update on california drought and coordinated … · drought california will be facing increased...
TRANSCRIPT
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Daniele Zaccaria, Ph.D.Agricultural Water Management Specialist, UC Cooperative Extension
Ph.: (530) 219-7502 Email: [email protected]
UPDATE ON CALIFORNIA DROUGHT AND COORDINATED EFFORTS BY UC CE
Annual Water Program Team MeetingUC ANR Davis, CA – February 12-13, 2015
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1) California Agriculture & Water Facts
2) Severity and Impacts of 2014 Drought
3) Current conditions: where are we at?
4) Coordinated response by UC Cooperative Extension
5) What’s next?
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California Agriculture Facts (DWR Water Plan 2010)
Water Supply in Average Year (2010) 200 (precipit. + import) Environmental use 39Agricultural water use 33 (~30% from GW)Urban water use (residential + industrial) 8.5Recycled water use 0.65 (7% = 0.65/8.5 MAF)
Total beneficial water use 80.5
MAF/Yr
> 80,000 Farms => $45 Billion Industry (< 5% GIR)26 Million Acres of Agricultural Lands
13 Million Acres of Pasture and Rangeland9.5 Million Acres of Irrigated Cropland
6.2 Million Acres Annuals3.3 Million Acres Orchards/Vineyards
> 350 crops
California Water Facts
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TOTAL BENEFICIAL WATER USE: 80.5 MAF
49%
41%AGRICULTURE
ENVIRONMENT
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6.5 MAF(19%)5.9 MAF
(18%)
3.7 MAF
930,000 ac
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Serves as a wetness index for the Sacramento River hydrologic region
The 8-station index showed 2014 as the 8th driest year in 106 years of records
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CENTRAL SIERRA
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SOUTH SIERRA
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CURRENT REGIONAL SNOWPACK: % of APRIL 1 AVERAGE
18%
18%
21%
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July 15th, 2014
Blend of 5 key indicators (Climate, Hydrology, Soil)
Sept. 18th, 2014
Feb. 3rd, 2015
http://droughtmonitor.unl.edu/Home/StateDroughtMonitor.aspx?CA
Sept. 18th, 2014
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6 out of 12 major reservoirs are around or below 35% capacity
All are far below historic averages (incl. Shasta and Lake Oroville) ~ < 50%
San Luis Reservoir (critical for the Central Valley and Southern California) is currently at 55% capacity
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NASA ESTIMATED THAT CALIFORNIA NEEDS 11 TRILLION GALLONS (33.7 MAF) TO RECOVER FROM THE LAST 3-YEAR DROUGHT
(estimate based on satellite data)
1.5 TIMES THE WATER VOLUME OF LAKE MEAD
160% OF THE AVERAGE YEARLY PRECIPITATIONOR SEVERAL YEARS ABOVE AVERAGE
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Population is growing at fast rateIMPLICATION 1:
there is an increasing internal need for food to meet the demand of population
CHALLENGE:increasing safe food
production on less fertile lands(more water & nutrients)
1990-2004 => ~ 75,000 ac. of prime agricultural land lost to urban
development in the S.J.V.
38.3 M
IMPLICATION 2:
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TREND 2Irrigated Agriculture is concentrating: San Joaquin Valley, Sacramento-San Joaquin
Delta, Imperial Valley
Cropping patterns are intensifying:Conversion from annual to perennial crops (fruit, nuts and vines)
Higher planting densities
Shift from surface irrigation to localized methods (drip & micro-sprinkler)
> 35% of the US table food on only ~1.2% of
the US farmland
ENCOURAGED BY FUNDING PROGRAMS NRCS, CDFA, ETC.
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Field crops
Orchards
Vineyards
Vegetables
Surface
Sprinkler Micro-irr.
Other
Survey of Irrigation Methods in California, 2010(Tindula, Orang & Snyder, 2013)
more frequent and flexible delivery schedules needed
by farmers
ARE WATER DISTRICTS CAPABLE TO DELIVER WATER WITH SUCH A FREQUENCY??
Questionnaire to 10,000 growers
51% usable return rate
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Source: C. HAGUE, 2015
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Irrigation System Evaluations - Kern County Mobile Lab(1988-2014)
Annual N. of Test vs. % of Micro
Source: B. Hocket, 2015
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DISTRIBUTION UNIFORMITY
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HOW ARE WE MANAGING THE AVAILABLE WATER SUPPLY?
BUT NOW THE REAL PROBLEM SEEMS FINDING WAYS TO MANAGE THE WATER DEMAND
WATER PRICING
INTRODUCTION OF WATER MARKET
REVISION OF WATER RIGHTS (untouched since 1880??)
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BALANCING WATER USE WITH ECONOMIC BENEFITS ??
FARMERS IRRIGATE UP TO Vopt TO MAXIMIZE NET PROFIT
FARMERS IRRIGATE UP TO Vmax TO MAXIMIZE INCOME (crop yields)
SOUTHERN EUROPE
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QUESTIONS
ARE CALIFORNIA GROWERS MORE WATER-EFFICIENT?
HAVE HANGES IN CROPS AND TECHNOLOGY/PRACTICES LOWERED THE TOTAL AGR. WATER USE?
IS NOW THE AGR. WATER DEMAND MORE ADJUSTABLE TO WATER STOCKS?
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Water demand & use steadily growing to higher and less
adjustable levels
Shift to permanent crop makes irrigated agriculture
less drought-resilient
THE REAL KEY BUFFER TO AGRICULTURAL PROSPERITY IS GROUNDWATER
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In the last 25 years (1990-2014) contractors received from the Central Valley Project and delivered to farmers
100% of water rights only on 3 years/25 years (12%) 75% of water rights only on 8 years/25 years (30%)
due to combined impacts of dry conditions and environmental regulations
DROUGHT IS NOT AN EMERGENCY!!!
Reliability of water supply (DWR)
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~ 5% prices increase
California’s farmers reacted quickly, by pumping enough ground water to stay competitive
ECONOMIC IMPACTS OF DROUGHT IN CALIFORNIA
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State-Wide Agricultural Production Model, SWAP (Howitt et al. 2014)
DROUGHT IMPACT LOSS QUANTITYWater SupplySurface water reduction 6.6 million ac-ft (~30%)Groundwater pumping increase 5 million ac-ftNet water shortage 1.6 million ac-ftCropped landsIrrigated cropland fallowed (mostly S.J.V.) 430,000 ac (5% of total)Jobs Total job losses (seasonal & part-time) 17,100State-wide costsCrop revenue loss $810 millionLivestock and dairy revenue loss $203 millionAdditional pumping costs $454 millionTotal direct losses $1.5 billionTOTAL ECONOMIC COST $2.2 billion
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WATER-EFFICIENT TECHNOLOGIES
FALLOW LAND WITH LOW-VALUE CROPS
INCREASE GROUNDWATER PUMPING
???
~ 75 % (GW. IS 53% OF TOTAL AG. USE)
~ 5-10 % ?
CONVERSION TO DIFFERENT CROPS
THE COMBINED SOCIO-ECONOMIC IMPACTS OF 2014 DROUGHT APPEAR MORE SEVERE THAN THOSE IN 1990
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UC OUTREACHING INFORMATION
Periodic update on the state of the drought
CALIFORNIA WILL BE FACING INCREASED CLIMATE VARIABILITY(recurrent DROUGHTS & FLOODS)
Cost of irrigation will be increasing on farming budgets
REGULATIONS
Groundwater Pumping => Monitoring & Control
ILRP (SCWCB) =>> Third party certification??
WATER DISTRICTS => Tiered Water Pricing
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UC C.E. is engaged in applied research programs to further investigate:
water use efficiency, water productivity, deficit irrigation, gw. banking
re-use of treated wastewater (and drainage water) for agricultural production
crop breeding & drought resistant varieties adapting to water-limited conditions
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Variety Trials
Adoption of New Irrigation Technologies & Practices
Surface Sprinkler Drip & micro Subsurface Drip
Crop and Variety Choice Crop Demand & Use Yield performance Drought resiliency
Technical viabilityEconomic profitabilityOptimization by Crop and Cropping Systems (rotations)
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DROUGHT TIPS DROUGHT WEBINAR SERIES
DWR Technical Assistance Project on Drought“Developing Updated Drought Management Information”
ANR - DROUGHT WEB CLEARINGHOUSEhttp://ciwr.ucanr.edu/California_Drought_Expertise/
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DWR Project “Updating Drought Management Information”
Rationale: a) Drought cannot be considered as “unexpected” b) Increase in frequency and severity in years to come
Objectives: #) Updating information on drought management#) Disseminating updated information to large audience
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78 + FACT SHEETS (’70s & ’90s) ON WATER MANAGEMENT UNDER
DROUGHT
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N. TITLE1 Citrus irrigation scheduling during a drought2 Leaching under saline shallow water tables3 Managing rootzone salinity in a drought year4 Managing irrigation in nut trees during drought5 Managing irrigation in fruit trees during drought6 Rational early season drought planning for Almond growers7 Drought irrigation strategies for deciduous orchards8 The use of treated waste water9 Field use of soil moisture sensors
10 Managing turfgrasses during drought11 Furrow irrigation12 Scheduling of surface-irrigated crops during a drought13 Leaching14 Drought strategies for wine grapes15 Crop salinity tolerance16 Water quality guidelines for vegetables and row crops17 Water quality guidelines for trees and vines18 Drought tips for vegetable and field crop production19 Drought strategies for feeding beef cattle and sheep20 Managing livestock nutrition during drought21 Coping with declining groundwater levels22 Cost comparisons between electric motors & engines for irrigation pumping23 Reuse of Saline and Drainage Water for Irrigation
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http://ucanr.edu/insights
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ARE WE DOING ENOUGH?
WHAT’S NEXT?
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MOVE FORWARD TO A DROUGHT-PREPAREDNESS INITIATIVE??
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THANK YOU!