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Comparison of SCS-CN Determination Methodologies in a Heterogeneous Catchment

Journal of Mountain Science 2015年第5期12卷 1084-1094页

作者： Andrzej WALEGA Boguslaw MICHALEC Agnieszka CUPAK Magdalena GRZEBINOGA Department of Sanitary Engineering and Water Management Faculty of Environmental Engineering and Land SurveyingUniversity of Agriculture in KrakowMickiewicza Avenue 24/2830-059 KrakowPoland Department of Water Engineering and Geotechnics Faculty of Environmental Engineering and Land SurveyingUniversity of Agriculture in KrakowMickiewicza Avenue 24/2830-059 KrakowPoland MGGP Stock Company Lea Avenue 11230-133 Krakow Poland

The aim of this study was to assess the runoff amount from a catchment characterized by diverse land uses by using the Soil Conservation Service Curve Number(SCS-CN) method based on Curve Number(CN) defined for dominant homogeneous elementary *** calculations employed the SCS-CN method,involving the division of the catchment in two homogeneous parts and determining the runoff *** obtained results were compared with the results provided by three other CN determination methods,*** Hawkins function,the kinetics equation,and a complementary error function *** catchment is located in a mountain dominated by forest land *** CN-Precipitation(CN_(emp)-P) data pairs were analyzed using the mentioned methods,and the highest quality score was achieved from model *** results suggest that dividing a catchment into two homogeneous areas and determining their separate CN parameters,used later on to calculate the runoff by means of the presented approach,could be an alternative to the standard *** described method is relatively easy,and as it does not require an adoption of numerous parameters,and it can be employed for designing hydraulic facilities.

关键词： asymptotic functions Curve Numberparameter Homogenous sub catchment Land cover Lumped model

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