WIT Press


Hydrologic Modelling On A Catchment Scale Using GIS And Remote Sensed Land Use Information

Price

Free (open access)

Paper DOI

10.2495/RISK000281

Volume

45

Pages

10

Published

2000

Size

1,018 kb

Author(s)

F. De Smedt, L. Yongbo and S. Gebremeskel

Abstract

A spatially distributed hydrologic model is presented for simulation of runoff in a river basin. The generation of runoff is triggered by the rain intensity and soil moisture status, and is calculated as the net precipitation times a runoff coefficient, which depends upon slope, land use and soil type. The runoff is routed through the basin along flow paths determined by the topography using a diffusive wave transfer model, that enables to calculate response functions between any start and end point, depending upon slope, flow velocity and dissipation characteristics along the flow lines. All these calculations can be performed with standard GIS tools. The model is tested on a catchment in Belgium for which topography and soil data are availabl

Keywords