Near-natural siltation-promoting and land-building flexible protection system

Abstract

The invention discloses a near-natural siltation promoting and land building flexible protection system. The near-natural siltation promoting and land building flexible protection system comprises a directional opening and closing type brush-shaped fence parallel to a coastline, a seabed surface covering net and a sand blocking and dredging integrated one-way sand barrier. The seabed surface covering net is arranged on the side, facing the sea, of the directional opening and closing type brush-shaped fence, the directional opening and closing type brush-shaped fence is distributed in an intertidal zone, the sand blocking and dredging integrated one-way sand barrier is distributed above the highest tide level line, and the seabed surface covering net is laid close to the seabed surface and is in a semi-floating state in seawater. The directional opening and closing type brush-shaped fence is simple in structure and convenient to use, the directional opening and closing type brush-shaped fence is matched with a sand blocking and dredging integrated one-way sand barrier and a seabed surface covering net to form a flexible protection system, one-way interception of sand grains in seawater and on land is achieved, the deposition process of the sand grains on one side of the land can be promoted, and the sand blocking and dredging integrated one-way sand barrier and the seabed surface covering net are effectively protected. Therefore, the purpose of near-nature and flexible siltation promotion and land building is achieved.

Description

technical field [0001] The invention belongs to the technical field of coastal ecological environment treatment, and in particular relates to a flexible protection system for promoting silting and land-building near nature. Background technique [0002] Among marine disasters, coastal erosion with a global trend has generally attracted attention. Coastal erosion refers to the destructive process of coastal retreat caused by the coastal sand supply being less than the coastal sand loss under the action of ocean dynamics. Twenty-five percent of the U.S. coast is severely eroded. 66% of Japan's coastlines have an annual rate of change of more than 1m. Nearly 70% of the sandy coast and part of the silt coast in my country are also eroded to varying degrees. This has caused beach erosion, land area reduction, submerged low-lying coastal areas, flooded seawater, and destroyed coastal buildings and facilities. Environmental hazards. Therefore, it is very necessary to develop met...

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Problems solved by technology

[0008] Although there are many forms of coastal protection projects, they all have their own shortcomings. Based on the above analysis, we can see that, first of all, except for the fourth artificial river beach sand replenishment measure, the rest of the measures are all set in seawater, and are not suitable for those above the high tide line. The beach does not play a protective role, and the sand particles will still be carried into the sea by wind erosion; secondly, various dams have played the role of reducing waves and depositing sediment on the shore, but at the same time, a large amount of sea sand is still washed back into the sea. Both sides of the dam play a role in blocking sediment, which reduces the supply of sediment and the effect of sedimentation; in addition, all kinds of dams are rigid structures, and generally only one is installed, and the waves passing through the dam also have a lot of energy. It will still erode the coast, and the dykes will be expensive and take a long time

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