State Water Resources Research Institute Program

Project ID: 2007TX270B
Title: Development of an algorithm to create repository of soil moisture and evapotranspiration maps for the State of Texas
Project Type: Research
Start Date: 3/01/2007
End Date: 2/29/2008
Congressional District: 17
Focus Categories: Models, Hydrology, Management and Planning
Keywords: soil moisture, SVAT, SWAP, evapotranspiration, Nexrad, Hydrologic modeling
Principal Investigators: Das, Narendra N; Mohanty, Binayak
Federal Funds: $ 4,890
Non-Federal Matching Funds: $ 10,262
Abstract: Soil moisture and evapotranspiration are vital state variables used as initialhoundary conditions which influence many hydrological, weather and climate related processes. In the state of Texas, federal research organizations and water-borne environmental industries use various hydrological models. Providing better quality surface and subsurface soil moisture, and evapotranspiration fluxes as initialhoundary conditions will improve the efficacy and accuracy of the forecast from hydrologic models. Hence, it is proposed to establish a repository of soil moisture/evapotranspiration data for the state of Texas in TWRI. The state and evolution of soil moisture and evapotranspiration are primarily forced by precipitation which is the major source of space and time variability in the hydrologic cycle. For this study Nexrad-based precipitation of resolution 4000 m X 4000 m will be used as the basis for grid-based distributed l-D processbased hydrological modeling. Spatial (resolution: 4000 m X 4000 m) and temporal (resolution: daily) extent of soil moisture and evapotranspiration mean and standard deviation for the state of Texas from the year 2003 and onwards is expected fiom this work.

Progress/Completion Report, PDF

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