Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Journal of Applied Sciences
  Year: 2009 | Volume: 9 | Issue: 1 | Page No.: 105-112
DOI: 10.3923/jas.2009.105.112
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

An Investigation of Efficiency of Outlet Runoff Assessment Models: Navroud Watershed, Iran

H. Mojaddadi, M. Habibnejad, K. Solaimani, M. Z. Ahmadi and M. A. Hadian-Amri

Abstract:
This research has been carried out for investigation and comparison of the amount of precision and correctness of SCS unit hydrograph, GRAY, G.I.U.H and Gc.I.U.H models in determination of the shape and dimensions of outlet runoff hydrograph in Navroud watershed with 266 km2 area, located in Giulan Province of Iran and use of these models for the similar watersheds and without any data. To investigate the amount of efficiency of above-mentioned methods, first 6 equivalent rainfall-runoff events were selected and for each, hydrograph of outlet runoff were calculated. Then the models were compared with together, for peak time, base time, peak flow and volume of outlet runoff and the most efficient model in estimation of hydrograph of outlet flow for similar regions was proposed. Comparison of calculated hydrographs obtained from models under research and observed hydrographs of selected events showed that SCS unit hydrograph method had the most direct agreement in three parameters of peak time, base time and volume of direct runoff. On the other hand, the geomorphoclimatic instantaneous unit hydrograph, with the highest mean relative error of 16%, had highest harmony in estimation of peak flow direct runoff.
PDF Fulltext XML References Citation Report Citation
How to cite this article:

H. Mojaddadi, M. Habibnejad, K. Solaimani, M. Z. Ahmadi and M. A. Hadian-Amri, 2009. An Investigation of Efficiency of Outlet Runoff Assessment Models: Navroud Watershed, Iran. Journal of Applied Sciences, 9: 105-112.

DOI: 10.3923/jas.2009.105.112

URL: https://scialert.net/abstract/?doi=jas.2009.105.112

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

Curve Bottom