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Journal of Environmental Hydrology
ISSN 1058-3912 |
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Electronic Journal of the International Association for
Environmental Hydrology
JEH Volume 18 (2010), Paper 23 Posted December 8, 2010 INVESTIGATION OF DOMINANT DISCHARGE TRENDS IN THE GORGANROD WATERSHED, IRAN
M. Habibnejad ABSTRACT For the Gorganrod watershed, Iran, a tributary of the Caspian Sea, dominant discharge is important for calculation of suspended load values, design of hydraulic structures and determination of river optimal width. It is necessary to determine effective and bankful discharge, and the mean annual flood. The total suspended sediment curve is obtained using the suspended sediment curve and the histogram of daily output where the exponent is effective discharge. A value of bankful discharge is determined using sections of river width and finding the minimum surface width ratio. Statistics of river flooding in the Gorganrod were used to determine annual flood average. Since discharge was small in the 2.33-yr return period and its frequency was high, the discharge was not effective in transferring sediment. Effective discharge is introduced as the river dominant discharge that has sediment carrying capacity over the long term. Reference: Habibnejad, M., K. Solaimani, M. Zareii, and A. Azmoodeh. 2010. TInvestigation of dominant discharge trends in the Gorganrod Watershed, Iran. Journal of Environmental Hydrology, Vol. 18, Paper 23. CONTACT: Karim Soleimani University of Agriculture & Nat Res of Sari P.O. Box 737 Sari Iran E-mail: solaimani2001@yahoo.co.uk |
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