Distributed catchment simulation using a raster GIS

نویسندگانSaghafian, B - Van Lieshout, A.M - Rajaie, H.M
نشریهInternational Journal of Applied Earth Observation and Geoinformation
ارائه به نام دانشگاهSoil Conservation & Watershed Management Institute, Tehran, Iran
شماره صفحات199-203
شماره مجلد2
ضریب تاثیر (IF)4.003
نوع مقالهFull Paper
تاریخ انتشار2000
رتبه نشریهISI
نوع نشریهچاپی
کشور محل چاپهلند

چکیده مقاله

Hydrologic simulation models can greatly benefit from geographic information system (GIS) capabilities for manipulation of input/output spatial data. This paper describes GIS-based pre-processing algorithms operating on elevation data that are applied in order to obtain flow direction and flow accumulation maps. Using the derived maps and other physical input data, kinematic travel-time maps, time-area histograms, and partial and total runoff hydrographs can be generated in a distributed modelling framework. The model was tested on a small watershed with satisfactory results. In its present state, the proposed model appears to work best for steep ungauged watersheds. Further validation for larger catchments requires more research. Some enhancements to the model are also recommended.

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