Pre-reservoir series system of purification for non-point source pollution in hilly and mountainous area agriculture

Abstract

The invention discloses a pre-reservoir series system of purification for non-point source pollution in small watershed agriculture of hilly and mountainous areas. The system comprises a series of small-size pre-reservoir units in series, wherein each pre-reservoir unit mainly comprises four parts: (1) an ecological reservoir and a spillway sluice: by building a water retaining dam to construct the ecological reservoir used fro storing water for dry seasons, retaining for rain seasons and settling sediments and suspended solids in runoff; (2) a setting pond for removing particulate matters and sediments to protect the aquatic vegetation of the pre-reservoir area to a certain degree; (3) flood discharge ditches (ecological ditches and flood discharge pipes) for preventing flood from damaging the pre-reservoir from the front and from the side when heavy rain falls; and (4) a pre-reservoir area: the aquatic vegetation with strong adaptive capacity under stress conditions, good purification effect, and developed root system for recovering the water level. The invention provides a technical reference for non-point source pollution control in small watershed agriculture of extremely difficult hilly and mountainous area, and has the advantages of simple construction, strong pertinence, harmony between the flood discharge and purification, etc.

Description

1. Technical field [0001] The invention relates to the technical field of agricultural non-point source pollution control and water pollution ecological restoration, in particular to the construction technology of front-end storage for non-point source pollution enhancement and purification in small rural watersheds, and is mainly applicable to agricultural non-point source pollution control in mountainous and hilly areas and sloping agricultural areas. 2. Background technology [0002] Globally, after remarkable achievements in point source pollution control, the water environment has not been fundamentally improved. The reason is that a large part of water bodies are polluted by non-point sources. Among the many types of non-point source pollution, agricultural non-point source pollution is one of the most important factors leading to water pollution. characteristics, its management and control are more difficult. The pre-storage technology for agricultural non-point sour...

AI Technical Summary

Problems solved by technology

[0005] A series of environmental problems such as the difficulty in controlling agricultural non-point source pollution in small watersheds in mountainous and hilly areas, especially in the case of heavy rainfall, serious soil erosion, high concentration of agricultural non-point source pollutants, and prominent contradictions between flood discharge and water purification, have been developed. Through the construction of small watersheds Agricultural non-point source pollution purification pre-storage series system to remove N, P nutrients and suspended solids in the surface runoff of villages and towns in the watershed and other agricultural non-point source pollution

Images