Keywords
spatial variability, scale, rainfall-runoff modelling, semi-distributed scheme, flood forecasting
Start Date
1-7-2008 12:00 AM
Abstract
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.
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.
