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1987•JAWRA Journal of the American Water Resources AssociationRequires access

APPLICATION OF RORB MODEL TO A CATCHMENT IN SINGAPORE1

S. Selvalingam, S. Y. Liong, P Manoharan

Open publisher page 7 citations

Abstract

ABSTRACT: Runoff Routing model (RORB) is a general model applicable to both rural and urban catchments. The performance of the model is illustrated through its simulation of flood runoff hydrographs in an urban catchment in Singapore. The essential feature of the model is the routing of rainfall excesses on subareas through some arrangement of concentrated storage elements, which represent the distribution of temporary storage of flood runoff on the watershed. This nonlinear routing procedure of the storage elements has two common parameters, kc and m. With the limited data available, these two parameter values were determined through calibration runs. The same set of values of kc and m were then used in the model to determine the runoff hydrographs of five other storms selected from the rainfall events between 1979 and 1981. It was found that the simulated runoff hydrographs matched reasonably well with the recorded hydrographs.

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ABSTRACT: Runoff Routing model (RORB) is a general model applicable to both rural and urban catchments. The performance of the model is illustrated through its simulation of flood runoff hydrographs in an urban catchment in Singapore. The essential feature of the model is the routing of rainfall excesses on subareas through some arrangement of concentrated storage elements, which represent the distribution of temporary storage of flood runoff on the watershed. This nonlinear routing procedure of the storage elements has two common parameters, kc and m. With the limited data available, these two parameter values were determined through calibration runs. The same set of values of kc and m were then used in the model to determine the runoff hydrographs of five other storms selected from the rainfall events between 1979 and 1981. It was found that the simulated runoff hydrographs matched reasonably well with the recorded hydrographs.

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Available abstract

ABSTRACT: Runoff Routing model (RORB) is a general model applicable to both rural and urban catchments. The performance of the model is illustrated through its simulation of flood runoff hydrographs in an urban catchment in Singapore. The essential feature of the model is the routing of rainfall excesses on subareas through some arrangement of concentrated storage elements, which represent the distribution of temporary storage of flood runoff on the watershed. This nonlinear routing procedure of the storage elements has two common parameters, kc and m. With the limited data available, these two parameter values were determined through calibration runs. The same set of values of kc and m were then used in the model to determine the runoff hydrographs of five other storms selected from the rainfall events between 1979 and 1981. It was found that the simulated runoff hydrographs matched reasonably well with the recorded hydrographs.

Key concepts: Hydrograph, Surface runoff, Routing (electronic design automation), Environmental science, Hydrology (agriculture), Runoff model, Flood myth, Watershed

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APPLICATION OF RORB MODEL TO A CATCHMENT IN SINGAPORE1 — Research Paper | ScholarLens