DS-777 Average Annual Precipitation data, 1940 to 1949, in inches estimated from the Parameter-Elevation Regressions on Independent Slopes Model (PRISM) 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《1940-1949年及2000-2009年大平原水平衡组分估算方法选介》（Stanton等，2011）报告中的精选地图数据。数据从现有气候模型中收集整合而来，这些模型包括基于独立斜坡的参数-高程回归模型（Parameter-Elevation Regressions on Independent Slopes Model，PRISM）（Daly等，1994）与积雪积累与消融模型（SNOW-17）（Anderson，2006），并被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的数据，其平均值与总量的计算方法因组分及模型的不同存在细微差异。