The Use of Distributed Rainfall-Runoff Models Based on GIS at Different Scales of Information

by A. Brath, Univ of Basilicata, Italy,
P. La Barbera, Univ of Basilicata, Italy,
M. Mancini, Univ of Basilicata, Italy,
R. Rosso, Univ of Basilicata, Italy,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


The effects of spatial variability of soil type and land use on basin response are investigated. This is modelled thorugh a distributed approach specifically designed for calibration from GIS describing soil type, land use and topography. Increasing scale of aggregation of absorption model results in smoothing flood hydrograph and underestimating flood volume. This result emphasizes the major role of scale effects in distributed modelling.

Subject Headings: Scale models | Rainfall-runoff relationships | Geographic information systems | Mathematical models | Hydrologic models | Floods | Land use | Computer models

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