Ecological spur dike enhancing exchange of river channel surface water and underground water

Abstract

The invention discloses an ecological spur dike enhancing exchange of river channel surface water and underground water. The structure applies the frontier achievements in the field of river hyporheiczones. The ecological spur dike includes a semi-permeable dam core and a rock block protecting surface. The ecological spur dike and a river bank are orthogonal, the cross section of a dam body is trapezoidal, an inner layer is the semi-permeable dam core formed by mixing gravels and local river channel substrate, and an outer layer is the rock block protecting surface formed by stacking rock blocks of different diameters. Compared with a conventional spur dike, the spur dike not only reserves functions of river bank protection and sand scouring by flow contraction of a conventional spur dike, but also effectively enhances undercurrent exchange action between the surface water and the underground water, so that an important effect of the hyporheic zones in the aspects of maintaining a river habitat and alleviating water body pollution is brought into full play, and the river channel ecological environment can be effectively repaired. The ecological spur dike is low in cost, requires less labor, is easy to construct, has a stable structure, is not damaged easily, and has a broad application prospect in the fields of river ecological restoration and the like.

Description

technical field [0001] The invention relates to the field of river channel ecological restoration, in particular to an ecological spur dam that enhances the exchange of surface water and groundwater in the river channel. Background technique [0002] In recent years, with the improvement of agricultural production level, nutrients such as nitrogen and phosphorus, pesticides, heavy metals and other organic pollutants, soil particles and other sediments in agricultural production activities have entered surface water bodies in various forms, causing serious The water pollution caused serious damage to the river ecosystem and even threatened the water safety of the people in the entire river basin. Therefore, how to restore the ecological environment of rivers, give full play to the self-purification function of rivers, and alleviate water pollution has become an important issue in the field of river regulation. [0003] A river is a complete continuum composed of the surface ...

AI Technical Summary

Problems solved by technology

In recent years, some scholars have considered the ecological restoration function of spur dikes, but most of them are limited to providing habitat for aquatic animals and plants, failing to consider the surface water and groundwater of the river channel as a complete continuum, and failing to make use of the subsurface flow zone to maintain the river habitat. , an important role in mitigating water pollution

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