Evaluation of Watershed Management on Flood Forecast Lead Time in Golabdare-Darband Basin

Subject Areas : environmental management

Mohammad Ebrahim Banihabib ¹ , Azar Arabi ²

1 -
2 -

Received: 2013-01-28 Accepted : 2013-01-28 Published : 2013-01-28

Keywords: forecast lead time, watershed management, Golabdare-Darband, HEC-HMS model, Flood control,

Abstract :

Main purpose of this research is estimating the effect of watershed management on flood forecast lead time in Golabdare-Darband basin using HEC-HMS Model. The model was calibrated and validated for Golabdare-Darband basin before and after watershed management using four flood events.  Floods of the basin are simulated in different return periods in both conditions of before and after watershed management. The Threshold of flood warning was estimated using 25-year flood peak. Results of this research show that the change of land use caused by watershed management, increases flood lead time and increasing return periods causes lead time reduction from 11 minutes to 15 minutes (26% incensement).