Maintenance design method for deeply-eroded exposed coast beach

Abstract

The invention discloses a maintenance design method for a deeply-eroded exposed coast beach, is applicable to the repair and treatment of a damaged coast, relates to the technical field of coastal zone ecological restoration, and solves the problems that the sandy coast property of a deeply-eroded coast cannot be recovered, and a conventional sand supplementing and maintenance manner cannot restore the deeply-eroded coast. The method has the advantages that a layered structure method using gravels as the filler, the filling structure is a three-layer mixed section structure formed by a beach face energy dissipation layer, a permeation cushion layer and a base layer, and the three filler layers cover sequentially from top to bottom; a profile form is a broken line, the upper portion is a horizontal dry beach part, the elevation H0 of the dry beach part is 100cm above a local design high water level, the width B0 of the dry beach part is 10-20m, the lower portion is an intertidal zone with uniform gradient, and the gradient is 1:5; the protecting function of the beach can be rebuilt, the permeability of the beach is improved, costal sediment transport speed is lowered, coast stability is increased, and a coastal landscape effect is improved.

Description

technical field [0001] The invention relates to a beach maintenance design method for a strongly eroded bare shore section. Background technique [0002] Nearly half of the sandy coasts in my country are eroded, so a large number of embankment projects have been built to resist, and the continuous coastline erosion can be prevented by fixing the coastline. However, this kind of hard engineering of "bank protection but not beach protection" has caused continuous erosion and damage to the intertidal beach, with partial or even complete exposure. In recent decades, beach maintenance has been widely promoted and applied as a sandy coast soft protection technology. This technology artificially replenishes sediments to a certain design elevation position, widens the beach or shoal to the sea, and improves and restores the beach. Function, beach maintenance conforms to the law of coastal topography and landform evolution, and compensates for the negative impact of human activities...

AI Technical Summary

Problems solved by technology

However, due to long-term damage to the coast by human activities, coastal erosion in many sections continues to intensify, resulting in irreversible damage

Due to changes in the dynamic environment and sand mining in offshore and intertidal zones, many erosion hotspots have been unable to restore their sandy coastal properties, and sandy beaches are no longer suitable for the development of current conditions. Conventional sand replenishment and maintenance methods cannot achieve this. Goals of shore-like restoration

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