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Method for mitigating silt blockage of confluence of main stream and tributary of mountain river
The invention belongs to the technical field of water and sediment movement disaster reduction for mountain rivers, and provides a method for mitigating the silt blockage of the confluence of a main stream and a tributary of a mountain river. The steps are as follows: (1) the position of the concentrated flow route of the tributary meeting the main stream is surveyed when the tributary is in the normal water level period, and the position of the concentrated flow route of the tributary meeting the main stream and the maximum siltation thickness of the silt of the confluence of the main stream and the tributary after flood subsidence are surveyed when the tributary is in the flood period; (2) according to the surveys of step 1, at least two rows of water-blocking piers are arranged in the tributary, at least three water-blocking piers are arranged, and the position of each water-blocking pier needs to meet the following conditions: each water-blocking pier is located outside the position of the concentrated flow route of the tributary when the tributary is in the normal water level period, and each water-blocking pier is located within the position of the concentrated flow route of the tributary when the tributary is in the flood period. The method described by the invention can mitigate the adverse influence of the forced silt discharge phenomenon of the tributary on the flood carrying safety of the riverway and the configuration of the riverway, thus increasing the flood carrying safety of the riverway of the mountain river.
Method for mitigating silt blockage of confluence of main stream and tributary of mountain river
The invention belongs to the technical field of water and sediment movement disaster reduction for mountain rivers, and provides a method for mitigating the silt blockage of the confluence of a main stream and a tributary of a mountain river. The steps are as follows: (1) the position of the concentrated flow route of the tributary meeting the main stream is surveyed when the tributary is in the normal water level period, and the position of the concentrated flow route of the tributary meeting the main stream and the maximum siltation thickness of the silt of the confluence of the main stream and the tributary after flood subsidence are surveyed when the tributary is in the flood period; (2) according to the surveys of step 1, at least two rows of water-blocking piers are arranged in the tributary, at least three water-blocking piers are arranged, and the position of each water-blocking pier needs to meet the following conditions: each water-blocking pier is located outside the position of the concentrated flow route of the tributary when the tributary is in the normal water level period, and each water-blocking pier is located within the position of the concentrated flow route of the tributary when the tributary is in the flood period. The method described by the invention can mitigate the adverse influence of the forced silt discharge phenomenon of the tributary on the flood carrying safety of the riverway and the configuration of the riverway, thus increasing the flood carrying safety of the riverway of the mountain river.
Method for mitigating silt blockage of confluence of main stream and tributary of mountain river
WANG XIEKANG (author) / LIU XINGNIAN (author) / YE LONG (author) / WANG YULIN (author)
2015-09-16
Patent
Electronic Resource
English
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
Effects of tributary floodplain on confluence hydrodynamics
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