Assessment of runoff contributing catchment areas in rainfall runoff modelling

S. Thorndahl, C. Johansen & K. Schaarup-Jensen
In numerical modelling of rainfall caused runoff in urban sewer systems an essential parameter is the hydrological reduction factor which defines the percentage of the impervious area contributing to the surface flow towards the sewer. As the hydrological processes during a rainfall are difficult to determine with significant precision the hydrological reduction factor is implemented to account all hydrological losses except the initial loss. This paper presents an inconsistency between calculations of the hydrological reduction...

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Assessment of runoff contributing catchment areas in rainfall runoff modelling

S. Thorndahl, C. Johansen & K. Schaarup-Jensen
In numerical modelling of rainfall caused runoff in urban sewer systems an essential parameter is the hydrological reduction factor which defines the percentage of the impervious area contributing to the surface flow towards the sewer. As the hydrological processes during a rainfall are difficult to determine with significant precision the hydrological reduction factor is implemented to account all hydrological losses except the initial loss. This paper presents an inconsistency between calculations of the hydrological reduction...

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Publication Year

  • 2005
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