Ecological ditch system capable of preventing rainfall runoff erosion and reinforcing pollutant purification

Abstract

The invention discloses an ecological ditch system capable of preventing rainfall runoff erosion and reinforcing pollutant purification. The system comprises a collecting tank for collecting solid pollutant particles, a bottom slope, a side slope, an aeration device and a biological filler baffle, wherein the collecting tank is in a staircase structure and used for preventing pollutants in the collecting tank from longitudinally flowing along with the water flow; the collecting tank is composed of a bottom and a side wall; both sides of the collecting tank are sequentially connected with the bottom slope and side slope from bottom to top; the gradient of the bottom slope is 0.1-0.5, and submerged plants are grown on the bottom slope; the gradient of the side slope is 0.7-0.9, and emerging plants are grown on the side slope; the aeration device is composed of aeration pipes and an aerodynamic system which are connected with each other; the aeration pipes are arranged at the center of the bottom of the collecting tank at equal intervals; the aerodynamic system is arranged on the bottom of the collecting tank; both sides of each aeration pipe are provided with joint pins for fixing the biological filler baffle; and the biological filler baffle performs the functions of biological purification and water flow prevention.

Description

technical field [0001] The invention belongs to the technical field of agricultural non-point source pollution control engineering, and specifically relates to an ecological ditch that integrates strengthening plants, biological purification and anti-rainfall runoff erosion, reduces the loss of solid pollutant particles, and reduces the release of nitrogen and phosphorus from sediment sediments. system. Background technique [0002] Non-point source pollution is one of the ubiquitous environmental problems in the world. Compared with point source pollution, it is difficult to monitor and control, and has the characteristics of large-scale harm. In the 20th century, non-point source pollution has increasingly become an important factor in water pollution, and research on agricultural non-point source pollution has gradually become active and has become a hot topic. Many foreign scholars have carried out a lot of research work on water eutrophication. According to the 2003 s...

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Problems solved by technology

my country is the world's largest user of chemical fertilizers and pesticides. The annual average amount of chemical fertilizer per unit of cultivated land is four times that of the United States. The average level of chemical fertilizer application far exceeds the safety limit set by developed countries. The fertilizer is seriously lost after rainfall and irrigation and drainage, and contains a lot of nitrogen. The runoff of phosphorus nutrients and high-toxicity and high-residual pesticides is directly discharged into ditches, rivers or lakes, causing the overgrowth of certain algae and causing a large number of deaths of other aquatic animals and plants. risks to the environment and

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