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Evaluation of precipitation predictions in a regional climate simulation

By K.R. Costigan, J.E. Bossert and D.L. Langely

Abstract

The research reported here is part of a larger project that is coupling a suite of environmental models to simulate the hydrologic cycle within river basins (Bossert et al., 1999). These models include the Regional Atmospheric Modeling System (RAMS), which provides meteorological variables and precipitation to the Simulator for Processes of Landscapes, Surface/Subsurface Hydrology (SPLASH). SPLASH partitions precipitation into evaporation, transpiration, soil water storage, surface runoff, and subsurface recharge. The runoff is collected within a simple river channel model and the Finite element Heat and Mass (FEHM) subsurface model is linked to the land surface and river flow model components to simulate saturated and unsaturated flow and changes in aquifer levels. The goal is to produce a fully interactive system of atmospheric, surface hydrology, river and groundwater models to allow water and energy feedbacks throughout the system. This paper focuses on the evaluation of the precipitation fields predicted by the RAMS model at different times during the 1992--1993 water year in the Rio Grande basin. The evaluation includes comparing the model predictions to the observed precipitation as reported by Cooperative Summary of the Day and SNOTEL reporting stations

Topics: Precipitation, 99 General And Miscellaneous//Mathematics, Computing, And Information Science, Hydrology, Evaporation, Soils, Rivers, Transpiration, Simulators, Water, Climates, Simulation, Runoff, Flow Models, Aquifers, Evaluation, 54 Environmental Sciences
Publisher: Los Alamos National Laboratory
Year: 1998
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Provided by: UNT Digital Library
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