Capture mouse clicks on the page.
Human activities introduce even more heterogeneity.
In the Southwest, much of the annual runoff comes from winter snow in the higher elevations, which remains stored in the snowpack until spring melt, and then runs off over a relatively short period of a few weeks. Synthesis of the spatially and temporally distributed water and energy balance, particularly in physically based evaporation, runoff, and snowmelt models. Multi-billion dollar decisions depend on forecasts of water availability and flow. The objective is to develop means to accurately determine the occurrence and spatial distribution of rainfall in semi-arid catchments using satellite data, radar and ground measurements. This subtask will provide critical input to Thrusts 2-4 and will be conducted in close coordination with climate modeling in Thrust 4.