Chapter 2 Regional Summaries - Texas Water Development Board

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FIGURE O.1. LLANO ESTACADO (O) REGIONAL WATER PLANNING AREA. Deaf Smith Prairie Dog Town Fork of the Red River Parmer Castro Swisher Briscoe Bailey Lamb Hale Floyd Motley Cochran Hockley Lubbock Crosby Dickens Region O Yoakum Terry Lynn Garza Major Rivers Cities Existing Reservoirs Ogallala Aquifer Seymour Aquifer Gaines Dawson Colorado River Blaine Aquifer* Dockum Aquifer* Edwards - Trinity (High Plains) Aquifer* Region O Major Rivers Cities Existing Reservoirs * Minor aquifer (only shown where there is no major aquifer) Ogallala Aquifer Seymour Aquifer Blaine Aquifer* Dockum Aquifer* Edwards - Trinity (High Plains) Aquifer* * Minor aquifer (only shown where there is no major aquifer) WAT E R FOR TEXAS 2012 STATE WATER PLAN 117 Chapter 2: llano estacado (0) region summary
POPULATION AND WATER DEMANDS Approximately 2 percent of the state’s total population resided in the Llano Estacado Region in 2010, and by the year 2060 is projected to increase 12 percent (Table O.1). The region’s water demands, however, will decrease. By 2060, the total water demands for the region are projected to decrease 15 percent because of declining irrigation water demands (Table O.1). Irrigation demand is projected to decline 17 percent by 2060 due to declining well yields and increased irrigation efficiencies. Municipal water use, however, increases 7 percent by 2060 (Table O.1, Figure O.2). EXISTING WATER SUPPLIES The Llano Estacado Planning Region depends primarily upon groundwater from the Ogallala Aquifer, with 97 percent of the region’s supply in 2010 coming from this source. Approximately 94 percent of the water obtained from the aquifer is used for irrigation purposes. Other aquifers in the region (Seymour, Dockum, and Edwards- Trinity [High Plains]) constitute less than 1 percent of the supply. Surface water is supplied by White River Lake and Lake Meredith. Of these reservoirs, Lake Meredith, operated by the Canadian River Municipal Water Authority in the Panhandle Region, is the largest contributor. By 2060, the total surface water and groundwater supply is projected to decline 56 percent (Table O.1, Figure O.2). This projected decline in water supply is due to the managed depletion of the Ogallala Aquifer. NEEDS During times of drought, increased demands require pumping that exceeds the capacity of the Ogallala Aquifer, resulting in water needs occurring across the region as early as 2010. The needs for the Llano Estacado Region are projected to increase 86 percent by 2060 (Table O.1, Figure O.2). The plan identifies needs for irrigation of 1,264,707 acre-feet in 2010 and 2,318,004 acre-feet in 2060. Municipal needs also increase significantly, to 30,458 acre-feet in 2060. RECOMMENDED WATER MANAGEMENT STRATEGIES AND COST The Llano Estacado Planning Group recommended a variety of water management strategies, providing 395,957 acre-feet of additional water supply by the year 2060 (Figures O.3 and O.4) at a total capital cost of $1.1 billion (Appendix A). The primary recommended water management strategy for the region is irrigation water conservation, which generates 72 percent of the volume of water from strategies in 2060, based on approximately 786,000 acres of irrigated crop land that did not have efficient irrigation systems. Unmet irrigation needs (2,043,247 acre-feet) remain in 21 counties in the region in 2060, because there were no economically feasible strategies identified to meet their needs. 118 Chapter 2: llano estacado (0) region summary WAT E R FOR TEXAS 2012 STATE WATER PLAN
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Chapter 2 Regional Summaries - Texas Water Development Board

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