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The Removal of Reservoir Sediment
Sedimentation of a reservoir created by a dam constructed on a natural watercourse is inevitable. A dam on a river changes the hydraulic characteristics of flow and the sediment—indicating a change in the transport capacity
This article explains reservoir silting and assesses the economy of hydraulic resources and design of precise measures to maintain or improve this situation. Estimation of sediment yield is an extremely complicated problem. Reasonable results were obtained in Iran by applying the chasse flushing) method for Sefid Rud Dam. A 1,800 million m 3 reservoir had originally been created at the end of construction of the high dam in 1961. But sediments silted about 800 million m 3 of the reservoir capacity by 1981. During eight years of flushing operations, about 300 million m3 of sediments were removed from the reservoir through five bottom outlets at riverbed level. These outlets can be used for irrigation water intake when none of the five turbines with 165 m3 per second total installed capacity is operating. The outlets are almost evenly distributed along the base of the dam. The total discharge of these outlets at the reservoir normal water level (RNWL) is about 980 m3/s.
Erosion plays a significant role in the amount of solids in runoff from the reservoir Measurement of erosion can be done in two ways: (I) metering of solid discharge, and (2) measurement of sedimentation in the reservoir
Both procedures have been put into practice in the Sejid Rud Dam project.
The Removal of Reservoir Sediment
Sedimentation of a reservoir created by a dam constructed on a natural watercourse is inevitable. A dam on a river changes the hydraulic characteristics of flow and the sediment—indicating a change in the transport capacity
This article explains reservoir silting and assesses the economy of hydraulic resources and design of precise measures to maintain or improve this situation. Estimation of sediment yield is an extremely complicated problem. Reasonable results were obtained in Iran by applying the chasse flushing) method for Sefid Rud Dam. A 1,800 million m 3 reservoir had originally been created at the end of construction of the high dam in 1961. But sediments silted about 800 million m 3 of the reservoir capacity by 1981. During eight years of flushing operations, about 300 million m3 of sediments were removed from the reservoir through five bottom outlets at riverbed level. These outlets can be used for irrigation water intake when none of the five turbines with 165 m3 per second total installed capacity is operating. The outlets are almost evenly distributed along the base of the dam. The total discharge of these outlets at the reservoir normal water level (RNWL) is about 980 m3/s.
Erosion plays a significant role in the amount of solids in runoff from the reservoir Measurement of erosion can be done in two ways: (I) metering of solid discharge, and (2) measurement of sedimentation in the reservoir
Both procedures have been put into practice in the Sejid Rud Dam project.
The Removal of Reservoir Sediment
Hassanzadeh, Youssef (author)
Water International ; 20 ; 151-154
1995-01-01
4 pages
Article (Journal)
Electronic Resource
Unknown
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