Title: Relationship between Channel Scouring/silting Amount and Water-sediment Transport Process in Inner Mongolia Reach of Yellow River
Abstract: According to the analysis of the observed data from 1952 to 2003,the Inner Mongolia Reach of the Yellow River has sedimentation in natural state.After building and operation of the Qingtongxia and Sanshenggong reservoirs,the muddy water was stored and clear water was discharged,and the different combinations of water and sediment made the channel have scour and sedimentation.When the Qingtongxia Reservoir lost its function of storing muddy water and discharging clear water,however,is the river returned to the sedimentation state.The channel scour,inflow and incoming sediment have a close linear combination correlated,which indicate that there is a direct causal relationship between the channel scour and the combination of flow and sediment,so that a mathematical model was set up for calculating the channel scour.The incoming sediment coefficient is key indicator of determining channel scour changes.The observed data analysis show that the scour occur in the channel when incoming sediment coefficient is less than or equal to 0.005,the scour and sedimentation occur in the channel when the incoming sediment coefficient is between 0.005 and 0.009,the sedimentation occur when the incoming sediment coefficient is greater than 0.009,and the sedimentation is stable when incoming sediment coefficient is greater than 0.015 with,1.0 as asymptote.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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Cited By Count: 2
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