Texas Department of Transportation (TxDOT) Water Resources Modeling Using GIS 2000 - Austin, Texas. CRWR-PrePro Stream and Watershed Delineation. Francisco Olivera, Ph.D. Center for Research in Water Resources University of Texas at Austin. What is CRWR-PrePro?.
Digital Spatial Data
Data for HEC-HMS Input Components
(Not all HMS options are included yet)
Definition of the analysis time window.
BasinDefinition of the hydrologic elements.
Definition of rainfall data in time and space.
DigitizedStream Network[Line Coverage]
Raster to VectorConversion
AutomaticCells draining more area than a user-defined threshold value.
InteractiveCells located downstream of user-identified cells.
Stream Network[Grid]Stream Network Definition
InteractiveUser-identified cells[outlets, reservoirs, control points, etc.]
Watershed Outlets[Grid]Watershed Outlet Definition