Comparison of Different Aggregation Methods in Coupling of the Numerical Precipitation Forecasting and Hydrological Forecasting

The coupling of the numerical precipitation forecasting and the hydrological forecasting model is one of the methods to prolong the forecast period. It is a question that how to coupling the numerical grid precipitation with the traditional hydrological forecasting model, because different data processing methods will affect the forecast accuracy. Currently, the lumped precipitation data is used in the hydrological forecasting model. Aggregation method is used to coupling the numerical precipitation forecasting and the traditional hydrological model in this paper. The affections of four different aggregation methods are compared. The best method is inverse distance weighting method in Theissen Polygon. (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Society for Resources, Environment and Engineering