Self-flowing riverway wetland system for ecological restoration of riverway

Abstract

The utility model belongs to the technical field of sewage treatment, and discloses a self-flowing riverway wetland system for ecological restoration of a riverway, which comprises a plurality of gabion walls, Reynolds protection pads and plant growing areas, the gabion walls are arranged along the self-flowing riverway at equal intervals, the plant growing areas are formed between the adjacent gabion walls, and the Reynolds protection pads are arranged on the gabion walls. The wetland is directly arranged in the river channel, additional land is not needed, the river channel sewage flow change can be effectively coped with, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, the ecological environment is protected, and the ecological environment is protected. The water flow in the whole course automatically flows, and electricity is not needed.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, and particularly relates to a gravity-flow river wetland system for river ecological restoration. Background Art

[0002] With the rapid development of China's economy, industrial wastewater, livestock and poultry aquaculture sewage, domestic sewage, farmland sewage and other sewage have entered the river, resulting in the destruction of the river ecological environment and seriously affecting the living environment of surrounding residents.

[0003] At present, river regulation mainly adopts the measure of source control and pollution interception. However, when source interception cannot be adopted or the interception is incomplete at the source, the ecological function of the river still cannot be restored. Therefore, in addition to source control and pollution interception, river wetlands are often used for river ecological restoration. Existing river wetlands mainly adopt bypass wetlands or directly plant aquatic plants in the river. The former introduces river sewage into the wetland for ecological treatment by setting gates, dams or pumping in the river, and then discharges it into the river after treatment. However, this method requires occupying the land adjacent to the river, cannot be directly arranged in the river, cannot effectively respond to the change of river sewage flow, and generally requires electricity. The latter adjusts the terrain in the river and directly plants aquatic plants in the river. However, this method cannot resist the erosion of river water flow during the flood season, and the river aquatic plants are easily washed away, thus damaging the river wetland. Content of the Utility Model

[0004] The purpose of the utility model is to provide a gravity-flow river wetland system for river ecological restoration, aiming to solve the above technical problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gravity-flow river wetland system for river ecological restoration includes several gabion walls, Reno mattresses and plant planting areas. The several gabion walls are arranged along the gravity-flow river at equal intervals, and the plant planting areas are formed between adjacent gabion walls. The plant planting areas are successively provided with emergent plants, fine gravel layers and coarse gravel layers from top to bottom. The Reno mattress is arranged upstream of the plant planting area at the uppermost reaches of the wetland, and the Reno mattress is arranged on the top surface of the clay layer.

[0007] In a preferred embodiment of the utility model, the frame structure of the gabion wall adopts a wire gabion mesh, the mesh size of the wire gabion mesh is 80mmX100mm, and the inside of the gabion mesh is filled with pebbles with a particle size of 10-30cm.

[0008] In a preferred embodiment of the utility model, one gabion wall is arranged every 50m, and the top elevation of the gabion wall is 0.5m higher than the adjacent riverbed.

[0009] In a preferred embodiment of the present utility model, the thicknesses of the Reno mattress and the clay layer at the bottom of the plant planting area are 40 cm and 20 cm respectively.

[0010] In a preferred embodiment of the present utility model, the emergent plants are selected from one or more of Iris pseudacorus, Iris tectorum, and Cyperus alternifolius, and the planting density is 20 plants per square meter.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The present utility model directly sets up a wetland in the river course without additional land use, can effectively cope with the change of the sewage flow in the river course, reduce the scouring intensity of the flood season water flow on the plants, purify the water quality of the river course, and is self-flowing throughout the process without electricity consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a vertical sectional structure schematic diagram of the present utility model;

[0014] Figure 2 It is an overall layout structure schematic diagram of the present utility model.

[0015] Reference numerals in the drawings; wherein, 1, gabion wall; 2, Reno mattress; 21, clay layer; 3, plant planting area; 31, emergent plants; 32, fine gravel layer; 33, coarse gravel layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the present utility model in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present utility model, but do not constitute a limitation to the present utility model.

[0017] Embodiment:

[0018] As Figure 1-2 shown, this embodiment provides a self-flowing river wetland system for river ecological restoration, including several gabion walls 1, Reno mattresses 2, and plant planting areas 3. The several gabion walls 1 are arranged equidistantly along the self-flowing river, and a plant planting area 3 is formed between adjacent gabion walls 1. The plant planting area 3 is successively provided with emergent plants 31, a fine gravel layer 32, and a coarse gravel layer 33 from top to bottom. The Reno mattress 2 is arranged upstream of the plant planting area 3 at the uppermost reaches of the wetland, and the Reno mattress 2 is arranged on the top surface of the clay layer 21.

[0019] In a preferred embodiment of the present utility model, further, the frame structure of the gabion wall 1 adopts a wire gabion mesh, the mesh size of the wire gabion mesh is 80mmX100mm, and the inside of the gabion mesh is filled with pebbles with a particle size of 10 - 30cm.

[0020] In a preferred embodiment of the present utility model, further, the gabion wall 1 is provided every 50m, and the elevation of the gabion wall top is 0.5m higher than the adjacent riverbed.

[0021] In a preferred embodiment of the present utility model, further, the thicknesses of the lowest clay layers 21 of the Reno mattress 2 and the plant planting area 3 are 40cm and 20cm respectively.

[0022] In a preferred embodiment of the present utility model, further, the emergent plants 31 are selected from one or more of Iris pseudacorus, Iris tectorum, and Cyperus alternifolius, and the planting density is 20 plants per square meter.

[0023] Specifically, the self-flowing river wetland system for river ecological restoration of the present utility model is composed of a gabion wall 1, a Reno mattress 2, and a plant planting area 3 from the upstream to the downstream of the river, and the plant planting area 3 is separated by the gabion wall 1.

[0024] The gabion wall 1 is filled with rubble or pebbles, which is used to slow down the water flow velocity, ensure the integrity of the wetland structure, prevent the wetland from being damaged by water flow scouring, and when the river water volume is small, it can directly penetrate into the wetland. At the same time, the gaps between the rubble or pebbles are beneficial to the formation of a biofilm with the function of purifying water quality.

[0025] The Reno mattress 2 is used to reduce the scouring intensity of the river sewage over the gabion wall 1 on the plants when the river water volume is large during the flood season. A clay layer 21 is provided at the bottom for anti-seepage to prevent pollutants in the water body from directly entering the groundwater.

[0026] The plant planting area 3 is provided with emergent plants 31, fine gravel layer 32, coarse gravel layer 33, and clay layer 21 with the function of purifying the river water quality from top to bottom, and a biofilm with the function of purifying water quality can be formed on the surface of the filler and the plant roots to enhance the water quality purification effect.

[0027] The plants selected for the emergent plants 31 are one or more of Iris pseudacorus, Iris tectorum, and Cyperus alternifolius, and the selected plants should have the characteristics of developed roots and not being prone to lodging.

[0028] This system is suitable for ecological restoration of rivers with a natural slope of less than 1%, relatively shallow water depth, and large water volume changes.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An artesian river wetland system for river ecological restoration, characterized in that, It includes several gabion walls (1), Reno mattresses (2) and plant planting areas (3). The several gabion walls (1) are arranged at equal intervals along the gravity flow river course. The plant planting areas (3) are formed between adjacent gabion walls (1). The plant planting areas (3) are successively provided with emergent plants (31), fine gravel layers (32) and coarse gravel layers (33) from top to bottom. The Reno mattress (2) is arranged upstream of the plant planting area (3) at the uppermost reaches of the wetland. The Reno mattress (2) is arranged on the top surface of the clay layer (21).

2. The self-flowing river wetland system for river ecological restoration according to claim 1, characterized in that, The frame structure of the gabion wall (1) adopts a wire gabion mesh. The mesh size of the wire gabion mesh is 80mmX100mm. The inside of the gabion mesh is filled with pebbles with a particle size of 10 - 30cm.

3. The self-flowing river wetland system for river ecological restoration according to claim 2, characterized in that, One gabion wall (1) is arranged every 50m.

4. The self-flowing river wetland system for river ecological restoration according to claim 3, characterized in that, The thicknesses of the Reno mattress (2) and the clay layer (21) at the bottom layer of the plant planting area (3) are 40cm and 20cm respectively.

5. The self-flowing river wetland system for river ecological restoration according to claim 1, characterized in that, The emergent plants (31) are selected from one or more of: Iris pseudacorus, Iris tectorum, Cyperus alternifolius, and the planting density is 20 plants per square meter.

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