چکیده مقاله
In this paper, a new stochastic method for predicting scour hole depth in the future is presented in the braided river The model procedure is as follows:1 It is to apply regression equation with bed height as a dependent parameter and three independent parameters of maximum daily flow, and its corresponding sediment discharge and bed slope, these equations were derived at certain points along the river cross sections over a specific time 2 By applying observed data, sediment rating curve equation as well as a relationship between slope, water and sediment discharge were derived 3 Simulation of maximum monthly flow by ARIMA stochastic modeling 4 By substituting values obtained from step 3 into 2 and 1, respectively, river bed height was predicted along the cross sections The values of the deepest bed height is selected maximum scour hole depth Yahagi river in Japan was selected as a case study due to comprehensive and accessible data base A comparison of observed data and predicted values indicate a seasonable agreement between them
کلیدواژهها
نویسندگان
s Pourbakhshian
Ph D Student , Islamic Azad University, Science and Research Branch, Tehran, Iran
M.R.M Tabatabai
Assistant Prof , Waters Engineering Department Power and Water University, Tehran, Iran
m ouraminian
faculty member, Department of Civil Engineering, Ramsar Branch Islamic Azad University Ramsar Iran
شیوه ارجاع
Pourbakhshian, s and Tabatabai, M.R.M and ouraminian, m,1391,Prediction of local scouring in braided rivers by stochastic modeling,9th International Congress on Civil Engineering,Isfahan
ارائهشده در
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