1. ARIZONA WATER ATLAS & WATER USE DATA Linda Stitzer Arizona Department of Water Resources lsstitzer@azwater.gov 602-686-0035

2. Arizona Water Atlas Purpose Assist local and regional planning efforts by providing water resource data and information Assist local and regional planning efforts by providing water resource data and information Provide compiled information and data at one location from many data sources at the planning area, groundwater basin and community level Provide compiled information and data at one location from many data sources at the planning area, groundwater basin and community level Provide general public information Provide general public information

3. Arizona Planning Areas “Planning Area” “Planning Area” concept that provides a regional perspective on water resources and issues concept that provides a regional perspective on water resources and issues Composed of 51 groundwater basins Composed of 51 groundwater basins Active Management Areas (AMAs) Active Management Areas (AMAs) Central Highlands Central Highlands Eastern Plateau Eastern Plateau Lower Colorado River Lower Colorado River Southeastern Arizona Southeastern Arizona Upper Colorado River Upper Colorado River Western Plateau Western Plateau

4. Atlas Organization & Status Volumes 2-8 Planning Areas final and posted on web (web-format) Volume 1 Executive Summary Statewide overview, important summary information, background, data sources and methods Statewide overview, important summary information, background, data sources and methods August 2010 August 2010

5. Atlas Volume 9 Resource Sustainability Assessment - 7/2011 Resource Sustainability Assessment - 7/2011  Interpret and evaluate Atlas findings to support water management decision processes  Evaluate supply vulnerability to determine resource sustainability e.g.  Limited physical supplies  Current or projected demand exceed supplies  Supply sensitivity to drought or other shortage  Competition with environmental demands or potential for impact  Legal issues

6. Volume 9 – Sustainability Assessment  Identify water supply vulnerability basin by basin and by demand centers (not individual communities)  Qualitative and quantitative metrics  Vulnerability ranking will be used to determine whether supplies are sustainable in the short- term and long-term 25, 50 and 100 years  100 year population and demand projections by basin  Targeted stakeholder input  WIFA grant

7. Volume 9 – Sustainability Assessment  Integrate regional/local water planning studies  e.g. USBOR appraisal studies  North Central Arizona  Mogollon Highlands  Sierra Vista Subwatershed  Verde Highlands  Water Supply and demand projections; alternatives to meet “unmet demands”  e.g. Colorado River Basin Study  Complex water supply and demand projections to 2060 for areas either currently using or anticipated to need Colorado River water supplies

8. Colorado River Basin Water Supply 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 2010-2060 Arizona Focus: M&I water demand 2010-2060 CAP service area + on-River + North Central Arizona, Yavapai Highlands, Sierra Vista Subwatershed CAP service area + on-River + North Central Arizona, Yavapai Highlands, Sierra Vista Subwatershed Estimate magnitude of unmet Colorado River water demand (550,000-600,000 acre-feet) Estimate magnitude of unmet Colorado River water demand (550,000-600,000 acre-feet) Demand Study Tool (Ecosystem Economics) Demand Study Tool (Ecosystem Economics)

9. Planning Area Volumes Content Overview of entire planning area Geography Hydrology Climate Environmental Conditions instream flow claims, ESA, WPF, protected areas Population, Growth and Water Use Water Supply Cultural Water Demand Sector/Community/Site Water Resource Issues

10. Planning Area Volume Content Detailed Basin water resource characteristics: maps, tables Detailed Basin water resource characteristics: maps, tables Geography Geography Land Ownership Land Ownership Climate Climate Surface Water Conditions Surface Water Conditions Streamflow, reservoir data, etc. Streamflow, reservoir data, etc. Perennial/Intermittent Streams and Major Springs Perennial/Intermittent Streams and Major Springs Groundwater Conditions Groundwater Conditions Major aquifers, recharge, flow direction, well yields, water levels and water level changes, selected hydrographs Major aquifers, recharge, flow direction, well yields, water levels and water level changes, selected hydrographs

11. Planning Area Volume Content Basins (cont.) Water Quality Water Quality Sites with Drinking Water Standards exceedences Sites with Drinking Water Standards exceedences Impaired lakes and streams and effluent dependent reaches Impaired lakes and streams and effluent dependent reaches Contamination sites (WQARF, VRP, Superfund, RCRA, DOD) Contamination sites (WQARF, VRP, Superfund, RCRA, DOD) Cultural Water Demands Cultural Water Demands Population (1980-2030) Population (1980-2030) Water use sector demand (1971-2005) Water use sector demand (1971-2005) Effluent generation and disposal Effluent generation and disposal (Riparian/environmental demand unable to quantify) Water Adequacy/Assured Water Supply Determinations Water Adequacy/Assured Water Supply Determinations Subdivisions, # of lots, etc. Subdivisions, # of lots, etc.

12. Arizona Water Atlas Data Sources Over 60 data sources Over 60 data sources Cultural demand data sources include: Cultural demand data sources include: USGS Water Use Contract USGS Water Use Contract Annual municipal, industrial and agricultural use by basin Annual municipal, industrial and agricultural use by basin Hydrologic and Planning Studies Hydrologic and Planning Studies USGS, USBOR, ADWR, consultants USGS, USBOR, ADWR, consultants Arizona Drought Preparedness Plan (2004) Arizona Drought Preparedness Plan (2004) CWS annual water use reports and water resource plans (2007) CWS annual water use reports and water resource plans (2007)

13. Arizona Water Atlas Data Sources (cont.) AMA Assessments AMA Assessments Fourth Management Plan Precursor; Annual Reports and AWS Designations data Fourth Management Plan Precursor; Annual Reports and AWS Designations data Wastewater Data Wastewater Data Clean Water Needs Survey – WIFA Clean Water Needs Survey – WIFA ADEQ files ADEQ files EPA EPA

14. Arizona Water Supply & Demand Arizona Water Supply & Demand 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 environmental demands on the Colorado River (approximately 0.02 Maf) Agricultural 4.7, 71% Municipal 1.5, 23% Industrial 0.4, 6% Groundwater 2.99

15. Supply/Demand v. Supply Availability Colorado River entitlements, CAP contracts, decrees, settlements, groundwater rights, assured and adequate water supply determinations set legal limits on physically available water supplies Colorado River entitlements, CAP contracts, decrees, settlements, groundwater rights, assured and adequate water supply determinations set legal limits on physically available water supplies Available Groundwater Available Groundwater Limited water budgets; quantified deficits Limited water budgets; quantified deficits Recharge, storage data Recharge, storage data Effluent Effluent Generation v. potential for reuse Generation v. potential for reuse Available v. Sustainable supplies Available v. Sustainable supplies

16. Planning Area Water Demand (2001-2005)

18. Planning Area Water Supplies as a Percentage of Demand

19. Water Providers in the Little Colorado River Plateau Basin serving 450 acre-feet or more water per year in 2006

20. SE AZ Agricultural Irrigation (USGS, 2007) BasinWillcoxSaffordDouglasDuncan Upper San Pedro Lower San Pedro 2007 Irrigated Acreage50,600 acres41,300 acres13,150 acres3,450 acres1,000 acres600 acres Crop Type Corn 38%<1%52%15%1%NA Cotton 2%58%1%6%NA38% Orchard 10%9%10%NA15%NA Pasture (Alfalfa, Hay) 28%29%27%54%78%54% Sorghum 3%<1%2%24%NA8% Vegetables 10%1%7%NA Wheat 1%2%NA1%NA Other 8%<1%1%NA6%NA Irrigation Type Center Pivot 79%21%85%2% 17% Flood 16%74%6%98%63%33% Drip 2%3%8%NA25%33% Sprinkler 3%2%1%NA10%17%

21. Effluent use by reporting facilities (c. 2006) Planning Area Volume Generated (af) Direct Use (af) Permitted Recharge Storage (af) Created Wetland Delivery (af) Disposal (af) Eastern Plateau36,10014,90002,70018,500 Southeastern Arizona10,6001,6702,00006,930 Upper Colorado River8,7003,400005,300 Central Highlands9,3001,2003004267,374 Western Plateau2,200300001,900 Lower Colorado River16,7001,6000015,100 Active Management Areas419,346200,70034,0001,350183,296 Arizona Total502,946223,77036,3004,476238,400

22. Percentage of Effluent Use by Type

23. Closing thoughts Considerable existing current and projected population and demand data at the groundwater basin, local and regional level Considerable existing current and projected population and demand data at the groundwater basin, local and regional level Projection uncertainty; Volume 9 will project groundwater basin population and demand to 2110 (3-6 month deadline) Projection uncertainty; Volume 9 will project groundwater basin population and demand to 2110 (3-6 month deadline) Water for the environment Water for the environment