The Pursuit of Sustainable & Reliable Water Supplies in the Desert. The Las Vegas Story
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1 The Pursuit of Sustainable & Reliable Water Supplies in the Desert The Las Vegas Story Richard B. Holmes Southern Nevada Water Authority February 16, 2010
2 SOUTHERN NEVADA
3 Presentation Outline Early Las Vegas Valley: Water Resources Formation of the Southern Nevada Water Authority Water Resource Plans in the 1990 s and early 2000 s Current Realities: Drought, Climate Change, and Sustainability Current Priorities: Conservation, Diversification of Resources and Regional Partnerships Southern Nevada Water Authority s 2009 Water Resource Plan
4 The Rush is Only Just Commencing. Las Vegas Age, May 1905
5 Water Use 1905 Present Over the years, Southern Nevada has become increasingly dependent on Colorado River supplies.
6 Development History Population , , , , , million million
7 Las Vegas Early Settlement Early inhabitants came to Las Vegas because of its abundant water supplies. Pre
8 Las Vegas Early Settlement Even early settlers recognized the value of conservation. Photo courtesy of UNLV Special Collections. Pre
9 Las Vegas A railroad resulted in the formation of the privately owned Las Vegas Land and Water Company. Pre
10 Las Vegas 1920s Nevada received its Colorado River allocation; there was no projected use for this water at the time. WY NM UT Nevada CO AZ CA Pre
11 Las Vegas 1950s Las Vegas gained popularity as a tourist destination. Pre % of all water comes from local groundwater supplies.
12 Las Vegas 1970s Colorado River water delivery facilities became operational. The Colorado River is expected to provide Las Vegas an ample water supply until the middle of the 21 st century. Pre
13 Las Vegas 1990s The Colorado River was estimated to be fully used by the early 2000s. Pre
14 Presentation Outline Early Las Vegas Valley: Water Resources Formation of the Southern Nevada Water Authority Water Resource Plans in the 1990 s and early 2000 s Current Realities: Drought, Climate Change, and Sustainability Current Priorities: Conservation, Diversification of Resources and Regional Partnerships Southern Nevada Water Authority s 2009 Water Resource Plan
15 Las Vegas 1990s Population (in Millions) Major Issues Competition for Colorado River water No coordinated conservation plan Pre
16 Super water agency taking shape. Las Vegas Sun, May 1991
17 Southern Nevada Water Authority Return-Flow Credits CREDIT Southern Nevada s water resources are consumed primarily by landscape and cooling 60% DEBIT Indoor water use has negligible impact
18 Las Vegas 1990s The Southern Nevada Water Authority (SNWA) was formed by cooperative agreement (NRS 277) in 1991 to address Southern Nevada s unique water needs on a regional basis Regional Coordination Regional Facilities Water Conservation
19 Presentation Outline Early Las Vegas Valley: Water Resources Formation of the Southern Nevada Water Authority Water Resource Plans in the 1990 s and early 2000 s Current Realities: Drought, Climate Change, and Sustainability Current Priorities: Conservation, Diversification of Resources and Regional Partnerships Southern Nevada Water Authority s 2009 Water Resource Plan
20 Nevada to be granted surplus river water. Las Vegas Sun, December 2000
21 Las Vegas Early 2000s Water (acre-feet) 800, , , , , , , , Interim Surplus 2000 Resource Plan 4 1. Interim surplus (through 2016) 2. Clark County groundwater 3. Arizona Demonstration Project 4. Arizona Groundwater Bank 5. Las Vegas Valley Existing shallow Resources aquifer 6. Muddy River (Colorado River) 7. Virgin River 8. Southern Nevada Groundwater Bank 9. Colorado River transfers
22 Las Vegas Early 2000s Interim Surplus Intended as a bridge until other long-term resources could be developed. Surplus volumes available based on Lake Mead water levels. Meanwhile, SNWA aggressively pursues other resources: Conservation Water banking Exchanges with other states Desalination
23 Presentation Outline Early Las Vegas Valley: Water Resources Formation of the Southern Nevada Water Authority Water Resource Plans in the 1990 s and early 2000 s Current Realities: Drought, Climate Change, and Sustainability Current Priorities: Conservation, Diversification of Resources and Regional Partnerships Southern Nevada Water Authority s 2009 Water Resource Plan
24 Drought takes hold on the Colorado River Las Vegas Early 2000s
25 Las Vegas Early 2000s Lake Mead water level plunges 1,240 1,200 1,160 1,120 1,
26 Las Vegas Early 2000s Interim Surplus availability becomes uncertain 800, , ,000 Interim Surplus? Water (acre-feet) 500, , , , , Interim surplus (through 2016) 2. Clark County groundwater 3. Arizona Demonstration Project 4. Arizona Groundwater Bank 5. Las Vegas Valley Existing shallow Resources aquifer 6. Muddy River (Colorado River) 7. Virgin River 8. Southern Nevada Groundwater Bank 9. Colorado River transfers
27 COLORADO RIVER DROUGHT 96% Lake Mead,
28 COLORADO RIVER DROUGHT 42% Lake Mead, 2009
29 COLORADO RIVER DROUGHT Normal 105% 102% 88% 80 73% 68% 60 62% 59% 53% 51% % The 10-year historical average inflow to the Colorado River system was 69% of normal.
30 Las Vegas Current Historical and Forecast Lake Mead Elevation 1,225 Top of Spillway End of Month Elevation (feet) 1,175 1,125 1,075 1,025 Shortage Historical Forecast Jul-08 Jan-00 Jan-02 Jan-04 Jan-06 Jan-08 Jan-10 Source: Bureau of Reclamation, December 2007 and July 2008
31 Climate Change in the Colorado River Basin Imminent transition to a more arid climate in southwestern North America Seager et al (April 2007) Climate variability and change, together with increasing development pressures, will result in drought impacts that are beyond the institutional experience in the region Intergovernmental Panel on Climate Change (August 2008)
32 CLIMATE CHANGE The uncertainties posed by climate change will require us to use many of the same tools that have allowed us to successfully address water resource challenges over the last decade. Conservation Innovation Partnerships
33 Presentation Outline Early Las Vegas Valley: Water Resources Formation of the Southern Nevada Water Authority Water Resource Plans in the 1990 s and early 2000 s Current Realities: Drought, Climate Change, and Sustainability Current Priorities: Conservation, Diversification of Resources and Regional Partnerships Southern Nevada Water Authority s 2009 Water Resource Plan
34 LOCAL RESPONSE - CONSERVATION Conservation was Southern Nevada s first response to drought. 2003: Implemented drought plan 2004: Realized 25% conservation goal 2005: Adopted new conservation goal 2008: Realized 250 GPCD goal 2009: Adopted new goal (199 GPCD by 2035) Water consumption decreased by nearly 21 billion gallons between 2002 & 2008, despite a population increase of 400,000 during that span.
35 Las Vegas Early 2000s Drought Plan EDUCATION WATER PRICING REGULATION INCENTIVES 17
36 Las Vegas Early 2000s Conservation Policies and Programs Year-round watering schedules Turf limitations Golf course water budgets Water waste enforcement Conservation rates Education and outreach 18
37 Las Vegas Early 2000s Conservation Policies and Programs Provides rebates to customers that replace turf with water-smart landscaping Nearly 142 million square-feet converted since program inception Over 7.9 billion gallons being saved annually
38 Water Conservation Achievements Gallons Per Capita Per Day (GPCD) Water Usage Previous Goal Attained: 250 GPCD by New Goal: 199 GPCD by
39 Nevada Consumptive Use without Recharge 400, ,000 Water Use (Acre-feet) 300, , , , , , , , , , prelim. Southern Nevada s consumptive water use declined about 26 billion gallons between 2002 and 2009, despite the fact that there were about 400,000 new residents.
40 Current Priorities Resource Diversification Spring Valley Snake Valley Cave Valley Dry Lake Valley Delamar Valley Coyote Spring Valley
41 REGIONAL RESPONSE - INNOVATION The Seven Basin states have worked over the last decade to implement innovative water solutions for the Colorado River. Rules for Surplus Shortage sharing Coordinated management
42 Current Priorities Arizona water bank California water bank Augmentation Study System conservation Tri-state desalination projects Regional Partnerships Bi-National environmental resource management and desalination projects
43 Presentation Outline Early Las Vegas Valley: Water Resources Formation of the Southern Nevada Water Authority Water Resource Plans in the 1990 s and early 2000 s Current Realities: Drought, Climate Change, and Sustainability Current Priorities: Conservation, Diversification of Resources and Regional Partnerships Southern Nevada Water Authority s 2009 Water Resource Plan
44 Water Resource Planning Projected Water Demands
45 Water Resource Planning
46 The face of the new Southwest
47
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