 880 wells, and the discharge is measured at several hundred wells each year. Water samples from selected wells are collected annually for chemical analysis o The re­sults of the work are available in the files of the U. S. Geological Survey or are published in the" Annual report on ground water in Arizona" and in reports on individual areas.

113" .J11" 110"

F

'\ it I

I", ",

'-, 3··f ... '~. 1Ft: l IF! Y'1 .-+-----~

1: I

.......

-....... ,i'

I I

\ .. I I _Iii

.i .. ~ ,~,~~ IA H A, X,:!,-~

'20 /.~.~' \~ j 4 I ""'md i 11 -. ~ y, .,.-_. '\

"'11 IIF 1 I

M t~S:':~'Ll'\l\I ~~~~'-3-~~ L .. · .. · 5 .... I '. '0' .

\7-';' T-~-~ \C o-<;t-f(j$ .... , ,\ "...E ", I

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" \ 1" 6 .' I I.... " ........

I' ___ ~ c:'S:: _/-

-' '/'" t'"ij,-__ ~-.-L,_ /- -e,{ !I, I>,

... ........:..; ... __ J. $).JtffA ..... 1 _ _, --:<:'-

-..y· ......... < .. ',~a~'_

'-,

MllE~

FIGURE 1. ·-AREAS FOR WHICH GROUND-WATER DATA ARE GIVEN.

1. 2. 3. 4. 5. 6. 7. 8. 9.

10.

EXPLANATION

BASIN AND RANGE LOWLANDS PROVINCE

Ground water mostly from alluvial deposits; small amounts from fractures in consolidated rocks

DUNCAN BASIN 11. LOWER SANTA CRUZ BASIN 18. RANEGRAS PLAIN AREA SAFFORD BASIN 12. SALT RIVER V ALLEY 19. WELLTON-MOHAWK AREA SAN SIMON BASIN 13. WATERMAN WASH AREA 20. YUMA AREA ARA V AlP A V ALLEY 14. GILA BEND BASIN 21. COLORADO RIVER FLOOD WILLCOX BASIN 15. HARQUAHALA PLAINS AREA PLAIN FROM DAVIS DAM DOUGLAS BASIN 16. ~MULLEN VALLEY TO IMPERIAL DAM SAN PEDRO RIVER V ALLEY 17. GILA RIVER DRAINAGE 22. BIG SANDY V ALLEY UPPER SANTA CRUZ BASIN FROM PAINTED ROCK DAM 23. SACRAMENTO V ALLEY ALTAR VALLEY TO TEXAS HILL 24. HUALAPAI VALLEY AVRA VALLEY

CENTRAL HIGHLANDS PROVINCE

Ground water from alluvial deposits in a few small valleys and from fractures and joints in consolidated rocks; many springs issue from fractUres

25. BIG CHINO V ALLEY 27. WILLIAMSON VALLEY 26. LITTLE CHINO VALLEY 28. VERDE V ALLEY

PLATEAU UPLANDS PROVINCE

Ground water mostly from fine-grained sandstone units in consolidated rocks; siltstone and claystone layers act as aquicludesi moderate amounts of ground water from narrow alluvial deposits

I ALLUVIAL DEPOSITS

AREA BOUNDARIES NOT DEFINED BY CONTACT BETWEEN ALLUVIAL DEPOSITS AND CONSOLIDATED ROCKS

[-~

CONSOLIDATED ROCKS

Figure 13

GROUND-WATER DATA FOR AREA OUTLINED SHOWN ON INDICATED FIGURE; HACHURES INDICATE MAP OVERLAP AREA

FIGURE 1. --AREAS FOR WHICH GROUND-WATER DATA ARE GIVEN o

\JJ

4

B A

T. , H.

GILA AND SALT RIVEA BASE LINE

C

Iff J w. T'U£ 2 , • , , Z • « e 2 a: "' :IE a: , "' > 0 ii

I T ..., . I;~ ...J

« '" / II VU

. o ' z «

II V « T.

...J • C; s.

l" Well (0-4-5)19coo

R.5 E.

6 5 -4 3 2

7 8 9 10 11 12

T. 18 17 16 15 14 13 4 J---j~,,--+-+-+~ S . ." 20 21 22 23 24

30 29 28 27 26 25

31 32 33 34 35 36

R"

The well numbers used by the Geological Survey in Arizona are in accordance with the Bureau of Land Management's system of land sub­division. The land survey in Arizona is based on the Gila and Salt River meridian and base line, which divide the State into four quadrants. These quadrants are designated counterclockwise by the capital letters A, B, C, and D. All land north and east of the point of origin is inA quadrant, that north and west in B quadrant, that south and west in C quadrant, and that south and east in D quadrant. The first digit of a well number indicates the township, the second the range, and the third the section in which the well is situated. The lowercase letters a, b, c, and d after the section number indicate the well location within the section. The first letter de­notes a particular 160-acre (64. 8-hectare) tract, the second the 40-acre (16. 2-hectare) tract, and the third the la-acre (4. a-hectare) tract. These letters also are assigned in a counterclockwise direction, beginning in the northeast quarter. If the location is known within the la-acre (4. 0-hectare)tract, three lowercase letters are shown in the well number. In the example shown, well number (D-4-5)19caa designates the well as being intheNEtNEtSWt sec. 19, T. 4 S., R. 5 E. Wheremorethanonewell is within a la-acre (4. a-hectare) tract, consecutive numbers beginning with 1 are added as suffixes.

FIGURE 2. --WELL-NUMBERING SYSTEM IN ARIZONA.

5

Individual areas for which studies currently are in progress include the lower Hassayampa area and the Dateland-Hyder area. The reports that result from these studies will be published in the Arizona Water Commission bulletin series, and copies will be available to the public.

Comprehensive areal ground - water investigations. - -Areal studies are undertaken to develop more detailed information and an understanding of the ground-water system in areas where conditions are critical owing to overdevelopment of the water supply, in areas where development of the water supply is beginning, or in areas where there is some special problem or interest. Four areal studies presently are in various stages of completion under the Federal-State ground­w~ter cooperative program: (1) Water resources of southern Coconino County; (2) Water resources of the Big Sandy area; (3) Effects of ground­water withdrawals and strip mining on the hydrology of the Black Mesa area; and (4) Ground-water resources in southern Navajo County.

Comprehensive areal investigations conducted in cooperation with other agencies also benefit the State of Arizona. Two studies in the lower Colorado River region were completed recently-(1) a study of the ground-water resources and (2) a studyof the quality of the ground water. Studies currently are in progress in the Safford basin, Lake Mead area, and in the Navajo and Hopi Indian Reservations.

Research and other programs. - -The research programs of the U. S. Geological Survey in Arizona are directed toward developing a broader understanding of the hydrology of arid and semiarid lands. Other programs apply geology and hydrology to engineering and the pub­lic welfare. Current programs are the Tucson-Phoenix urban pilot and the companion Resource and Land Information (RALI) studies. The in­vestigation of ground-water return flows to the lower Colorado River includes applied research in instrumentation and techniques in ground­water measurements.

Programs in Cooperation with Other Agencies

In 1972-73 ground-water studies were being conducted in coop­eration with the following agencies:

City of Flagstaff City of Tuc son International Boundary and Water Commission

6

Navajo Tribal Council Navajo Tribal Utility Authority Salt River Valley Water Users! Association University of Arizona U. S. Bureau of Indian Affairs U. S. Bureau of Reclamation U. S. National Park Service

Current Publications of the Arizona District

The following reports on the water resources and geology of Arizona were published or released to the open file from July 1. 1972. through June 30. 1973.

Geology and ground-water system in the Gila River Phreatophyte Proj­ect area. Graham County. Arizona. by W. G. Weist. Jr.: U. S. Geol. Survey Prof. Paper 655-D. 1971. 22 p .• 3 pIs •• 10 figs .• 2 tables.

Applications of remote sensing in Arizona State Government. by C. C. Winikka and H. H. Schumann. in Eighth international sympo­sium proceedings on remote sensing of environment. volume 1: Ann Arbor. Michigan Environmental Research Inst •• 1972. p. 3-5.

Bibliography of U. S. Geological Survey water-resources reports for Arizona. May 1965 through June 1971. compiled under the di­rection of H. M. Babcock: Arizona Water Comm. Bull. 2. Sep­tember 1972. 60 p.

Changing the consumptive use on the Gila River flood plain. south­eastern Arizona. by R. L. Hanson. F. P. Kipple. and R. C. Culler. in Age of changing priorities for land and water: Am. Soc. Civil Engineers. Irrig. and Drainage Specialty Conf .• Spokane. September 26-28. 1972. p. 309-330.7 figs .• 1 table.

Channel changes of the Gila River in Safford Valley. Arizona. 1846-1970. by D. E. Burkham: U. S. Geol. Survey Prof. Paper 655-G. 1972. 24 p .• 5 pIs .• 9 figs .• 3 tables.

Chemical quality of the water in the Tucson basin. Arizona. by R. L. Laney: U. S. Geol. Survey Water-Supply Paper 1939-D. 1972. 46 p .• 5 pIs .• 5 figs .• 6 tables.

7

Electrical-analog analysis of the hydrologic systeml Tucson basinl southeastern Arizonal by T. W. Anderson: U. S. GeoL Survey Water-Supply Paper 1939-C I 1972. 34 p. I 6 pIs. I 8 figs. I 1 table.

Hydrologic regimen of lower Tonto Creek basinl Gila CountYI Arizona­a reconnaissance studYI by H.H. Schumann and B. W. Thomsen: Arizona Water Comm. Bull. 3 1 November 1972. 39 p. I 14 figs. I 1 table.

Investigation of floods from small drainage basins in Arizonal by B. N. Aldridgel in Twenty-first annual Arizona conference on roads and streetS proceedings: Arizona Univ. I Arizona Transp. and Traffic Inst. I 1972. p. 107-1261 12 figs.

Water resources data for Arizonal 1971-Part 1. Surface water rec'; ords l by U. S. Geological Survey: U. S. Geol. Survey open-file reportl 1972. 253 p. I 4 figs.

Annual report on ground water in Arizonal spring 1971 to spring 1972 1 prepared under the direction of H. M. Babcock: Arizona Water Comm. Bull. 51 June 1973. 48 p. I 32 figs. I 1 table.

Evaluating the reliability of specific-yield determinationsl by R. L. Hanson: U.S. Geol. Survey Jour. Researchl v. 11 no. 3 1 1973. p. 371-376 1 5 figs. I 2 tables.

Geohydrology of the Needles areal Arizonal Californial and N evada l by D. G. Metzger and O. J. Loeltz: U. S. Geol. Survey Prof. Paper 486-J I 1973. 54 p. I 3 pIs. I 25 figs. I 11 tables.

Hydrologic conditions in the SanPedro RivervalleYI Arizona'l 1971 1 by R. H. Roeske and W. L. Werrell: Arizona Water Comm. Bull. 4, March 1973. 76 p. I 2 pIs., 5 figs. I 5 tables.

Monitoring of streamflow in the Verde River by ERTS-l Data Collection System (DCSL by H. H. Schumannl in Symposium on signifi­cant results obtained from the Earth Resources Technology Satellite-i-volume 1: Technical Presentationsl section AI S. C.Fredenl E. P. Mercantil and M. A. Becker, eds.: Natl. Aeronautics and Space Adm. SP-3271 1973. p. 769-776 1 3 figs.

8

Roughness coefficients for s t rea m channels in Arizona, by B. N. Aldridge and J. M. Garrett: U. S. Geol. Survey open-file re­port, 1973. 87 p., 4 figs., 7 tables.

Water resources data for Arizona, 1970-Part 2. Water quality rec­ords, by U. S. Geological Survey: U. S. Geol. Survey open­file report, 1973. 146 p., 2 figs., 4 tables.

SUMMARY OF GROUND-WATER CONDITIONS

Nearly two-thirds of Arizona's water supply comes from the ground -water reservoirs. Although municipal and industrial uses are increasing, the greatest use is for the irrigation of crops. For the 20th consecutive year, the withdrawal of ground water exceeded 4 million acre-feet (about 5,000 cubic hectometers); inthree of the years-1961, 1967, and 1971-the withdrawal of ground water exceeded 5 million acre-feet (about 6,000 cubic hectometers). In 1972 the withdrawal of ground water was nearly 5 million acre-feet (about 6, 000 cubic hecto­meters); through 1972, nearly 144 million acre-feet (about 178, 000 cu­bic hectometers) of ground water has been withdrawnfrom the ground­water reservoirs in Arizona. Table 1 shows the amount of water pumped in each of the major developed areas in 1972 and the accumulated total since the beginning of record.

Ground water occurs under different conditions in each of the three water provinces in Arizona {fig. I)-the Basin and Range lowlands province, the Central highlands province, and the Plateau uplands prov­ince. The use of ground water and the effects of this use on the ground­water reservoirs in each of the three provinces are discussed separately in the following sections.

Basin and Range Lowlands Province

The Basin and Range lowlands province (fig. 1) is the most highly developed of the three water provinces. Although the province covers only about 45 percent of the State, it contains more than 90 per­cent of the cultivated land and more than 80 percent of the population. In most of the province large amounts of ground water are pumped each year, and water levels are declining.

9

Table 1. - -Estimated ground-water pumpage in Arizona, by areas

[Numbers rounded to nearest thousand acre-feet. Area: See figure 1 for location. Other areas: Aravaipa Valley, Big Sandy Valley, Date Creek area, Peeples Valley, Skull Valley, Verde Valley, Little Colo­rado River basin, areas in the Plateau uplands, and small areas not identifiable with any particular basin]

Area

Duncan basin. . . Safford basin. . . San Simon basin. Willcox basin. Douglas basin ...

San Pedro River valley. Upper Santa Cruz basin. Avra Valley ......... Lower Santa Cruz basin. Salt River Valley ...

Waterman Wash area Gila Bend basin .... Harquahala Plains area. McMullen Valley ..... Gila River drainage from Painted

Rock Dam to Texas Hill .

Ranegras Plain area .. Wellton-Mohawk area. Yuma area '}j ....... Colorado River flood plain from

Davis Dam to Imperial Dam Sacramento Valley ..........

See footnotes at end of table.

Pumpage, in thousands of acre-f~et

1972

25 130 104 292

89

91 253 146 798

1, 800

57 238 108 112

125

19

'5:../ 201 257

19 6

Accumulated total through 1972

668 3,088 1,503 4,374 1, 752

];../547 6,404 2,910

34,662 66,981

I, 005 4, 114 2,343 I, 310

1,492

291 3,322 3, 794

191 38

10

Table 1. --Estimated ground-water pumpage in Arizona, by areas-Continued

Pumpage, in thousands of acre-feet

Area

Hualapai Valley ... Big Chino Valley . . Little Chino Valley. Williamson Valley Other areas.

Total.

1972

4 8

12 2

100

i/4,996

Accumulated total through 1972

34 393 385

46 2,215

i/143, 862

1./ Pumpage for San Pedro River valley was not computed prior to 1966. Thus, accumulated total is for 1966-72 only. Estimated pump­age before 1966 is included under other areas.

3..1 Withdrawal for drainage purposes only.

:if Yuma area includes South Gila Valley, Yuma Mesa, and Yuma Valley. Beginning in 1947in Yuma Valley and in 1961in South Gila Val­ley, part of the pumpage was for drainage of waterlogged lands.

if The number of significant figures in total pumpage is the re­sult of small increments in the early years when ground -water pumpage was small and is not intended to imply that the data are accurate to the extent indicated.

11

The Salt River Valley and the lower Santa Cruz basin are the largest agricultural areas in the State. Through 1972, nearly 67 mil­lion acre-feet (about 83,000 cubic hectometers) of ground water had been withdrawn in the Salt River Valley, and nearly 35 million acre-feet (about 43, 000 cubic hectometers) had been withdrawn in the lower Santa Cruz basin. In the last few years the amount of ground water pumped in these areas has been somewhat less than that pumped in the middle 1950 1s and early 1960 1s, and the rates of water-level decline have de­creased accordingly; however, the decline rates remain the largest in the province. Other areas in the Basin and Range lowlands province where ground-water withdrawals have caused large water-level declines are the Willcox basin, San Simon basin, upper Santa Cruz basin, Avra Valley, Gila Bend basin, Harquahala Plains, and McMullen Valley.

Figures 3, 9, 13, 19, and 24 show the depth to water in spring· 1973 and the change in water levels from 1968 to 1973 in selected wells in the Basin and Range lowlands province. Graphs (figs. 4, 5, 6, 7, 8, 10, 11, 14, 17, 18, 20, 21, 22, 23, and 25) showing the depth to water in selected wells and estimated annual pumpage are included for most areas in the province. Graphs showing the cumulative average change in water levels for areas in the lower Santa Cruz basin and the Salt River Valley and estimated annual pumpage are given in figures 12, 15, and 16.

Central Highlands Province

The Central highlands province is the smallest of the three water provinces; only a few thousand acres of land is under cultivation, and ground-water pumpage is small. Chino and Verde Valleys are the main areas under cultivation, and some surface water is available for irrigation. The small amount of ground-water withdrawal has not re­sulted in any notable declines except in parts of Chino Valley, where a decline of a few feet per year has been measured in the artesian aquifer.

Figures 26 and 28 show the depth to water in spring 1973 and the change in water levels from 1968 to 1973 in selected wells in the area. Graphs showing depth to water in selected wells and estimated annual pumpage in several areas in the province are given in figure 27 .

Plateau Uplands Province

In the Plateau uplands province ground-water development is small compared to that in the Basin and Range lowlands province, but

12

it is somewhat greater than that in the Central highlands province. The use of ground water is largely confined to scattered farms and home­sites; only about 35, 000 acres (about 14,000 hectares) of land is under cultivation. In a few population centers, such as Flagstaff, Holbrook, and the White Mountains recreational areas, ground water is the main source of supply. The Navajo and Hopi Indian Reservations make up a large part of the province.

Figures 26, 28, and 30 show the depth to water in spring 1973 and the change in water levels from 1968 to 1973 in selected wells in the province; figure 31 shows depth to water in spring 1973. Graphs showing water levels in selected wells are given in figure 29.

REFERENCES CITED

Gillespie, J. B., and Bentley, C. B., 1971, Geohydrology of Hualapai and Sacramento Valleys, Mohave County, Arizona: U. S. Geol. Survey Water-Supply Paper 1899-H, 37 p.

Twenter, F. R., 1962, Geology and promising areas for ground-water development in the Hualapai Indian Reservation, Arizona: U. S. Geol. Survey Water-Supply Paper 1576-A, 38 p.

POTl:NTlAl. Wl"LL P[,ODUC'T\O;", l~ GALLO~'

, ~ ,

! I

FIGURE 3. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE SOUTHEAST PART OF THE BASIN AND RANGE LOWLANDS PROVrnCE.

13

14 M

o

'Of-100)-

oo\-

{D_S_n)32, DOMESTIC AND STOCK WELL. DEPTH 110 Fl' (34 M),

WATER-TABLE AQUIFER, ABOUT 0.1 MILE: (0,2 KM) FROM

DIVERSION CANAL; DUNCAN BASIN

(0-7-31)4. IRRIGATION WELL, DEPTH 75 FT (23 M),

WATER-TABLE AQUIFER. ABOUT 0.1 MlLE (0.2 KM) FROM

GILA RlVER; DUNCAN BASIN

(D-B-2m3, lRRlGATlDN WELl., OE:prn 400 1"I 1122 Ml.

~ ARTESIAN AQUIFER, ARTESIA AREA;

~ 32

~

IOO\--

110 I-

0

0

0

0

0

0

0

0

0

1950

(0-6-26)]1. IRRIGATION WELL, DEPTH 540 1"1' (155 M).

WATER-TABLE AQUIFER, ON BANK OF DIVERSION CANAL;

\ \ \

\ V V

(D-7-27)2, IRRIGATION WELL, DE:Pl1{ UNKNOWN.

ARTESIAN AQUIFER. ON BANK OF DIVERSION CANAL:

SAFFORD BASIN

/

1951 1952 1953 1954 1955j19Sij 11951 1958\1959

----..--1 "- / A II' " 1/

/11 V II I I"

\ ..-II

19£0 1961 1962 1963 1964 tass 1966 1961 1966 1969 1970 1911 19n 1973

FIGURE 4. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED.ANNUAL PUMPAGE IN THE DUNCAN AND SAFFORD BASINS. (IN TWO SHEETS.) SHEET 1 OF FIGURE 4.

110-

180-

170~

180-

HMJ 1(1

::~ :: 40 30

'" " '" o 0

(D-6-24)5. IRRIGATiON WELL, DEPTH 64 FT (20 M).

WATER-TABLE AQUIFER. ABOUT 0.2 Mll..E (0, a KM) FROM

DIVERSION CANAL, SAFFORD BASIN

-

(0..4_22)13. mRlGATION WELL, DEPTII100 FT (ao M),

WATER_TABLE AQUIFER, SAFFORD BASIN

PUMPAGB, DUNCAN BASIN

PUMPAGE., SAFFORD :BASIN

FIGURE 4. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE DUNCAN AND SAFFORD BASINS. (IN TWO SHEETS. ) SHEET 2 OF FIGURE 4.

15

16

140f-­ISO r-

0

0

0

0

01-

01-

0

(0.18,32)26. IRRIGATION WELL, DEPTIl 1000 FT (305M),

WATER-TABLE AQUIFER

I 1 I I I J ~ 1 1

1 1 1 I I I 1 I (0-18-32)11. SroCK WELL, DEPTH UNKNOWN,

WATER· TABLE AQUIFER

t-- I--

:: ~ "i--4---+---+-+-+-.......... -+-t--+--t-=''-"'"kc,,-+--+---+--+--+--+--t--f----t----t----r---t--t-

'--

0

I I J ~ ~ 1 1 -I 0

1 1 1 I I I ~ I ........... 0

V ~ i/" '" I- (0-13.31))24. IRRIGATION WEL4 DEPnt 120 FI (37 M).

I- WATER.TAELEAQUlFER

0

~FLOWING~

0 \ 7 =, \1/ 1'--..

0 ~ t--

0

0 t--t-

~

I- (D-13-29)H, DOMESTIC AND SroCK WELL, DEPrn 802 FT 1---r--I- (ut Ml ARTESIAN AquiFER

:::l ~~~ I- ,~,,-,.,~,. IR}IMW~ WELL! DEP} "',,} "" M:. 116 380 I--- WATER_TABLEAQUlFER

---I~I-I-I-I-I-I-I------- 1965 1966 1967 196B 1969 1S70 1911 1972

HOTEl BlANK SPACES lNDlCATE NO MEASUREloIENT MADE

FIGURE 5. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN SAN SIMON BASIN. (IN TWO SHEETS. ) SHEET 1 OF FIGURE 5.

330 r- (0-12-28)33. 1IllHGATlON WCLL, DEFTI! 550 .FT (loa 1>Il.

340 f--- ARTI':SLAN AQUIFER

210 r-2BOf---

(D-12-28)1.5, DOMESTIC WELL, DEPTH 1000 .I'T (305 M),

1"-.

1"-..

---

t;OTJ:: BLANK SPACI':S INnICATr:: NO MCA5UI\ElIENT J>,lADE

FIGURE 5, - -DEPTH TO WATER IN SELECTED WELLS AND ESTI­MA TED ANNUAL PUMP AGE IN SAN SIMON BASIN. (IN TWO SHEETS. ) SHEET 2 OF FIGURE 5,

17

0

0

......... 0

~ 0

0 1'-.....

0 C'-.,

V f\ 0

'\ 0

......... 0

L'-. 0

0 -"'.. 01- (0-11-25)6. UNUSED ""'ELL, DEPTH 516 FT (151 M). / '\

"'\:t'. y .... Or- WATER-TABLE A~UIFER, WILLCOX BASrn

0

2~O - (D-15-2S)2. UNUSED WELL, DEPrn 700 FT (213 M),.

290 - WA TER- TABLE AQUIFER. V.1LLCOX BASIN

I ::~ '" 24 90 f-- (0-15-24)20. DCJlr.U:STlC WELL, O!:PTII 95 FT (29 MI.

28 90 I-- WATER-TABLE AQUIFER, WILLCOX BASIN

I I I I I I

v

(0-15.25)23. OOMESTIC WELL, DEPTH 250 FT (16 Ml. 1--i--+-+-+--t--+--+-+-t---j--+-+-+--t--+---1 WA n::R_ TABLE AQUIFER. NEAR I\1LLCOX PLAYA;

195011951 1952j1953 1954 1955 1956 1951 1960 1961 1952 1963 1964 1965 1966 1967 196B L969 1970 1971 1972 1973

NOm BLANK SPACES INDICATE NO MEASUREMENT MADE

FIGURE 6. --DEPTH TO WATER IN SELECTED WELLS IN WILLCOX BASIN AND ARAVAIPA VALLEY AND ESTIMATED ANNUAL PUMP­AGE IN WILLCOX BASIN. (IN TVrO SHEETS. ) SHEET 1 OF FIGURE 6.

'~ , " H

" "

0

0

0

0

0

0

(D-14-lb)20, sroCK WELL, DEPTH 200 IT (61 lit),

\\ATER_ TABLEAQUIFEIl, \\lLLCOX nASlN

I I. 1 J 1 1 1

1 1 1 1 1

I I I J 1 1 1

{D-1J-25)30, UNUSED \\ELL, DEPIH UNKr,UWN,

WATER_ TABLE AQUIFEIl, \'>ILLCOX BASIN

r--

-f--

'D-"-',,". ,""GATIDN WBLL. DEPrn '" CO '"' "'.I------+---+--+----+------+------+-----+--+--+-----+-t-I'"----.~_+_+""_I~ WATER_TABLE AQUIFEH, WILLCOX BASIN

(0-10-2])35. SroCK WELL, DEPTH 350 FT (107 M).

WATER_TABLEAQUWER, WILLCOX BASIN

::1 00

'" ~~ __ -L __ ~ __ L-~ __ ~ __ ~ __ +-__ ~~ __ ~ __ ~ __ +--.~-+ __ ~ __ +-__ ~~ __ ~ __ ~ __ +-__ ~~

" 26~3 L-__ FW __ OD_p_u_m_,_AAA __ U_U_~_U_L_LIT __________ ~ __ L-~ __ -L __ J-__ ~~~-L~N~D~~L.~Bu~m~"~~~'~E'~m~D~'~~T=E~ooLO='M='~"=RE="=E'~n='~=D=EL--"

PU"'PAGE, WILLCOX BASIN

FIGURE 6, --DEPTH TO WATER IN SELECTED WELLS IN WILLCOX BASIN AND ARAVAIPA VALLEY AND ESTIMATED ANNUAL PUMP­AGE IN WILLCOX BASIN. (IN TWO SHEETS. ) SHEET 2 OF FIGURE 6.

19

20

0

I I I I I I I I I 1 I I I I I I I

f- (D_lB_26)l6. SroCK WELL, DEPTH UNKNOWN.

I- WATER~ TAELE AQUIFJ:!l

{1)-.19-26)13. IRRIGATION WELL, DEPTH 252 FT (17 M),

WATER-TABLE AQUIFER

-r--

(D_21.26)2, UNUSED lYELL, OEPUi 110 FT (34 M),

WATER-TABLE AQUIFER

1 I

I I

I I

l I

I

I "I

I I

I 1 I I

{Q-.-22_25)14. DOMESTIC AND SroCK WELL,

I

I

DEPTIl UNKNOWN. WATER_TABLE AQUIFER

I I I I I I 1 I I--J I I

(D-12-26)20. lRR!GATIONWELL, DePTH 9() FT

I I

I

"'" --

-r--

FIGURE 7. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN DOUGLAS BASIN.

0 IT

, 0 "-; "- V 1"'-, I-. 0

I \ , 0

, Or (D-24-23)6, STOCK WELL, DEPTH 250 FT (76M).

'I- WATER- TABLE AQUIFER

0

VI'- 1 r:::::-:

1351-

140 r-(0-23_22)18, SroCK Vi"ELL, DEPnI UNKNOWN.

WA TEE_TABLE AQUlFER

l--

IV

{D-18_2t)34. ABANOONED WELL, DEPIlI 560 FI (111 MJ.

50 r- ARTESIAN AQUIFER

I" /

1\ J

(0-9 ... 15)36, OOMESIIC WELL, D)'.;PTI:! 92 FI (28 M),

WATER ... TABLE AQUIFER

f--V "V "- .r- r-.. /'

--

\

- / /

v

---------------------~~­NOTE: BLANK SPACES INDICATE "NO MEASUREMENT MADE

FIGURE 8. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE SAN PEDRO RIVER VALLEY. (IN TWO SHEETS. ) SHEET 1 OF FIGURE 8.

21

22

".

::~

"

(0-8-11)19. DOMESTIC WELL, DEPTH 46 IT (14 M).

WATER-TABLE AQUIFER. ABOUT 0.1 MILE (0,2 KM)

FROM SAN PEDRO RIVER

I" /\

(0_1_11)1, lRRJ{lATION WELL, DEPTH 8S FT (26 M).

WATER-TABLE AQUIFER, ABOUT 0.1 (0.2 KM) MaE

FROM ARAVAIPA CREEK

(0-6-16)8. STOCKWELL, DEPTH 54 FT (16 M).

WATER-TABLE AQUIFER, ABOUT 0.3 MILE (0, 5 KM)

1--./ -........v

HM3 6~oL~-F--------------------------~--L-~---L--J---~--L-~~N~om'~~.RBUU~~~'~AAMC~E,~,mND~,a~tt~OO~MU~'U~RE~M~~~T~,~~rnDE~~ H.

FIGURE 8. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE SAN PEDRO RIVER VALLEY. (IN TWO SHEETS. ) SHEET 2 OF FIGURE 8.

R 2 E,

PUTENTIAL WELL PRODUCTIOr;,

PEl! ~Hr;UTE WPM), UNE GALLUN PEl! MINUTE

I~

20 2~ 3? KILO~1ETERS

FIGURE 9 0 --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE SOUTH-CENTRAL PART OF THE BASIN AND RANGE LOWLANDS PROVINCE.

23

24 M

"~ " .. " ,

"~

· · · · .f--

·

1 1 1 1 1 1 I I T l.:::::J T I AT I I 1 1 ["'---.J......!" l'--..1 J.-

{p...19~16)l5. STOCK \\'ELL, DEPTH 300 FT {91 Ml,

WA TER~ TABLE AQUrFBR, CrENEGA CREEK DRAINAGE

(0-24-15)18. OBSERVATlON WELL, Dt:?TH 47 PI (14 All.

WATER-TABLE AQUIFER. IN SANTA CRUZ RIVER

FLOOD PLAW

-

{0-19_13)5, SroCK WELL, DEPTIl250 FI (76 Ml.

260 _ WATER_TABLEAQUlFER

I T 1 1 r 1 I I '~J I I I 1 1 • 1 1 1 ""'1'--/fV lv-{ J ·

'" 't· " " • f-

{O-17-14)1B. OBSERVATION WELL, DEPTH 124 FT (38 MI •

WATER-TABLE AQUlFt:R. ABOUT O. 5 MILE to. 6 KM)

.f--EAST OF SANTA CRUZ RIVER ·

..-

':1 " " " "

· · · '-' · · .f-.f-

·

n f\- k l\ T '\

'v 'l VV " (0-15-13)2. OBSERVATION WELL, DEPTH 104 FT (32 Ml..

WATER_TABLE AQUIFER. ON EAST BANK OF

SANTA CRUZ RIVER

~ r--... V\ r-.... --1-/ " I

-

- /v'"""' t--. tv I" l-- r--.... 1/

..;-, 1\ "- "-.", IJ\

/\''''< V V \I hi / 1\ "'.

M I"" 1\ A I \ 'I I \JI,. .At. I V

N

"I "'r-~---t--~--~~~~=--+--4---+-~~-+--~--+---~~---+--~--+--,~-+--~--+---~~ :,; :~r-~---t--~--+---r-~------+~--4---+-----~--+---~-+----~~~~~~~--,,-+-~/r--+L--~--+---~~

(0..14.14)10. MUNICIPAL WELL, DEPTH 300 FT (91M). '\ /' 1---"'"

WATER_TABLE AQUIFER

1 r · · · · · · ·

I I T T T T I .I

(0-12-12)22, ffiRIGATJON WELL, DEPTH 315 IT (96 Ml,

WATER-TABLE AQUlFER, ABOUT O. 5 MILE (0.8 KM)

FROM S.4.NTA CRUZ RIVER

I I I I I I J 1 1 1 r 1 --h. 1 I I I 1 I 1 ~

(0-11_14)32, IRRIGATION WELL. DEPTH UNKNOWN. "

WATER_TAllLEAQUIFER. CAtM.IlA DEL ORO DRAInAGE

I -- ~---I-'"

J.--I--V '\ _r-.. / '" / v f\ 7

'\ /

NOn:· BLANK SPACES INDICATE·

FIGURE 10. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE UPPER SANTA CRUZ BASIN.

::~M ::: IT I I 1 1 I 1 102 3]0 {D-21~8)27. ~MESTIIC AND ~TOCK ~LL'D~PllI L---"J,--+-"-...,+-+-_lr_--j---+-+--r_-t--+-+-+-_lr_--j---+--1

340 I 400 FI (In M). WATER-TABLE AQUIFER.

106 lSO

110 360L_ ___________ -L_-'---_L---'_-L_--'--_-'---_'-----'-_-'-_-'-_L---'_-L_--'--_-'---_'-----'

::§ ~~~~-~-~-1-~~~~~==4===t=~=--+--1---~~~~~~~1---t-~--~==~~±===~-1

::,~,:: ... ~~....,L==l EEE3~~~EE3 , ~ i:=)35. UNUSED WELL, DEPUI 295 FI (SO MI.

2~O WATER-TABLE AQUIFER .. AVRA VALLEY

16 250 L_ ________________ -'---_L---'_-L_-"-_-'---_L_---'-__ -L_-'---__ '----'_-L_-"-_-'---~L_---'

\

-(0..15_11)5, OB5ERVATrDN WELL, DEPTIi 712 FI (217M). r_-4--!--+-+-_l---j--+-+--f_-4-_t_--t--+-_lr_-+---j WATER_TABLE AQUIFER. AVRA VALLEY

-I---

... t---j--+-+--t----j--+-+-+---t--4--+~~~t-_lr_-+-+-+--r_-t-_t_-+-t_---j-_1 148 490t---j--+-+--t----j---+-+--+---r_-t-_t_-+-rr-----j~~=t~+-+_--f_-t-_t_-+-t__l-_1 '" ;,. f---L-~J-~-L--'----'--t_l-r--t_+-+_-+-_+-.....,__f'...q;:::::;::of=!=I=t--t_i-l

:::1 ::: 156 510 (0-14_11)2, STOCK WELL, DEPJl{ 582 FI (171 M).

S20 WATER_TABLE AQUIFER. AVRA VALLEY

'". ;,.'-----------------'-----'-----'---'---'---'-----'----'-----'----'-----'-----'---'---'---'-----'--"

\ \'\

\

(0-13-10)16, lRRIGATION WELL, DEPTII ~oo FI (103 M). f_-t--_t_-+-+-_l----j---t---+_--f_-t-_t_--t--t__l----j----j WATER_TABLE AQUIFER. AVRA VALLEY

:::~ ~;; f--t-+-----+---+----+----+-+----+--+---+r--..-+--+-r----+----+-_~___+___+-+----+-_+__+___1 no ". 1---L--1----'-------'--"---L--'----+--I~I___+___+_+___jf__-1--+-r---""F_+_=+___I-I___+___+---1

- --120 (u..13~U)4. OOMESTIC WELL, OEPTII 430 FT (131 M).

400 WATER~TABLEAQUIFER.

124 410~-,---,--,---,__,--~--_r--i_--r--_t--_r----jf---t-___j--_t--__j_--i_--r--_t--_r--+_--t-___j--_t 1950 J 1951 1952 1953 1954 1955 1956 1857 1956 1959 1960 1901 1962 1953 1964 1965 HoS 1961 1968 H69 1970 1911 1912 1973

NOTE; BLANK SPACES INDICATE NO MEASUREMENT MADE

FIGURE 11. --DEPTH TO WATER IN SELECTED WELLS IN ALTAR AND AVRA V ALLEYS AND ESTIMATED ANNUAL PUMP AGE IN AVRA V ALLEY. (IN TWO SHEETS. ) SHEET 1 OF FIGURE 11.

25

26

"~ .. '" ,.

"

300 ~ (D-12~lO)20. IRRIGATION WELL, OEPTII 560 FT (111 M). r------t--i---j--+--r---t---t---r-t--c-4---t---r--r--t--J WATER· TABLE AQUIFER. AVRA VALLEY

I~

(1)..12-11)20, IRRIGATION WELL, DEPTH 375 FT (114 M). r---t---t--+-t-----t--i---j--+--r-----t--i---r-+--t--C----j WATER_TABLE AQUIFER, AVRA VALLEY

" · 1 1 I 1 -l\. 1 1 · 1 1 1 1 1 v 1'-. J

· I J I I 1 1 1""- V ........ IL -· (0-11-10)36. STOCK WELL, OEPnI UNKN01,l.'N.

· WATER_TABLE AQUIFER. AVRA VALLEY

·

(O-H_H"', mR>GATIONWEL4 OEen"," FT ""M), f-+--+--t--+-+-+-f-+--+--t--+-+------+t---=F=t--WATER_TABLE AQUIFER. AVRA VALLEY

HM3 330 L,,'C'A-F-------------L---'---'---L-L-----'--'----'--;N;;;OT;:;E::-, ;;;BLA~"";_;';;;PA;;:c;;;E'~m~O'CA"T;;;E~NOC;C';;;'"C;CAru~";;:;'ffi;;;=;;C;;MA;;:;O;;:E'--200 160

FIGURE 11. --DEPTH TO WATER IN SELECTED WELLS IN ALTAR AND AVRA VALLEYS AND ESTIMATED ANNUAL PUMPAGE IN AVRA VALLEY. (IN TWO SHEETS. ) SHEET 2 OF FIGURE 11.

n 0 r-I--

-----0

--------r-0

------ ------0

"~ 0

"-,

~ .......

----- '--..... r--

r-r-r-----............ V "" -4B -160

ELOY AREA

0

0 r--r-r-r--0 r--t---- r-0

r----- r---. 0

~ r---0

l-I----0

I---- I-----30 -10

r-- ---CASA- GRANDE-FLOREt.'CE AREA

0

0 -l-t--0 1-

t--~

0

"'-0 1'\

-2 -8 0 I~

'" 0 ~ ---....

D ---r---.

0 -.........

--- -......... ~

"'-.. I'---- ----~

STANFIELD-NtARICOPA AREA

-72 -240

HM3 l03AF

J :-""' Io

FIGURE 12. - -CUMULATIVE AVERAGE CHANGE IN WATER LEVEL BY AREAS AND ESTIMATED ANNUAL PUMP AGE IN THE LOWER SANTA CRUZ BASIN.

27

r--r-

:--........ -

28

POTENTIAL WELL PROnUCTION, IN GALLONS

PER MINUTE (OPM), ONE GALLON P1;R MINUTE

EQUALS 3.765 LITERS FER MINUTE

D 50 TO MORr:; THAN 2, sao

MOST WELLS IN AREA CApABLE OF PROOUCING 1,000 OP1l10R MORE

~ 101'0500

MOST WELLS CAPABU; OF PRODUCING 100 01'1>1

BASE FROll.[ U,S. GEOLOGICAL SURVEY lOon:: THE ABOVE VALUES ARE llASEDON THE ASSUMPTION THAT -ruE WELL IS LOCAn:O FA VORABL'l, IS SUFFICIENTLY DEEP TO

TAP TIlE AQUIFER, AND 1S PROPERLY CONSTRUCTED 10 15 20 MILES

LLJ-LL~ ____ ~ ____ ~' ______ L' ____ ~,

SWI ,-'-,-'-, L! 9L----' __ -'lp __ -'-lr ___ 20-'-, ___ 'LC __ -,3P KILOMETERS (11)

-* INOBXWELL UPPDlI PART OF FRACTION, 3GB, IS DEPTH TO WATER, m FEET,

1813, LOWER PART OF FRACTlDN, -10, IS CHANGr: IN WATER LEVEL, IN FEBT, 19Ga¥7~; {l1) INDICATES llYDROGRAPlt FOR TillS WELL IS SHOWN IN FIGURE 17. ONE FOOT EQUALS O.S1l46 M£TER. AREAS INCLUDED ON THIS MAP {SEE FIG. I) ARE, :~~ RIVER VALLEY, WAT:E:aMANWASH AREA, AND GU.A BEND

FIGURE 13. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE ill WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE CENTRAL PART OF THE BASIN AND RANGE LOWLANDS PROVINCE.

100M

::,'! ':':,":.' f---1--L-~-"-----''---'---'--+-r--t--+-+-t--f---fV-+-+-r--t~--'''..q-+-+-r---t ~ Uy (.A-4-2)l4. ABANOONEO WELL, OEPUI 662 FT {202 M).f--+-+-+--+---t--+-+-t--f--+-+--f--~--"'+-+--I

WATER_TABLE AQUIFER

152 500L-_____________ ~_L_~_-L_-L_~_L_~ _ _L_~_L_~ _ _L _ _L_~_L_~

'-

WA TEft- TABLE AQUlFER

"- -" "-

'" "- , iI\

\ 1\ \j 'I \ \ f'\

w "v "\ . 'v \ " \r\.

:::~~'T:::::::::~: WELL, DEPTH l6S FT \112 M)l "', I" V

\ \ \ V V \

\/ \ \ / \/\ I\. r--.. r--.. '" '" i'-.. '-./ \/ V V

{D-1-7)31. OBSERVATION WELL, DEPTH 290 FT (SS 11.1)

PERCHED WATER TABLE

/ 1/

(D-2-8)7, IRRIGATION \~ELL, Or:P111 COO FT (183M). f--+-+-+-+--+--+-+-+--f-/---c,IL-t--+--+-+-+---I WATER- TABLE AQUlf"ER

10501195111952 1953 1954 1955 1956 1951 1958 19:;0 1960 1961 1962 1%3 1964

FIGURE 14. - -DEPTH TO WATER IN SELECTED WELLS IN THE SALT RIVER VALLEY.

29

, ~

'-.....

-61- _2

, ----,

,

-JOt- -10 ,

,

,

,

, QUEEN CREEKAHIGLEY-GILBERT AREA

,

, """!-'"'"'" r-1- ./' r---. r-t"--, ........ V """ t-- 1--~ , I"-1"'--. , -I

-24 r- -8 O

,

0

'tEMPE-MESA. CHANDLER AREA

,

--r-.... ~

I'---

"'" '-..... ......... r----""" t-- r--..

\'--r--t-............ :--. r---

rti-l

........ r---~ ..........

....... 1'------ /

~ V ---

/ ............

r- /

- -

----

w o

,"·,11111111111111111 III 111111*NtLIIIIIIIIIII I • f"+='=L: I I-+-t-f--

FIGURE 15. --CUMULATIVE AVERAGE CHANGE IN WATER LEVEL IN THE QUEEN CREEK-HIGLEY -GILBERT, TEMPE-MESA-CHANDLER, AND PHOENIX-GLENDALE-TOLLESON AREAS OF THE SALT RIVER VALLEY.

M

"~

-24J-- _8

,

,

,

,

,

,

_H1L -DD l

HMJ IOJAF

t---I- -...

b-- -....... l'-- -.........

........ 1'--b-

""'-~

'" ~ ~

i'--I"---. -...

'" ~ i-t--r--

LITCHFIELD- BEARDSLEY-MARINETTE AREA

../ -.........

FIGURE 16. --CUMULATIVE AVERAGE CHANGE IN WATER LEVEL IN THE LITCHFIELD-BEARDSLEY-MARINETTE AND LIBERTY-BUCKEYE­HASSAYAMPA AREAS AND ESTIMATED ANNUAL PUMPAGE IN THE SALT RIVER VALLEY.

t--r----t--r--

W I-'

32

~[ ~ '" ,.

0

I I I I I 1 J 0

I I I I I I I -0

0 I I I I I I J - b 01- {e.3-I)n. IRRIGATION WELL, DEPTH 1175 F1: (358 M) r--o /- WATER-TABLE AQUIFER

0

". UO

'::~ 114 370 /- (e_s_lll, SroCK WELL, DEFTI! 311 FT (113 M).

380 J--- WATER-TABLE AQUIFER

no

(C·2.i)19, IRRIGATION WELL, DEPTI! 802 FT (244 M). I--t--t-+-t--t---l---t--i--t--t--t-+-f--t--t----i WATER-TABLE AQUIFER

(C-2.2)25. IRRIGATION WELL, DEFTI! 08a FT (269 M). 1--I--+-+-t---"I---t--t--+-1--I--+-+-+--I--""..----1 WATER-TAHLE AQUIFER

\

-I'--

(e_2_2)IO, IRRIGATION WELL, nEPTI! ,50 FT (229 M).

280 ~ WATER-TABLE AQUIFER 1---t--t--+--t--t--t--i--t--tr--+--t--+--1--t--t---j HM3 29010L,A-F--------------L---'---'---L--L---'-~-~"'U;;C;TE~,--;B;;CU.o;NK;O'''''">.A~CEC;'~'"C;;;m;:;CACCm;;-' N"'OC;;M=EA';;;U';;;E>;;;m;;;N';cn;;C"';;;D"'E-~

'"

FIGURE 17. - -DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE WATERMAN WASH AREA.

{C-2-4)29. UNUSED WELL, DEP1H 424 FT (129 M).

WATER-TABLE AQUIFER

{C.4.4)9. mn)SI:D WELt... DEPnl 300 FT (01 M)

WATER· TABLE AQUi,ER

NOTE; BLAh" SPACES INDICATE NO MEASUREMENT MADE

FIGURE 18. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE GILA BEND BASIN.

33

POTl':NTlAL Wl'lLL PRODUCTION, IN GALLONS PER MINUTE (apM\. ONE GALLON PER MINUTE

EQUALS 3,185 LITERS Pl':l! MINUTE

o 50 TO MORE THAN 2, SOO

MOST Wl':LLS IN AREA CAPABLE Of PRODUCING 1,000 aPM OR MORE

~ MOST WELLS CAPABLE OF pRODUCINa 100 GpM

~ NOTE: THE ABOVE VALUES ARE BASED ON THE ASSUMPTiON TIJAT ----ni£ WJ':LL lSI..OCATEDFAVORABf.,Y, IS SiJFFIClENTLYDEJ':P TO

TAP THE: AQUIF£R, AND 15 PRopeRLY CONSTRUCTED

In)

-* lNDr:xWELL UPPER PART Of fRACTIO!'I, 70, IS Df:PTll TOWATf:R, IN ff:IIT,

1973: LOW!:R PART OF FRACTION, -I, I5 CHANGE IN WATER LEVEL, IN fEET, 1~£O_7J; (2.) lNOlCATES llYDROGRAPH FOR THIS WELL E 51!OWN IN FiGURE 22. Oln: FOOT EQUALS O. 30U UETER. AREAS INCLUDl:OON l'HJ5 MAl' (Sl:E :rIO. I) ARE lfAilQUAHAI.A I'I.AINS AREA, ~~MULLeN VALLEY, aILA RIVER DRAINAGe FROM PAINTED ROCK !lAM TO TEXASHn.L, RANEaRAS PI.AIN AREA, WELL'ION-lIOIiAWKAREA, AND YUMA ARl:A

FIGURE 19. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE SOUTHWEST PART OF THE BASIN AND RANGE LOWLANDS PROVINCE.

M

"'~ .. " ..

(B-2-10lls. SroCK WELL, PEPTI[ 494 FT (151 M).

NEAR CENTENNlAL WASH

1\ \

(&'1_9)7. IRRIGATION WELL, DEPTH 640 FT (256 M).

WATER_TABLE AQUIFER

--

(C_1_9)1l. IRRIGATION WELL, DEPTH UNKNOWN.

WATER-TABLE AQUIFER

-

-1\ \

\ \

\

NOTE. BLANK SPACES INDICATE NO MEASUREMENT lI.1ADE

FIGURE 20. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE HARQUAHALA PLAINS AREA.

35

36

" . ."

• i "~ ~ ..

2 " E

~

"I " sa 200

m .. ",

70 HO

74 UO

'"

UO

~

(B-7~S)15. IRRiGATION WELL, DEPTIl 1812 FT (552 MJ.i---l--+-+-t--f----t-+--t--t----t--t--j--t-----jr----t----j WATER~TABLE AQUIFER

(B-7~9)15. IRRIGATION WELL, DEPnI 750 FT (229.1>1). i---f--t--+-t---f--t--t--t--t---t--t-T-t-r--i-i WATER*TABLE AQUIFER

(B-8~lO)36. IRRIGATlON WELL, DEPTII lJ52 FT (412 Ml

WATER~TABLEAQUIFER

(H,.7~1l)27, UNUSED WELL, DEPUI HO FT (l04 M) •

WATEfl...TABL.E AQUIFER. NEAR CENTENNIAL WASil

~--

~+-~~-+~--~4-~~~--~T-~-r~~

t:::: {B-6-U115, IRRIGAnON WELL, DE?TII 1432 FI (436 M).f-----t--t--+-t---f--t--+-t--f----t--t---t--t-r---t---j WATER~ TABLE AQUIFER

(B·S·U)9. OOMESTIC WELL, DEPTH 460 FT (140 M).

WATER-TABLE AQUIFER

NOTE,; BLANK SPACES INDICATE NO MEASUREMENT MADE

FIGURE 21. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN MCMULLEN VALLEY,

,~

"r--'--~--'---'---r--'---'--,---'--,---'--'---'---'--,---'--,---,--,---r---'--,---,--'

:~ "~-I~~,-_,_,,_,;L.-oo-"J":-n-c-~LL-4-D~;-'rn--nL':-FT-'~';-M-,.-+--~--+---~~---+I~--~--+---~-+---r--~--+-~r--+---+--~ E WATER_TABLEAQU~ER. RANEGRAHLMN

L 1 1 I I I I

',::,~ I~O r- 001-5_16)10, ABANOONED WELL, DEPTIt 164 PT (50 .M). f--j---+--+--+---~~--+--+---j---j---+--~--+---~--~-+

::~ :,:.1

WATER- TAELE AQUIFTR, RANEGRAS PLAIN

I I

I I

I I

L I

J I

I I

I I

150 f-. (C-4-10)22. UNUSED WELL, DEPTI! sao FT (152 M).

WATER-TABLE AQUIFER, PALOl\1AS PLAIN

::[ "~~::EFF~R=R~~=t=l

:Y ,:: f---,)J,_-,,-,,-tLm-R'-OA.l+-ID-N-J.L'L-L-D~J;-TI-' -" • .LiF-T-I~"lL-,_".-+--+--+---t--j---+--+--t--j---+--+--+---t--j---+---+---1 ,,~ r WATEe_mCEAnU"'ER. 'AWM""LMN

:,;.~ :i-~L"i .":,."~ -~'"~ ",: ~ WA=R_TAnCEAQU~". ,wnNFLPWN

-

FIGURE 22. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMP AGE IN THE GILA RIVER DRAINAGE FROM PAINTED ROCK DAM TO TEXAS HILL AND IN THE RANEGRAS PLAIN AREA.

37

38 ,

,

· ,

· f' ::r" .. "

· · · · · · ·

IT

I I I I I I I I I I I I I I. f-- --I-- /' (C-8-23)21. IRRIGATION WELL. DEPTH 163 FT (50 M),

WATER-TABLE AQUIFER. sourn GILA VALLEY

I I I I I I I I I I J-

1 1 1 I I I I (C_9_2l)l, UNUSED WELL, OEPTII401 f'I (122 M).

WATER_TABLE AQUIFER. yUI>iA MI:SA

1 I I I I I I ::E .. "~ L-__________________________ ~ __ L_~ __ _L __ _L __ ~ __ L_~ __ _L __ L_~L__i __ _L __ ~ __ L_ __ L_~

(C_S_23)31. UNUSED \'\'ELL, DEPTIl131 }'T (42 M).

WATER-TABLE AQUIFER. yU!l.iA MESA

~ r "I--+,c-.,-•. -",+-,,-. -u-lNU-"-D-WE+L-"-D-Ef-,rn--lO+' -n-. _'''l->_-:-+_..../ __ l-I---'-,-k,/./~../=::.....jfVf---+_./ __ f-'V __ -+I'-./ __ +./" __ t-.--I fLLV __ t-........ __ f-V __ +~----'l-_t---l U 8St-

L-~WA~T~ER=.T=A=BL=E=A=QU=>F=ER=.~Y=U=M=.='~~ ______ ~ __ L_~L-_L __ _L __ ~ __ L_~ __ _L __ L_ __ L__i __ _L __ ~ __ ~ __ ~ __

-f-:,:, ~ lOa c- ~.n.,~. UN~ED WE~L' DE:m ",lFT ,n:.n t 3(}5r- WA TEll_TABLE AQUIFER. YUJl.L'I. MCSA

':~.10~~~.L.........L...~~ (C_lIl-U)35. UNUSED WELL, DEPTH 112 FT (34 M).

WATER-TABLE AQUIFER. YUMA VALLEY

NOTE, YUMA AREA meLUOES SOUTH OlLA VALLEY, YUMA MESA, AND YUMA VALLEY. ~EGlNNING IN 1947 IN YUMA VALLEY AND IN 1961 rn SOUnI GILA VALLL"Y, PARI OF

nJE PUMPAGE WAS FOR DRAINAGE PURPOSES

FIGURE 23. --DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN THE YUMA AREA.

POTENTIAL WELL PRODUCTION,

PER MINUTE (G1'11). ONE GALLON PER l>.lINUTE

NOTE: THE ABOVE VI.LUES AilE BASED ON ru)"; ASSU/l.IPTION TIlAT ~E WELL IS LOCATED FAYORAllLY, IS SUFFICIENTLY DEEP TO

TAP THE AQUIFER, AND IS PIlOPERLY CONSTllUCTED. IN SOME AllEAS, WELL PRODUCTION IN THE 0 TO 10 GPM RANGE COULD BE rnCREASED AT DI:PTHS OF MORE mAN 2,000 FEET

(25)

.w llim::::X:WELL

UPPER PART OF FRACTION, Ill, IS DI;PTH TO WATER. IN FEer, 1973, LOWER 1'ART OF FRACTION, +5, IS CH.\NGE IN.WATER LEVEL, IN FE£T, 19G8-73, (25) INDICATLS ITYD,IOGRAPH FOR THIS WELL rs SHOWN IN l'mURE 25. ONE FOOT EQUALS 0.3048 METER. AREAS INCLUDED ON 'nUS l\!Al' (£EE FIG, il ARC BIG SANDY VALLEY, SACRAlI!£NTO VALLEY;-ANDlIUALAPAI VALLEY

114~

~~~"-__ -,--__ -,IIO ___ L-_---,2pMILES

'WI '->-' L' u' ?_----'_----'lp_--L1p __ 2.L,o __ 2r.,O __ ,3.fp KILOMETERS

FIGURE 24. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE NORTHWEST PART OF THE BASIN AND RANGE LOWLANDS PROVINCE.

39

40

M

::~ :::~CIO=:::::::I~g:::;:::~F=F=~~~f=+=~~ 5G 180 :~::~:~~~~N::::;:,L4 DEPnt 440 FT (134 ~IJ. c-c-f--+-+-+--c--f--+-+--+---I--+-+-f--c--f--j no 54 lOOL__OO_R_'_HO_F_CO_'_ro_N_"_""_D_C_LW_F_' ____ __"__--"-_-'-_L__'._---L_--"-_-'-.......J_---'-_-L_-'-_L_-'._--"-_--"----J

::1 ;;f-----+----+--+--+---+--+----+---+-+/I--------+----+--+::---......---+--+-+--+--+-----+----+--+---+---t--t------J '" '" f____---""=----L--'--L----L----'----'----+__-j--+-+-+_-+__-jl'-,,.-"~-+-+--f____-+-+-+_-+__-j---j 34 110 (B-23~13)l9. UNUSED WELL, DEPTH 150 FT (46 :M). f---+--+--I---+-----jf---+---l-I------=tr-:::::=F~+=1==1=:::::r::::::=F-_l.__---j

WATER_TABLE AQUIFER.

3a 120 HACKBERRY \VELI...F1ELDAREA; HUAU\.pAI VALLEY

''"L---------------'-.......J----'---L--'--L-~---"---L--'--L--'.--L--'--L-~---'

:~ :,:,:.tr~~~~~:":-,~,,I,: .. ~U~:'~E:D~wIE:L:~~~:E':':H:' 1"~F~'~~~":M~I.1:::t=~===t==~::t===t==t===t=il=t:::t~~==t==l==~~:t==j WATER- TABLE AQUlFER,

U 140L-_K_'H_G_~_R_~_L_~_F_m_LD_A_R_~~.~_CM_M_E_mu_V_AL_U_Y_'__L_~ _ _L_-L_-'-_L__'. __ IL--'._---L_-L_-'-~ _ ___'_ _ _L~

...

I I I I I I I J l I

(B-16-13)36, DOMESTIC WELL, DEPTH 15 FT (5 M). f____-+-+-+_-+__-j--+--+-+_-f____-+-+-+-+__-j--+---I WATER-TABLE AQUIFER. BIG SANDY VALLEY

PUMPAOE. HUALAPAI VALLEY

FIGURE 25. --DEPTH TO WATER IN SELECTED WELLS IN THE NORTHWEST PART.OF THE BASIN AND RANGE LOWLANDS PROVINCE AND E'STIMATED ANNUAL PUMPAGE IN HUALAPAI AND SACRAMENTO V ALLEYS.

POTENTIAL WELL .PRODUCTION, IN GALLONS

FEll MINUTe WPM). ONE GALLON PER MINUTE.

(27)

-4

112"

FIGURE 26. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE WEST PART OF THE CENTRAL HIGHLANDS PROVINCE AND THE SOUTH­CENTRAL PART OF THE PLATEAU UPLANDS PROVINCE.

41

35"

42 ::~ :t __ =-~(~~-':'_:'H~I'~OO:M~~:TI:c~"~,IE:C4~~~,ru~,~"I~FT~('~~M:,.~===t~j:::t::j:::t:::t==t===t==l==:f==~==t:~::,,;t~--~==j 18 t 60 _ ARTESIAN AQUIFER. VERDE VALLEY

160 r- (1J..16~1)7. UNUSED WELL, OEPTII 758 FT (231/1.1).

110 r- ARTESiAN AQUIFER, LHTLE CHINO VALLE:Y

I I 1 J J J I I I I I

-

150 t-- (8-11-2)6, IRRIGATJON WELL, OEPTIl 342 FT (104 M). f----1-+-+-j---l--+-+-+--j---+-+-+-j---l--+--i 160 r- WATER_TABLE AQUIFER, DiG CIltNO VALLEY

I I I I I I I I I -r I I

20 r-- (B-16-4)14. IRRIGATION \\ELL, DEPIH 352 FT(107 j],JI,f---f-+-+--j---l--+-+-+--f--f--j--+-t---t--j---\ JO r-- ARTESIAN AQUIFER, WILLiAMSON VALLEY

NOTE: BLANK SPACES INDICATE NO MEASUREMENT MADE

PUMPAOE, BIG CIIINO VALLEY

FIGURE 27. - -DEPTH TO WATER IN SELECTED WELLS AND ESTI­MATED ANNUAL PUMPAGE IN SEVERAL AREAS IN THE CENTRAL HIGHLANDS PROVINCE,

~'-'-, 9 _-'------'-------'------'z,o MILES

'~11~1~' ~"~~~" ---,3f KILOWETERS

FIGURE 28. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE EAST PART OF THE CENTRAL HIGHLANDS PROVINCE AND THE SOUTH­EAST PART OF THE PLATEAU UPLANDS PROVINCE.

43

44 IT

0

I I I I I I I I I I ~ I I 1 1 1 I I I

f-- (.A-13_2B)21, DOMESTIC WELL, DEPnllSl 1"1' (49 Mt

r-- ARTESIAN AQUIFER. 51'. JOUt."S AREA

60 I-- (A-a_26ll8. ABANOONED \\l:LL, DEPTH 410 FI (125M).

10 I-- ARTESIAN AQUIFER.

40 130 I-- (A_13_21)24. IRRlGATlON WELL, OEPTIl 320 FT (loa 1'1.1).

140 t-- ARTESlAN AQUIFER. SNOWFLAKE AREA

270 l-- (A_13_21)29. ABANDONED WELL, DEPTH 611 FI (205M).

280 f-- ARTEStANAQUIFER. SNOWFLAKE AREA

{A_17_21)lO. UNUSED VlELL, DEPTH 160FT (H M).

WATER_TABLE AQUIFER, HOLBROOK AREA

1281) t-- (A-il-GI3S, MUNICIPAL WELL, DEPTIl1600 FT (4SSM).

1290 f--- WATER-TABLE.AQUIFER, FUGSTAFF AREA

" 1'-

I""" ./

--1300 1950 1951 1952 )1953 1954 1955 1955 1957 )1058 1959 1960 1961 1962 1963 1964 1965 1966 1967 1956 1969 1970 19H 1912

NOn:; BlANK SPA.CES iNDiCATE NO IU:ASUREIIE:HT MADE

FIGURE 29. --DEPTH TO WATER IN SELECTED WELLS IN SEVERAL AREAS IN THE PLATEAU UPLANDS PROVINCE.

POTErlTIAL WELL PRODUC1'ION, IN GALLONS PER ~!!NUTE (GPlI!). ON!: GALLON Pr:R MINUTE

o 50 TO 500

MOST WELLS CAPAIILr: OF PEODUCTh'G lO~ UP)'I

m MOST WEL!..s DRYOR YIELD POOR QUALITYWATEIl

5 10 15 20 MILES ,.~,~, ~, '-'--_-"--_~I _----'--' _-"

Ip ~O 25 3p KILOMETERS

FIGURE 30. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER. 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE NORTH-CENTRAL PART OF THE PLATEAU UPLANDS PROVINCE.

45

46

R. 2.0 E. 110'

l'U1 g:- riAL \I 1:1.1- !'I"'PI:('T"'~, ,,, G.IL! o>.~

I'I:H liD l'T ~ (nl'\n. "~I: Co II.Lt'" I'E~ ",!'. "TI: ~QL'AI_> 1.1<'.' UTE,!> 1'1':11 '.!ll> I: TI!

~l@ 'LjO~T "'L"LI~ C.II' .... al-E 01" 1',10DL1CI?>G IU !H'~I

FIGURE 31. --POTENTIAL WELL PRODUCTION, DEPTH TO WATER, 1973, AND CHANGE IN WATER LEVEL, 1968-73, IN SELECTED WELLS IN THE NORTHEAST PART OF THE PLATEAU UPLANDS PROVINCE.