ABSTRACT
ABSTRACT: Flood forecasting has proved to be an effective and helpful non-structure method which can effectively reduce the impact of floods by providing early warnings ahead of time. Among many flood forecasting models, Rainfall-Runoff Correlation Diagram (RRCD) gives more accurate prediction by making use of large amount of history data and acting as experience expect, and thus is widely applied in operational flood forecasting. This paper proposed a new method to draw the RRCD through an equation instead of subjectivity. The method is then applied to Zhang River Reservoir with 126 flood events from historical meteorological and hydrological data from 1971 to 2000. Results show that this method gives performance as good as experience in more objective aspect and can be easily applied to consider the influence of rainfall hours cast on RRCD.
