Simulation And Estimation Of Effective Discharge Of Annual Flood (Case Study: Jarahi River, Khuzestan, Iran)
[Full Text]
AUTHOR(S)
Ebrahim Nohani
KEYWORDS
Keywords: bankfull discharge, effective discharge, sediment curve, hydrometric stations
ABSTRACT
ABSTRACT: To calculate the amount of suspended sediment load and designing the hydraulic structures and determination of the optimal width and other hydraulic characteristics of the river, equilibrium flow or in other words, the prevailing flow should be recognized. In the present study, to investigate and recognize the effective discharge of sediment delivery in Jarahi River, three hydrometric stations located on the main branch of the river were selected. To calculate the suspended load in the studied stations, a regression relationship was established between flow rate and sediment discharge (sediment curve). Finally for each of these stations, the rate of effective discharge, dominant discharge and the discharge with a return period of 2.5 years were calculated and compared based on the normal distribution and twoparameter gamma methods. The results showed that the effective discharge rate and bankfull discharge are almost equal in stations and in the absence of data to find effective discharge, the dominant discharge (river design discharge) can be determined by river full section removal.
REFERENCES
[1] Inglis, C.C., 1949. The behavior and control of river and canals, Central Water Power Irrigation and Navigation Research Station, Poona (India), Research Publ. 13.
[2] Benson, M.A, and Thomas, D.M., 1966. A definition of dominant discharge, Hydrological Science Bulletin, 11, pp. 7680.
[3] Pickup, G. and Warner, R.F., 1976. Effect of hydrologic regime on magnitude and frequency of dominant discharge, Journal of Hydrology, 29, pp. 5175.
[4] Andrews, E.D., 1980. Effective and bankfull discharges of streams in Yampariver basin, Colorado and Wyoming, Journal of Hydrology, 46, pp. 311330.
[5] Williams, G.P., 1978. Bankfull discharge of rivers, Water Resources Research, 14, pp. 11411154.
[6] Keshavarzy, A. and Erskine, W.D., 1995. Investigation of Dominant Discharge on South Creek, NSW, Australia. The 2nd International Symposium on Urban Storm Water Management, Melbourne, Australia, pp. 261266.
[7] Erskine, W.D., and Keshavarzy, A., 1996. Frequency of Bankfull Discharge on South and Eastern Creeks, NSW, Australia. 23rd of Hydrology and Water Resources Symposium, Water and Environment, Hobart, Tasmania.
[8] Vallentine E.M., Benson, I.A., Nalluri, C. and Bathurst, J.C., 2001. Regime theory and the stability of straight channels with bankfull and overbank flow. Journal of Hydraulic Research, IAHR, 39, No. 3.
[9] A. R. Keshavarzi and S. H. Nabavi, “Dominant discharge in the kor river, fars province, Iran,” in Proceedings of the 10th International Water Technology Conference (IWTC ’10), pp. 299–306, Assiut University, Alexandria, Egypt, 2006.
[10] Afshin, Yadu'llah (1994). Rivers of Iran, Volume I, DOE, Jamab Consulting Engineers Co., Pp. 3340.
[11] Pirestani, M. R., Rezaei Benisi N., Majdzadeh Tabatabai, M. R. (1999) "Determination of Stable Width and Depth Regime in Sefidrood River Alluvial Intervals." Proceedings of the Second Conference of Iranian Hydraulic, Tehran, Pp. 182189.
