Method of constructing lateral seepage-water spreading system in under-dam area of floodplain type river

Abstract

The invention discloses a method of constructing a lateral seepage-water spreading system in an under-dam area of a floodplain type river. The lateral seepage-water spreading system comprises a siphonwater taking system, river beach lateral seepage systems and river beach water spreading systems. The method comprises the following steps: construction of the siphon water taking system: siphoning an upstream water body of a retaining dam to flood land at two banks under the dam through a siphoning device; construction of the river beach lateral seepage systems: excavating lateral seepage ditches in the flood land, and enabling the lateral seepage ditches to be parallel to a water flow direction and to extend from river beach slopes to a water surface; and construction of the river beach water spreading systems: placing pebbles in the interval areas of lateral seepage ditches, and planting emergent aquatic plants and small trees and shrubs in the interval areas, wherein the river beach lateral seepage systems and the river beach water spreading systems are arranged at intervals and extend to the normal water level area of the riverway from the uppermost stage of the under-dam flood land. According to the method of constructing the lateral seepage-water spreading system in the under-dam area of the floodplain type river, investment is saved, technological operation is simple, andthe system has good applicability to multi-gate dam type riverways in northern areas, effectively purifies riverway water and intercepts non-point source pollution in shore zones and has certain application prospects.

Description

technical field [0001] The invention belongs to the field of water pollution control and ecological restoration, and in particular relates to a method for constructing a lateral seepage-overflow system in the sub-dam area of ​​a floodplain river. Background technique [0002] The river floodplain is a transitional zone between the terrestrial ecosystem and the aquatic ecosystem. It is a type of wetland ecosystem with special hydrological, soil and biological characteristics. The specific location of the river floodplain ensures its ecological harmony with the surrounding water body. Systems and terrestrial ecosystems are constantly exchanging energy, nutrients and species. River floodplains can filter and intercept water and riverbank pollutants. Floodplain plants can reduce water erosion of soil, and at the same time purify river water, create biological habitats, and enhance river habitat diversity. Because of its vast area, the floodplain has the function of storing and ...

AI Technical Summary

Problems solved by technology

The construction of river gates and dams can effectively alleviate the problem of water shortage, but it also brings a series of environmental problems. Artificial water conservancy facilities such as reservoirs and gates and dams have caused a large number of fragmented habitats in the river basin, and the continuity and integrity of the river network have been damaged. Serious, coupled with the serious pollution of the external source of the river water, resulting in a serious weakening of the self-purification ability of the water body, regional socio-economic development and water ecological environment are in an unbalanced state, etc.

[0004] The construction of the gate and dam has resulted in a large area of ​​bare beach due to the decrease in water volume in the downstream of the gate and dam area. This kind of beach has water flowing through it only in the wet season, and is exposed and dry during the normal and dry seasons. The river water body cannot flow most of the time. Through this area, the ecological function of this area is limited

Images