A Coastal Ecological Buffer Belt Structure with Composite Functions

Abstract

The invention relates to a coastal ecological buffer zone structure having a compounding effect. The coastal ecological buffer zone structure comprises an herbaceous permeation zone, a shrub and herbaceous plant purifying zone, an arbor-herbaceous plant purifying zone and a reed purifying zone which are sequentially arranged in the runoff direction of farmland, wherein the herbaceous permeation zone comprises a bottom bearing layer, a gravel filling zone, a soil planting zone and a water reserving zone which are sequentially arranged from bottom to top, shrubs and herbaceous plants are plantedin the shrub and herbaceous plant purifying zone, arbors and herbaceous plants are planted in the arbor-herbaceous plant purifying zone, and hygrophytes and herbaceous plants are planted in the reedpurifying zone. Compared with common buffer zones, the coastal ecological buffer zone structure having the compounding effect can achieve remarkable permeation, detention storage and farmland rainwater runoff purification and has the advantages of rainfall flood regulation and storage, water purification, landscaping, biodiversity protection, water and soil conservation, low investment and operation cost and the like.

Description

technical field [0001] The invention relates to the field of ecological environment, in particular to a bank ecological buffer belt structure with composite functions, especially suitable for rivers with farmland on both sides in the north. Background technique [0002] Agricultural non-point sources are one of the main pollution sources of water bodies. More than 50% of the phosphorus and nitrogen pollution loads in rivers and lakes come from agricultural non-point source pollution loads. Therefore, controlling agricultural non-point source pollution is one of the key factors to prevent and control water eutrophication. Coastal buffer zone can effectively remove N, P, organic pollutants and heavy metals in water, and is an effective means to intercept agricultural non-point source pollutants, improve river water quality and ecological environment. Ecological service functions such as water and soil conservation. [0003] The treatment effect of the coastal buffer zone is ...

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Problems solved by technology

[0005] However, in actual operation, the farmland track flow is relatively fast, the residence time in the buffer zone is short, and the seepage is small, so the purification effect of the buffer zone cannot be fully utilized, and the existing buffer zone does not have a stagnation effect, which cannot reduce the peak of rainwater. , has little effect on stormwater control

Furthermore, the current research on the buffer zone only stays at the level of purifying pollutants, and there are few studies on the landscaping of the buffer zone and the construction of biological habitats

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