CRWR Online Report 2003-3

 
 

WRAPHydro Data Model: Finding Input Parameters for the

Water Rights Analysis Package

By Hema Gopalan, M.S.E. and David R. Maidment

ABSTRACT

The Water Availability Model requires geospatial parameters to be used as inputs into the WRAP model. Previously these parameters were developed in ArcView 3.2 and processing suffered from performance and data management issues. This thesis presents a new hydro data model - WRAP Hydro developed specifically for the WRAP project. A new method of determining watershed parameters for the Guadalupe basin using the Arc Hydro and WRAP Hydro toolsets is discussed. The parameter processing is done in three stages, getting base data, preprocessing and the actual processing. This provides a systematic and structured approach to determine watershed parameters. This work also validates the division of a basin into sub basins for a more efficient processing of parameters. It is found that both these methods give identical results. The values obtained by these two methods for upstream area for each control point were compared with the USGS area values and it was observed that they matched well. The process of finding parameters when new stream segments and control points are added without having to redo the whole process again is also discussed in the thesis. The WRAP Hydro toolset provides functions that help to add and remove control points from the network. It is also possible to incorporate a new stream edit without having to process the grids for the whole basin again.

CRWR Online Report 2003-3

 

WRAPHydro Data Model: Finding Input Parameters for the

Water Rights Analysis Package

By Hema Gopalan, M.S.E. and David R. Maidment

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