Dry land ecological interception channel adopting slope protection technology and construction method thereof

Abstract

The invention discloses a dry land ecological interception channel adopting the slope protection technology and a construction method thereof. The cross section of the channel takes the shape of an inverted trapezoid; three-dimensional plant nets are arranged on channel walls and closely cling to compacted soil bodies; wet soil is laid on the plant nets; greensward with developed root systems is laid onto the wet soil; perennial aquatic plants are planted at the bottom of the channel in an S staggered manner. The construction method of the channel comprises the following steps: laying a layer of three-dimensional nets on the compacted soil bodies of the channel walls, and additionally laying a layer of wet soil to completely cover the plant nets; then laying the greensward with developed root systems immediately. According to the invention, the three-dimensional plant net slope protection technology is adopted, the plants on the channel walls on two sides and at the bottom of the channel are reasonably arranged, and the structural stability is enhanced due to the anchoring effect of the root systems and the plant nets, so that the stability of the channel is improved by 4-5 times as compared with that of a pure soil channel and the service life is greatly prolonged. The channel and the construction method thereof are low in construction cost, low in maintenance cost, good in pollutant interception effect, stable in structure, elegant in visual effect, and suitable for popularization and application in large areas.

Description

Technical field [0001] The invention belongs to the technical field of agricultural non-point source pollution control, and specifically relates to a dryland ecological interception ditch adopting slope protection technology and a construction method thereof. Background technique [0002] In recent years, with the rapid development of modernization and intensification of dryland planting such as forests and fruits, open-air vegetables, and the pursuit of high yield in one-sided, excessive and unreasonable use of chemical fertilizers has become increasingly prominent, soil compaction and salinization have increased, and heavy rains have caused runoff. The serious loss of nitrogen and phosphorus is an important reason for the eutrophication of regional water bodies. In particular, the loss of particulate adsorbed nitrogen and phosphorus account for a large proportion, accounting for about 40% and 60% of the total loss respectively. [0003] In view of the characteristics of dryland r...

AI Technical Summary

Problems solved by technology

However, the service function of ditches in dry farmland has its particularity, and the drainage efficiency requirements are relatively high. Generally, it is required that 1 to 3 days of rainfall and 1 to 3 days of rain should be discharged to the field surface without water accumulation. Therefore, the cross-sectional size of drainage ditches for dry land is generally larger

The existing all-concrete ditches in dry land have high engineering costs and poor pollutant interception effect. Although the traditional soil ditches have good purification effects, they are prone to problems such as ditch wall collapse and ditch bottom silt deposition due to the greater impact of horizontal and vertical hydraulic erosion. , which in turn affects the drainage and purification functions of the ditch itself

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