The Catchment Response Through A Multiple Flow Direction Approach

The runoff production in a catchment, even if produced by several phenomena, can be due to two quite distinct mechanisms: infiltration excess and saturation excess. According to the latter, the influence of topography and soil on runoff production has been incorporated in the topographic index, whic...

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Bibliographic Details
Published in:WIT Transactions on Ecology and the Environment 1994-01, Vol.7
Main Authors: Colosimo, C, Mendicino, G
Format: Article
Language:English
Subjects:
Catchments
Elevation
Flow
Gravity
Hydrologic models
Hydrology
Infiltration
Runoff
Saturation
Surface flow
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Summary:The runoff production in a catchment, even if produced by several phenomena, can be due to two quite distinct mechanisms: infiltration excess and saturation excess. According to the latter, the influence of topography and soil on runoff production has been incorporated in the topographic index, which reflects the tendency of water to accumulate at any point in the catchment and the tendency of gravitational forces to move that water downslope. The numerical value of such an index, based on surface flow pathway analysis using gridded elevation data, can vary according to the use of a single flow direction or a multiple flow direction approach. In this paper, by means of a spatially distributed hydrological model capable of modeling both infiltration excess and saturation excess runo
ISSN:1746-448X
1743-3541
DOI:10.2495/HY940181