Ecological canal for preventing and controlling agricultural area source pollution

Abstract

The invention discloses an ecological canal for preventing and controlling agricultural area source pollution, which is realized by the following steps: A, constructing an artificial canal for collecting agricultural sewage and farmland surface runoff in a watershed, wherein the canal comprises a sewage runoff inlet and a main canal; B, making the width of the artificial canal between 60 and 240 cm, the depth between 40 and 70 cm, and the length unlimited; C, setting the shape of the canal according to the landform of the watershed; D, setting the sewage inlet of the canal according to the water volume of the sewage and the surface runoff rate in the watershed; and E, making the inlet a trapezoidal open inlet, arranging a physical barrier, a small bio-ball and a sedimentation basin at the inlet, wherein the physical barrier comprises a coarse screen and a fine screen; the two side walls of the main canal are embedded with large bio-balls; emergent plants, floating leaf plants and submerged plants are planted in the canal; and epiphytic algae and floating algae are inoculated in the sewage. The ecological canal for preventing and controlling the agricultural area source pollution is suitable for stopping, degrading, absorbing and utilizing water pollutants in watersheds of mountain region and hill farming areas.

Description

technical field [0001] The invention relates to the technical field of non-point source pollution control and biological treatment of water pollution, and more specifically relates to an ecological ditch for preventing and controlling agricultural non-point source pollution, which is suitable for traditional farming areas with serious agricultural pollution, especially mountainous and hilly areas and slope agricultural areas pollution disposal, such as the Three Gorges Reservoir Area and the agricultural farming area of ​​the Danjiangkou Reservoir Area. Background technique [0002] In my country, with the emphasis on point source pollution control and the improvement of governance capabilities, non-point source pollution has become an important factor affecting the water environment; agricultural non-point source pollution is becoming one of the main reasons for the deterioration of the rural ecological environment in my country, which is seriously restricted. Sustainable de...

AI Technical Summary

Problems solved by technology

Mats Astr6m compared the physical and chemical properties of the water in two streams (Western Finland). The upstream woodland of one stream had been dug and the other had not (paired watershed method). effect, but it leads to an increase in Mn, Ca, Mg, suspended matter and alkalinity in water, TOC and H 3 o + decrease in concentration

Although many scholars have conducted in-depth research on the role of ecological ditches in water pollution control, these studies are only on natural ditches, or pollution control is not a complete technical means, but only a pre-treatment link of pollution control. The purpose of strengthening the purification of pollutants directly inside the ditch cannot be achieved

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