WIT Press


A Procedure To Define The Optimal Grid Size For The Exhaustive Extraction Of Hydrologic Watershed Drainage Features From A Digital Elevation Model Using A Raster Geographic Information System

Price

Free (open access)

Paper DOI

10.2495/MIS000211

Volume

24

Pages

10

Published

2000

Size

939 kb

Author(s)

D. Cluis, E. Quentin & G. Benie

Abstract

To study the fate of non-point source pollution and other spatial environmental management problems, it is very convenient to generate and to exploit a synthetic representation of the watershed describing the terrestrial and riverine transportation paths of water and contaminants under the action of gravity within a watershed. In raster mode, a drainage algorithm called D8 is often used to identify the flow direction (aspect) from each cell to one of the eight adjacent ones according to the steepest elevation gradient and then to generate the flow accumulation defining a synthetic hydrographic network. Given a specific digital elevation model (DEM), two parameters need to b

Keywords