阅读说明：本技术 一种农业面源及地表径流初期雨水调蓄截污生态带 (Agricultural non-point source and surface runoff initial rainwater regulation and storage sewage interception ecological zone ) 是由 赵祥华 魏翔 张春敏 张骞 于 2020-04-30 设计创作，主要内容包括：本发明公开了一种农业面源及地表径流初期雨水调蓄截污生态带,包括截污干渠和设置于截污干渠两侧的堤岸,截污干渠设置在湖泊沿岸；截污干渠由渠底、护脚和护岸围合而成,护脚垂直设置在渠底下表面的两侧,护岸由常水位以下护岸和常水位以上护岸组成；护脚和常水位以下护岸均由格宾石笼结构构筑而成；常水位以上护岸由底层的种植土层和上层的土工格栅三维网植草层组成；土工格栅三维网植草层及截污干渠两侧水浅区域种植有挺水植物和沉水植物,截污干渠中部水深区域种植有漂浮植物,堤岸上设置有乔灌结合绿化带。本发明通过截污生态带可截断进入湖泊的农田废水和初期雨水；并对截留雨、污水进行生态化处理,可保护湖泊生态环境。(The invention discloses an agricultural non-point source and surface runoff initial rainwater storage and interception ecological zone, which comprises a sewage interception main channel and embankments arranged on two sides of the sewage interception main channel, wherein the sewage interception main channel is arranged on a lake shore; the sewage interception main channel is formed by enclosing a channel bottom, guard legs and a revetment, the guard legs are vertically arranged on two sides of the lower surface of the channel bottom, and the revetment consists of a revetment below the normal water level and a revetment above the normal water level; the foot guards and the bank guards below the normal water level are both constructed by gabion structures; the bank protection above the normal water level consists of a planting soil layer at the bottom layer and a geogrid three-dimensional net grass planting layer at the upper layer; emergent aquatic plants and submerged plants are planted in shallow water areas on two sides of the geogrid three-dimensional net grass planting layer and the sewage intercepting main channel, floating plants are planted in a water depth area in the middle of the sewage intercepting main channel, and a tree and irrigation combined green belt is arranged on the embankment. The invention can cut off the farmland wastewater and the initial rainwater entering the lake through the sewage-cutting ecological zone; and the trapped rain and sewage are subjected to ecological treatment, so that the ecological environment of the lake can be protected.)

1. An agricultural non-point source and surface runoff initial rainwater storage and sewage interception ecological zone comprises a sewage interception main channel and embankments (1) arranged on two sides of the sewage interception main channel, and is characterized in that the sewage interception main channel is arranged on a lake shore; the sewage interception main channel is formed by enclosing a channel bottom (2), a guard leg (3) and a revetment; the guard legs (3) are vertically arranged on two sides of the lower surface of the channel bottom (2), the guard banks extend upwards from two sides of the upper surface of the channel bottom (2) and are higher than the normal water level (10) of the sewage intercepting main channel, and each guard bank is composed of a guard bank (4) below the normal water level and a guard bank (5) above the normal water level; the guard feet (3) and the revetment (4) below the normal water level are both constructed by gabion structures; the revetment (5) above the normal water level consists of a planting soil layer (6) at the bottom layer and a geogrid three-dimensional net grass planting layer (7) at the upper layer; emergent aquatic plants and submerged plants are planted in the geogrid three-dimensional net grass planting layer (7) and shallow water areas on two sides of the sewage interception main channel, floating plants (8) are planted in the middle water depth area of the sewage interception main channel, and a tree and irrigation combined green belt (9) is arranged on the embankment (1).

2. The ecological zone for regulating and storing initial rainwater of agricultural non-point sources and surface runoff according to claim 1, wherein a sewage treatment station is arranged near the sewage interception main channel, and the sewage interception main channel is connected to the sewage treatment station through a pump.

3. The ecological zone for regulating and storing agricultural non-point source and surface runoff initial rainwater and intercepting sewage as claimed in claim 1, wherein the intercepting main channel is connected with the drainage ports of the existing farmland drainage channel and river channel through an intercepting facility, and a sand settling system is arranged at the connection position.

4. The ecological zone for regulating and storing the initial rainwater of the agricultural non-point source and the surface runoff according to claim 1, wherein an overflow facility is arranged on the sewage intercepting main channel, and the rainwater overflowing from the sewage intercepting main channel is dispersed and flows into the green zone of the lakeside through the overflow facility.

5. The ecological zone for regulating and storing rainwater and intercepting sewage in agricultural non-point source and surface runoff initial stage of claim 1, wherein the emergent aquatic plant is one or any combination of lotus, loosestrife, calamus, reed and cattail.

6. The ecological zone for regulating storage and intercepting soil surface runoff initial rainwater according to claim 1, wherein the submerged plants are one or any combination of calamus, tape grass, hornwort, watermifoil and hydrilla verticillata.

7. The ecological zone for regulating and storing initial rainwater of agricultural non-point source and surface runoff and intercepting sewage as claimed in claim 1, wherein the floating plants (8) are one or any combination of water peanuts, duckweed, water lily or copper cash grass.

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to an agricultural non-point source and surface runoff initial rainwater storage and sewage interception ecological zone.

Background

In recent years, with the control of point source pollution such as urban domestic sewage, industrial wastewater and the like, the severity of water environment pollution caused by rural non-point source and surface runoff initial rainwater pollution is gradually highlighted. Research shows that agricultural non-point source pollution damages lake water environment increasingly, and due to the fact that a large amount of pollutants are carried into lakes by river discharge and surface runoff, water quality of lakes deteriorates, eutrophication and even ecological systems are damaged.

Agricultural non-point source pollution mainly comes from farmland solid waste, farmland fertilizer loss and livestock manure pollution, and pollutants enter a receiving water body under the scouring action of rainwater and runoff, so that the water body (including surface water and even underground water) is polluted. The main part of rain water pollution is initial rainfall runoff, and the pollution load carried in the initial rainfall runoff accounts for about 60-75% of the whole rainfall process. Therefore, it is very urgent to adopt proper measures to control rural area non-point sources and surface runoff initial rainwater.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an agricultural non-point source and surface runoff initial rainwater storage and sewage interception ecological zone.

The invention is implemented by the following technical scheme:

an agricultural non-point source and surface runoff initial rainwater storage and interception ecological zone comprises a sewage interception main channel and embankments 1 arranged on two sides of the sewage interception main channel, wherein the sewage interception main channel is arranged on a lake shore and can intercept farmland wastewater, domestic drainage and initial rainwater entering the lake; and carry on the ecological treatment to the retention rain, sewage; discharging clear water into the lake; the sewage interception main channel is formed by enclosing a channel bottom 2, guard legs 3 and a guard bank, wherein the guard legs 3 are vertically arranged on two sides of the lower surface of the channel bottom 2, and the guard bank extends upwards from two sides of the upper surface of the channel bottom 2 and is higher than the normal water level 10 of the sewage interception main channel; the revetment consists of a revetment 4 below the normal water level and a revetment 5 above the normal water level; the guard feet 3 and the revetment 4 below the normal water level are both constructed by gabion structures; the revetment 5 above the normal water level consists of a planting soil layer 6 at the bottom layer and a geogrid three-dimensional net grass planting layer 7 at the upper layer; emergent aquatic plants and submerged plants are planted in the geogrid three-dimensional net grass planting layer 7 and the shallow water areas on the two sides of the sewage intercepting main channel, floating plants 8 are planted in the middle deep water area of the sewage intercepting main channel, and a tree and irrigation combined green belt 9 is arranged on the embankment 1.

And a matched sewage treatment station is arranged near the sewage interception main channel, and the sewage interception main channel is connected to the sewage treatment station by a pump.

Cut dirty trunk through setting up the outlet that holds back facility and existing farmland drainage canal and river course and link up, link up the department and be provided with sand setting system, can hold back the silt that contains in farmland drainage canal and the river course, avoid forming the silt siltation and influence the effective water cross section of cutting dirty trunk with the junction of cutting dirty trunk.

The sewage interception main channel is provided with an overflow facility, rainwater overflowing from the sewage interception main channel dispersedly flows into the lakeside green belt through the overflow facility, so that the water quality purification function of the lakeside green belt can be fully exerted, and the water is discharged into lakes after pollutants in the water are further removed through the lakeside green belt.

The emergent aquatic plant is one or any combination of lotus, loosestrife, calamus, reed and cattail.

The submerged plant is one or any combination of calamus, tape grass, hornwort, watermifoil and hydrilla verticillata.

The floating plant 8 is one or any combination of water peanuts, duckweed, water lily or copper cash.

Compared with the prior art, the invention has the following beneficial effects: 1. the sewage intercepting main channel is arranged on the lake shore, so that farmland wastewater and initial rainwater on the lake shore can be thoroughly intercepted, and the effects of regulation and waterlogging prevention are achieved; 2. the guard feet and the revetment under the normal water level adopt gabion structures, so that the bank slope can be prevented from slipping, and the stability of the bank slope is ensured; 3. the bank protection above the normal water level adopts geogrid three-dimensional net vegetation slope protection, can grow plants, has large void ratio, strong water permeability, large biomass which can be attached and inhabited, and good removal effect on pollution; can also prevent surface soil from slipping, flood scouring and erosion of surface runoff; 4. by arranging the arbor and shrub combined green belt on the embankment, rainwater can be intercepted, surface runoff is filtered, and non-point source pollution entering the sewage intercepting main channel is intercepted; 5. emergent aquatic plants, submerged plants and floating plants are planted in the sewage intercepting main channel, nitrogen and phosphorus in the sewage are absorbed by the plants and can be converted into nutrient components required by growth, and waste is changed into valuable, so that 'sewage' and 'water' separation is realized, and the eutrophication level of a water body is reduced; 6. the mode of entering the lake at a single point is changed into the mode of dispersing into the lake through an overflow facility, and the water quality purification function of the lakeside zone can be fully exerted.

Drawings

FIG. 1 is a schematic structural view of a sewage intercepting ecological zone of the present invention;

FIG. 2 is a schematic structural view of the sewage intercepting ecological zone of comparative example 1;

FIG. 3 is a schematic structural view of the sewage intercepting ecological zone of comparative example 2;

FIG. 4 is a schematic structural view of a sewage intercepting ecological zone of comparative example 3;

in the figure: 1. the method comprises the following steps of embankment, 2, canal bottom, 3, banket, 4, embankment below normal water level, 5, embankment above normal water level, 6, planting soil layer, 7, geogrid three-dimensional net grass planting layer, 8, floating plant, 9, arbor and irrigation combined green belt and 10, normal water level.

Detailed Description

The invention is further illustrated by the following figures, examples and comparative examples, without limiting the scope of the invention to the examples.