ARIZONA WATER ARIZONA WATER ATLAS & WATER USE ATLAS & WATER USE

DATADATA Linda StitzerLinda Stitzer

Arizona Department of Water Arizona Department of Water ResourcesResources

lsstitzer@azwater.govlsstitzer@azwater.gov

602-686-0035602-686-0035

Arizona Water Atlas Arizona Water Atlas PurposePurpose

Assist local and regional planning Assist local and regional planning efforts by providing water resource efforts by providing water resource data and informationdata and information

Provide compiled information and Provide compiled information and data at one location from many data at one location from many data sources at the planning area, data sources at the planning area, groundwater basin and community groundwater basin and community levellevel

Provide general public informationProvide general public information

Arizona Planning AreasArizona Planning Areas ““Planning Area”Planning Area”

concept that provides concept that provides a regional perspective a regional perspective on water resources and on water resources and issuesissues

Composed of 51 Composed of 51 groundwater basinsgroundwater basins

Active Management Active Management Areas (AMAs)Areas (AMAs)

Central HighlandsCentral Highlands Eastern PlateauEastern Plateau Lower Colorado RiverLower Colorado River Southeastern ArizonaSoutheastern Arizona Upper Colorado RiverUpper Colorado River Western PlateauWestern Plateau

Atlas Organization & StatusAtlas Organization & StatusVolumes 2-8 Volumes 2-8 Planning Areas final Planning Areas final and posted on web and posted on web (web-format)(web-format)

Volume 1 Executive Volume 1 Executive SummarySummary Statewide overview, Statewide overview,

important important summary summary information, information, background, data background, data sources and sources and methods methods

August 2010August 2010

Atlas Volume 9Atlas Volume 9 Resource Sustainability Assessment - 7/2011Resource Sustainability Assessment - 7/2011

Interpret and evaluate Atlas findings to Interpret and evaluate Atlas findings to support water management decision support water management decision processesprocesses

Evaluate supply vulnerability to determine Evaluate supply vulnerability to determine resource sustainability e.g.resource sustainability e.g.

Limited physical suppliesLimited physical supplies Current or projected demand exceed suppliesCurrent or projected demand exceed supplies Supply sensitivity to drought or other shortageSupply sensitivity to drought or other shortage Competition with environmental demands or Competition with environmental demands or

potential for impactpotential for impact Legal issuesLegal issues

Volume 9 – Sustainability Volume 9 – Sustainability AssessmentAssessment

Identify water supply vulnerability Identify water supply vulnerability basin by basin and by demand centers basin by basin and by demand centers (not individual communities)(not individual communities)

Qualitative and quantitative metricsQualitative and quantitative metrics Vulnerability ranking will be used to Vulnerability ranking will be used to

determine whether supplies are determine whether supplies are sustainable in the short-term and long-sustainable in the short-term and long-term 25, 50 and 100 yearsterm 25, 50 and 100 years

100 year population and demand 100 year population and demand projections by basinprojections by basin

Targeted stakeholder inputTargeted stakeholder input WIFA grantWIFA grant

Volume 9 – Sustainability Volume 9 – Sustainability AssessmentAssessment

Integrate regional/local water Integrate regional/local water planning studiesplanning studies e.g. USBOR appraisal studiese.g. USBOR appraisal studies

North Central ArizonaNorth Central Arizona Mogollon HighlandsMogollon Highlands Sierra Vista SubwatershedSierra Vista Subwatershed Verde HighlandsVerde Highlands Water Supply and demand projections; Water Supply and demand projections;

alternatives to meet “unmet demands”alternatives to meet “unmet demands” e.g. Colorado River Basin Studye.g. Colorado River Basin Study

Complex water supply and demand Complex water supply and demand projections to 2060 for areas either currently projections to 2060 for areas either currently using or anticipated to need Colorado River using or anticipated to need Colorado River water supplieswater supplies

Colorado River Basin Water Colorado River Basin Water Supply and Demand StudySupply and Demand Study

Comprehensive study to define current and future imbalances in water supply and demand; develop and analyze adaptation and mitigation strategies to resolve imbalances (1/2012)

Arizona Focus: M&I water demand 2010-2060Arizona Focus: M&I water demand 2010-2060 CAP service area + on-River + North Central CAP service area + on-River + North Central

Arizona, Yavapai Highlands, Sierra Vista Arizona, Yavapai Highlands, Sierra Vista SubwatershedSubwatershed

Estimate magnitude of unmet Colorado River water Estimate magnitude of unmet Colorado River water demand (550,000-600,000 acre-feet)demand (550,000-600,000 acre-feet)

Demand Study Tool (Ecosystem Economics)Demand Study Tool (Ecosystem Economics)

Planning Area Volumes Planning Area Volumes ContentContent

OverviewOverview of entire of entire planning areaplanning area

GeographyGeography

HydrologyHydrology

ClimateClimate

Environmental Environmental ConditionsConditions

instream flow claims, instream flow claims, ESA, WPF, protected ESA, WPF, protected areasareas

Population, Growth and Population, Growth and Water UseWater Use

Water SupplyWater Supply

Cultural Water Cultural Water DemandDemand

Sector/Community/SiteSector/Community/Site

Water Resource IssuesWater Resource Issues

Planning Area Volume ContentPlanning Area Volume Content DetailedDetailed BasinBasin water resource characteristics: water resource characteristics:

maps, tables maps, tables GeographyGeography Land OwnershipLand Ownership ClimateClimate Surface Water ConditionsSurface Water Conditions

Streamflow, reservoir data, etc.Streamflow, reservoir data, etc. Perennial/Intermittent Streams and Major Perennial/Intermittent Streams and Major

SpringsSprings Groundwater ConditionsGroundwater Conditions

Major aquifers, recharge, flow direction, well yields, Major aquifers, recharge, flow direction, well yields, water levels and water level changes, selected water levels and water level changes, selected hydrographshydrographs

Planning Area Volume ContentPlanning Area Volume ContentBasins (cont.)Basins (cont.)

Water QualityWater Quality Sites with Drinking Water Standards exceedencesSites with Drinking Water Standards exceedences Impaired lakes and streams and effluent dependent reachesImpaired lakes and streams and effluent dependent reaches Contamination sites (WQARF, VRP, Superfund, RCRA, DOD)Contamination sites (WQARF, VRP, Superfund, RCRA, DOD)

Cultural Water DemandsCultural Water Demands Population (1980-2030)Population (1980-2030) Water use sector demand (1971-2005)Water use sector demand (1971-2005) Effluent generation and disposalEffluent generation and disposal

(Riparian/environmental demand unable to quantify)(Riparian/environmental demand unable to quantify) Water Adequacy/Assured Water Supply Water Adequacy/Assured Water Supply

DeterminationsDeterminations Subdivisions, # of lots, etc.Subdivisions, # of lots, etc.

Arizona Water Atlas Data Arizona Water Atlas Data SourcesSources

Over 60 data sourcesOver 60 data sources Cultural demand data sources Cultural demand data sources

include:include: USGS Water Use ContractUSGS Water Use Contract

Annual municipal, industrial and agricultural use Annual municipal, industrial and agricultural use by basinby basin

Hydrologic and Planning StudiesHydrologic and Planning Studies USGS, USBOR, ADWR, consultantsUSGS, USBOR, ADWR, consultants

Arizona Drought Preparedness Plan Arizona Drought Preparedness Plan (2004)(2004)

CWSCWS annual water use reports and water annual water use reports and water resource plans (2007)resource plans (2007)

Arizona Water Atlas Data Arizona Water Atlas Data SourcesSources (cont.)(cont.)

AMA AssessmentsAMA Assessments Fourth Management Plan Precursor; Annual Fourth Management Plan Precursor; Annual

Reports and AWS Designations dataReports and AWS Designations data Wastewater DataWastewater Data

Clean Water Needs Survey – WIFAClean Water Needs Survey – WIFA ADEQ filesADEQ files EPAEPA

Arizona Water Supply & Arizona Water Supply & DemandDemand

Colorado River on-river diversions were 2.01 Maf of which 0.85 Maf was returned to the system for other use.Assumes all well pumpage is groundwater, except for accounting surface wells along the Colorado River.

Demand does not include CAP long-term storage and system losses (approximately 0.3 Maf) or environmentaldemands on the Colorado River (approximately 0.02 Maf)

SECTOR DEMAND 2001-2005 (Maf)

Agricultural4.7, 71%

Municipal1.5, 23%

Industrial0.4, 6%

WATER SUPPLIES 2001-2005 (Maf)

CAP 1.55

Colorado On-river

1.25

Gila & other0.46

Effluent 0.21

Salt &Verde 0.5

Groundwater2.99

Supply/Demand v. Supply Supply/Demand v. Supply AvailabilityAvailability

Colorado River entitlements, CAP Colorado River entitlements, CAP contracts, decrees, settlements, contracts, decrees, settlements, groundwater rights, assured and adequate groundwater rights, assured and adequate water supply determinations set legal limits water supply determinations set legal limits on physically available water supplieson physically available water supplies

Available GroundwaterAvailable Groundwater Limited water budgets; quantified deficitsLimited water budgets; quantified deficits Recharge, storage dataRecharge, storage data

EffluentEffluent Generation v. potential for reuseGeneration v. potential for reuse

Available v. Sustainable suppliesAvailable v. Sustainable supplies

Planning Area Water Demand Planning Area Water Demand (2001-2005)(2001-2005)

U. Colorado2.3%

C. Highlands1.1%

E. Plateau2.3%

L. Colorado38.6%

AMAs48.7%

SE Arizona6.9%

W. Plateau0.1%

Planning Area Water Supplies Planning Area Water Supplies as a Percentage of Demandas a Percentage of Demand

0

10

20

30

40

50

60

70

80

90

perc

enta

ge

AMAs C. Highlands E. Plateau L. Colorado SE Arizona U. Colorado W. Plateau

Groundwater Surface Water Effluent CAP

Water Providers in the Little Colorado River Water Providers in the Little Colorado River Plateau Basin serving 450 acre-feet or more Plateau Basin serving 450 acre-feet or more

water per year in 2006water per year in 2006

Water Provider1991 (AF)

2000 (AF)

2006 (AF)

Arizona Water Company-Lakeside 597 897 792Arizona Water Company-Overgaard 183 337 503Doney Park Water 455 737 781Eager Municipal Water 680 781 668Flagstaff, City of 8,172 9,927 8,485Holbrook, City of NA NA 790Page Municipal 2,740 2,740 2,250St. Johns Municipal NA NA 662Snowflake, Town of 872 1,323 1,416Taylor, Town of 445 721 870Winslow Municipal NA NA 3,744Source: Community Water System 2006 Annual Reports, USGS 2005

SE AZ Agricultural IrrigationSE AZ Agricultural Irrigation(USGS, 2007)(USGS, 2007)

Basin Willcox Safford Douglas DuncanUpper San

PedroLower

San Pedro

2007 Irrigated Acreage 50,600 acres 41,300 acres 13,150 acres 3,450 acres 1,000 acres 600 acres

Crop Type            

Corn 38% <1% 52% 15% 1% NA

Cotton 2% 58% 1% 6% NA 38%

Orchard 10% 9% 10% NA 15% NA

Pasture (Alfalfa, Hay) 28% 29% 27% 54% 78% 54%

Sorghum 3% <1% 2% 24% NA 8%

Vegetables 10% 1% 7% NA NA NA

Wheat 1% 2% NA 1% NA NA

Other 8% <1% 1% NA 6% NA

Irrigation Type            

Center Pivot 79% 21% 85% 2% 2% 17%

Flood 16% 74% 6% 98% 63% 33%

Drip 2% 3% 8% NA 25% 33%

Sprinkler 3% 2% 1% NA 10% 17%

Effluent use by reporting facilities Effluent use by reporting facilities (c. 2006)(c. 2006)

Planning AreaVolume

Generated(af)

DirectUse(af)

PermittedRechargeStorage

(af)

CreatedWetlandDelivery

(af)

Disposal(af)

Eastern Plateau 36,100 14,900 0 2,700 18,500

Southeastern Arizona 10,600 1,670 2,000 0 6,930

Upper Colorado River 8,700 3,400 0 0 5,300

Central Highlands 9,300 1,200 300 426 7,374

Western Plateau 2,200 300 0 0 1,900

Lower Colorado River 16,700 1,600 0 0 15,100

Active Management Areas 419,346 200,700 34,000 1,350 183,296

Arizona Total 502,946 223,770 36,300 4,476 238,400

Percentage of Effluent Use Percentage of Effluent Use by Typeby Type

Agriculture 20%

Golf Course 21%

Landscape13%

Industrial27%

Created Wetland Delivery

2%

Recharge Facility Storage

17%

Closing thoughtsClosing thoughts

Considerable existing current and Considerable existing current and projected population and demand projected population and demand data at the groundwater basin, local data at the groundwater basin, local and regional leveland regional level

Projection uncertainty; Volume 9 will Projection uncertainty; Volume 9 will project groundwater basin project groundwater basin population and demand to 2110 (3-6 population and demand to 2110 (3-6 month deadline)month deadline)

Water for the environmentWater for the environment