Riparian zone sewage reduction method

A riparian belt and river bank technology, applied in the field of non-point source pollution control, to achieve the effect of improving sewage interception capacity and water and soil retention capacity, wide sources, and good nitrogen and phosphorus pollution interception effect

Inactive Publication Date: 2016-06-15
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: through the setting of the infiltration strengthening zone and the configuration of the plants in the riparian zone, the sewage interception performance of the riparian buffer zone to the surface runoff is improved to reduce the pollutants entering the surface water body; at the same time, the infiltration strengthening zone The setting can increase the infiltration water volume of surface runoff and promote the replenishment of groundwater volume

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] Using the riparian soil of the Chaobai River in Beijing, a small test was conducted to simulate the treatment of runoff pollution in the enhanced infiltration zone, and at the same time compare the differences in the removal of pollutants by surface seepage. The simulation experiment device of percolation strengthening zone is made of plexiglass. Its main part is 310mm high, 1500mm long, and 150mm wide. A thick sawdust-soil mixture layer with a dry weight ratio of 1:7, and a layer of geotextile is laid between the gravel layer and the sawdust-soil mixture layer to prevent the particulate matter in the seepage flow from entering the bottom outlet; in the sawdust-soil mixture layer The upper part is the percolation layer, which is composed of 7cm thick coarse river sand with a dry weight ratio of 1:1 mixed with filler, and the filler is zeolite. At the same time, considering the growth of herbaceous plants, a 15cm thick soil layer is set on the upper part of the mixture l...

Embodiment 2

[0033] Using the simulated small test device in Example 1, all of them were filled with riparian zone soil, and ryegrass, annual sansevieria, and paradise grass were planted respectively, and the simulated riparian zone pollution interception experiment was carried out. Four small test devices are connected in series to simulate a riparian zone with a width of 6 meters. The initial pollutant concentration in simulated runoff is: total nitrogen 7mg / L, ammonia nitrogen 3mg / L, nitrate nitrogen 4mg / L, and total phosphorus 0.8mg / L. The results showed that ryegrass had a better removal effect on total nitrogen, ammonia nitrogen, nitrate nitrogen and total phosphorus. The removal rates of ryegrass to the four pollutants were 30.1%, 21.9%, 33.6% and 40.5%, respectively, and the treatment effect was higher than that of Sansevieria (26.7%, 18.0%, 23.5% and 31.2%) and Paradise grass (24.6%, 19.2%, 22.1% and 29.4%). This shows that perennial herbaceous plants planted in the riparian zon...

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Abstract

The invention discloses a riparian zone sewage reduction method, particularly a riparian zone sewage reduction method by combining a perennial vegetation zone and an infiltration reinforcement zone. The method comprises the following step: arranging an infiltration reinforcement zone and a perennial herb sewage interception buffer zone for the riparian zone, wherein the sewage interception buffer zone is composed of a hygrophytic herb zone, a mesozoic herb zone and a xeromorphic herb zone which are sequentially arranged from the riverbank to the place far away from the riverbank, a reaping mode is adopted to reduce the growth of the annual herbs, and the infiltration reinforcement zone is arranged between the hygrophytic herb zone and the mesozoic herb zone. The method can effectively intercept sewage and increase the infiltration amount of underground water; and the perennial herbs have developed root systems, so the reasonable arrangement of the perennial herbs is beneficial to enhancing the sewage interception capacity and water/soil retention capacity of the riparian zone. By sectionallly planting and arranging the hygrophytic, hygrophytic and xeromorphic perennial herbs, the vegetation can be regulated to enhance the sewage interception capacity of the riparian buffer zone.

Description

technical field [0001] The invention belongs to the field of non-point source pollution control, and in particular relates to a method for improving surface runoff pollution interception capacity by using riparian plants and infiltration strengthening belts. Background technique [0002] The vegetation in the riparian zone is very important for the ability of the riparian zone to intercept the surface runoff. Herbaceous plants grow densely and tall, and the individual plants are relatively small and can cover the surface, so they can remove the surface runoff in slow runoff. It has a very good effect on runoff pollutants, degradation and adsorption of pollutants. The roots and soil of riparian vegetation can combine with each other to form a strong biological cohesion, which is conducive to strengthening the spatial structure of the soil, while perennial herbaceous plants have more developed root systems than annual herbaceous plants, which can improve the sewage interceptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/281C02F3/32C02F3/34C02F9/00C02F2103/001C02F2301/08
Inventor 华玉妹张云陈航赵建伟刘广龙朱端卫
Owner HUAZHONG AGRI UNIV
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