Keywords

spatial variability, scale, rainfall-runoff modelling, semi-distributed scheme, flood forecasting

Start Date

1-7-2008 12:00 AM

Description

The influence of spatial variability of rainfall and soil/land use on the accuracy of runoff simulation was investigated in order to define the optimal spatial discretization of the basin to be adopted in rainfall-runoff modeling. In particular, the effects of a uniform versus distributed spatial representation of both rainfall field and basin properties was analyzed by using a semi-distributed model. These effects were evaluated by comparing the observed and simulated flood hydrographs for different sub-basins of the Upper Tiber River basin at Ponte Felcino river section (drainage area of ~1800 km2), located in Central Italy. On the basis of the obtained results, a dimension of about 300 km2 for the homogeneous elements of the basin can be considered adequate for model applications addressed to flood forecasting and warning activities.

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Jul 1st, 12:00 AM

Effects of Rainfall and Soil/Land Use Spatial Distribution on Hydrological Response at Different Scales

The influence of spatial variability of rainfall and soil/land use on the accuracy of runoff simulation was investigated in order to define the optimal spatial discretization of the basin to be adopted in rainfall-runoff modeling. In particular, the effects of a uniform versus distributed spatial representation of both rainfall field and basin properties was analyzed by using a semi-distributed model. These effects were evaluated by comparing the observed and simulated flood hydrographs for different sub-basins of the Upper Tiber River basin at Ponte Felcino river section (drainage area of ~1800 km2), located in Central Italy. On the basis of the obtained results, a dimension of about 300 km2 for the homogeneous elements of the basin can be considered adequate for model applications addressed to flood forecasting and warning activities.