Applicability of TOPMODEL in the Catchments of Nepal: Bagmati River Basin

Autor:	Raghunath Jha, Veer Raghavulu Sapireddy, Byong-Hun Jeon, Reda A.I. Abou-Shanab, Dhruba Bhatta, Abinashi Sigdel
Rok vydání:	2011
Předmět:	Soil map Hydrology geography Environmental Engineering geography.geographical_feature_category Drainage basin Hydrograph Pollution Routing (hydrology) Evapotranspiration Environmental science Spatial variability Surface runoff Waste Management and Disposal Spatial analysis
Zdroj:	Geosystem Engineering. 14:181-190
ISSN:	2166-3394 1226-9328
Popis:	TOPMODEL was applied to simulate runoff hydrograph in Bagmati River Basin. Digital Elevation Model (DEM), soil, land-use and other spatial data were analyzed using Geographic Information System (GIS). To account for spatial variability of precipitation, climate and land-use, the entire basin was divided into sub-basins and the model was run separately. Other additional computer codes have been developed for computing evapotranspiration and channel routing so as to apply TOPMODEL as a complete hydrological model for medium to large basin. Less sensitive or physically based parameters were directly measured from topographic and soil maps using looked up table, where as more sensitive parameters such as saturated transmissivity [ln(T0)] and exponential decay coefficient (m) to each sub-basin were calibrated by manual iterative method. However, subjective and objective methods were applied to test the goodness of fit of simulated hydro- graphs to observed hydrographs. The results are satisfactory wit...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::858b29429a838cb155932c34221931ac https://doi.org/10.1080/12269328.2011.10541349 Zobrazit plný text záznamu