Protective structure for preventing and controlling riverway concave bank from being eroded

Abstract

The invention discloses a protective structure for preventing and controlling a riverway concave bank from being eroded. The protective structure comprises an overflow weir formed through double-layerinlaying, a protective arm and dam abutments formed by inlaying large dimension stones. The relatively higher protective arm is arranged on the concave bank side prone to erosion of a riverway, and the relatively low overflow weir is arranged at the center of the riverway, so that river water is centralized in the overflow weir and a protection-free convex bank to flow through a river bend, flowing of the river water close to the concave bank is retarded, the shear stress at the concave bank is reduced, silt at the concave bank is prevented from being eroded by the river water, meanwhile water level rise before the overflow weir is quick, a scour pit is formed behind the weir, pressure gradient is formed on a river bed due to water level difference, and surface water and underground waterexchange is promoted. Compared with a traditional method, the protective structure is low in cost and long in service life, can also prevent the concave bank from being eroded, promotes surface waterand underground water exchange, thus improves the self-cleaning capacity of the riverway, relieves riverway pollution and has a wide application prospect in the fields such as channel improvement ofriverway and mountainous area drainage basins.

Description

technical field [0001] The invention relates to the field of river channel water and soil conservation and river ecological management, in particular to a protective structure for preventing and controlling the erosion of concave banks of the channel. technical background [0002] Bank erosion is an important way for rivers to evolve laterally, and it exists along almost all rivers. After the river bank is eroded, it will face the degradation of the ecological environment, and even the collapse of the river bank will cause major accidents. Therefore, the erosion of the river bank is also an important threat to the safety of the land, ecological environment and people's life and property along the river. In the process of land improvement and river channel improvement, maintaining water and soil and preventing river bank erosion have always been the top priority. Natural rivers are almost all curved. Due to the unique flow characteristics of river bends, the slopes of the co...

AI Technical Summary

Problems solved by technology

In the existing river regulation and pollution control process, no attention has been paid to the integrity of the river ecosystem, only considering the river flow and ignoring the importance of the exchange process of surface water and groundwater for maintaining the river habitat, and ignoring the importance of the hyporheic zone as surface water and groundwater. The important role played by the ecotone in the process of river self-purification

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