Inland-river ecological regulation groin system

Abstract

The invention discloses an inland-river ecological regulation groin system. The inland-river ecological regulation groin system comprises a guide groin, a plurality of bank-protection short groins aswell as a plurality of water-retaining groins which are in one-to-one correspondence to the bank-protection short groins, which are sequentially arranged from upstream to downstream, wherein one end of the guide groin is connected with a river bank, the other end of the guide groin extends into a river channel to form certain angle with the river bank, and the groin head points to the downstream;each water-retaining groin is arranged offshore, is positioned on the middle of a channel, is in integrally of a U-shaped structure with a U-shaped opening pointing to the downstream, and is composedof an arc-shaped groin head and a two-section linear groin body, the groin body close to one side of main flow is arranged along the flow direction of the main flow, and the groin body at the shore side is parallel to the river bank; the bank-protection short groins are connected with the river bank on plane to form an T shape; the water-retaining groins and the corresponding bank-protection shortgroins are arranged in the forms of opposite-mouth groins, and water-passing branches are formed between the water-retaining groins and the bank-protection short groins. The inland-river ecological regulation groin system can meet navigation needs, improves channel floodwater capacity, and also can create a good habitat environment for animals and plants.

Description

Technical field [0001] The invention relates to a waterway regulation structure in the technical field of water conservancy and water transportation, in particular to a spur dike group for inland river ecological regulation. Background technique [0002] Our country has a vast territory and dense rivers. In river control and waterway transportation construction projects, spur dam structures are inevitably used. In river control projects, spur dams are one of the most widely used buildings; in flood control projects, they can be used to protect river banks from erosion; in waterway improvement projects, they can be used to narrow river channels and deepen waterways, that is, "shrink water". Attack the sand". [0003] In the past, the spur dike design was only carried out from the perspective of hydrodynamics and structural mechanics. Few design of the spur dike combined with ecological and aquatic biological needs. Under normal circumstances, sediment will silt up behind the dam ...

AI Technical Summary

Problems solved by technology

However, in the process of traditional spur dam structure design, in order to maximize engineering benefits, the spur dam is usually only designed for navigation needs. In order to achieve a better water constriction effect, durable but not eco-friendly materials are generally used, and the The groyne is designed as a continuous, impermeable physical groyne. On the one hand, it ignores the problem of leaving habitats and migration channels for aquatic organisms. It is difficult for plants and animals to grow and inhabit at the groyne, and it is difficult to form a unified organic ecological circle with the subsequent dam fields. , which is not conducive to the maintenance of the habitat around the spur dam. On the other hand, it reduces the flood capacity of the channel and increases the pressure of flood discharge.

Faced with the complex water flow structure at the spur dam, and under the long-term erosion of the water flow, the rocks on the surface of the dam body are easy to slip, causing local instability and it is difficult for plants to attach

In addition, in the previous design of spur dams, little consideration was given to creating a suitable habitat for animals and plants within the dam body, and to use the diverse flow patterns and scouring-silting topography behind the dam to form different biological function areas to exert their ecological functions.

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