Seepage-intercepting and pollutant-removing system of large channel non-water passing slope

Abstract

The invention relates to a seepage-intercepting and pollutant-removing system of a large channel non-water passing slope, and the system mainly comprises four parts: a greensward slope protection belt, an ecological seepage-intercepting ditch, a drainage subsurface pipe and a water collecting well. The greensward slope protection belt is a concrete grid turf slope or the combination slope protection of grass and shrubs; the ecological seepage-intercepting ditch is arranged at a berm which is near to the slope toe part of an inner slope of the channel non-water passing cross section and shaped like an inverted trapezoid which is wide at the top and narrow at the bottom, the ditch is under cut and fill method by sands and stones with different particle sizes, plants are plated at the upper part, thereby being capable of effectively intercepting radial flow, depositing silty sands and granular pollutants during the rapid infiltration process of water flow in a short distance and ingesting, absorbing or converting soluble pollutants; and the water flow after the purification is collected in the water collecting well along the drainage undersurface pipe. The invention constructs the seepage-intercepting and pollutant-removing system which integrates flow interception, seepage interception, flow guide, flow collection and water quality purification and has the advantages of less project investment, simple structure, no additon of occupied area and the like, thereby being an ecological protection new technology of the large channel slopes which takes actions that suit local circumstances being economic and practical and having important promotional value.

Description

technical field [0001] The invention relates to the problem of seepage interception on the non-passing slope surface of a large-scale water delivery channel and the decontamination of surface runoff, and belongs to the technical field of agricultural water and soil engineering. Background technique [0002] During the construction of large-scale canals, there are many types of construction methods, excavation damage, and a large area of ​​piling pads, resulting in the destruction of the original vegetation cover and rock slopes, forming a large-scale linear distribution of secondary bare land; The water section is washed by precipitation, and soil erosion on the slope will bring sand-carrying water into the channel; pollutants along the line will directly enter the channel with the slope runoff, or infiltrate into the channel through groundwater, seriously affecting the water quality of the channel. At present, there are many treatment technologies for water and soil erosion...

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