DS-777 Average Annual Irrigation Withdrawals, 2000 to 2009, in inches, estimated from the Soil WATer (SOWAT) Balance Model for the High Plains Aquifer in Parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming

The water-budget components geodatabase contains selected data from maps in the, "Selected Approaches to Estimate Water-Budget Components of the High Plains, 1940 through 1949 and 2000 through 2009" report (Stanton and others, 2011). Data were collected and synthesized from existing climate models including the Parameter-Elevation Regressions on Independent Slopes Model (PRISM) (Daly and others, 1994), and the Snow accumulation and ablation model (SNOW-17) (Anderson, 2006), and used in soil-water balance models to compute various components of a water budget. The methodologies used to compute the averages and volumes for the data in this geodatabase are slightly different for different components and models.本水平衡组分地理数据库（water-budget components geodatabase）收录了来自《1940-1949年及2000-2009年高平原水平衡组分估算方法选介》报告（Stanton等，2011）的精选地图数据。本数据集采集并整合了现有气候模型的相关数据，包括独立坡地参数高程回归模型（Parameter-Elevation Regressions on Independent Slopes Model，PRISM）（Daly等，1994）以及积雪积累与消融模型（Snow accumulation and ablation model，SNOW-17）（Anderson，2006），并将其应用于土壤水平衡模型以计算水平衡的各类组分。针对本地理数据库中不同组分与模型，其均值与水量的计算方法存在细微差异。