Ecological restoration method for black and odorous river channel

Abstract

The invention relates to the technical field of riverway treatment, and discloses an ecological restoration method for a black and odorous riverway, which comprises the steps of water purification, riverway desilting, riverway finishing, riverway slope protection, bottom mud restoration, ecological restoration, aeration and oxygenation, and flow regulation and control. According to the ecological restoration method for the black and odorous riverway, dredging can be conducted after water quality is purified, the riverway and slope protection are finished, water and soil loss is avoided, then bottom mud is restored, improved and solidified, finally, an aquatic animal ecological system is constructed, sustainable ecological treatment on the black and odorous riverway is achieved, the treatment difficulty of the black and odorous riverway is reduced, and the ecological restoration method is suitable for large-scale popularization and application. The black and odorous riverway treatment effect is improved, and the black and odorous riverway can be thoroughly and effectively treated for a long time through ecological restoration.

Description

Technical Field

[0001] The invention relates to the technical field of river channel regulation, and in particular to an ecological restoration method for black and smelly rivers. Background Art

[0002] Nowadays, with the rapid development of industrialization, a large amount of industrial wastewater and domestic sewage are generated. Many rivers are polluted by wastewater, and most of them have turned into black and smelly rivers. The black and smelly rivers pose a serious threat to the health of residents and ecological security. The treatment of black and smelly rivers is imminent.

[0003] At present, the treatment of black and smelly rivers requires regular dredging of riverbed mud and the introduction of a large amount of chemical agents. Regular dredging of riverbed mud is not only a large project, time-consuming and labor-intensive, but also difficult to ensure long-term and effective treatment of black and smelly rivers. At the same time, a large amount of chemical agents can easily cause secondary pollution, which is not conducive to protecting the ecological environment. The treatment of black and smelly rivers is poor, and it is difficult to achieve sustainable ecological treatment of black and smelly rivers.

[0004] In view of this, an in-depth study was conducted on the above-mentioned problems, and an ecological restoration method for black and smelly rivers was proposed to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide an ecological restoration method for black and smelly rivers to solve the problem that the existing black and smelly river management is difficult to achieve sustainable ecological management as mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0007] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0008] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0009] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0010] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0011] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0012] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0013] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0014] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0015] As a preferred technical solution of the present invention, the dosage of the flocculant in step 1 is 8 to 12 g / m 2 The oxidant is added 5 to 7 days after the flocculant is added, and the amount of oxidant added is 6 to 10 g / m 2 .

[0016] As a preferred technical solution of the present invention, the soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, plant soil and microbial culture liquid in a mass ratio of 20-30:12-18:30-40:1, and the amount of the soil conditioner added is 10-15 g / m 2 The curing agent is added 3 to 5 days after the soil conditioner is added, and the amount of curing agent added is 5 to 8 g / m 2 .

[0017] As a preferred technical solution of the present invention, in step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating leaf plants are planted at the corners of the river channel, and an ecological floating bed is set on the water surface in the river channel.

[0018] As a preferred technical solution of the present invention, the planting density of the submerged plants is 55 to 75 plants / m 2 The density of emergent plants is 35 to 45 plants / m 2 , the density of floating leaf plants is 40 to 50 plants / m 2 The ecological floating bed is set at equal intervals of 50 to 60 meters along the direction of river flow, and biological wax blocks are tied around the ecological floating bed.

[0019] As a preferred technical solution of the present invention, the aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0020] As a preferred technical solution of the present invention, the fish is omnivorous and filter-feeding.

[0021] As a preferred technical solution of the present invention, the benthic animals are snails and shellfish.

[0022] As a preferred technical solution of the present invention, the shrimps are green shrimps.

[0023] As a preferred technical solution of the present invention, the algae-eating zooplankton is a filter-feeding zooplankton mainly composed of rotifers and cladocerans.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the ecological restoration method of the black and smelly river channel can dredge the water after purifying the water quality, and repair the river channel and slope protection to avoid soil erosion, and then repair, improve and solidify the bottom mud, and finally build an aquatic animal ecosystem to achieve sustainable ecological management of the black and smelly river channel, reduce the difficulty of black and smelly river channel management, and improve the management effect of the black and smelly river channel. The ecological restoration can ensure the thorough, long-term and effective management of the black and smelly river channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a graph showing the water quality test results of the black and smelly river treatment for 2 months according to the present invention;

[0026] Figure 2 This is a graph showing the water quality test results of the black and smelly river treatment for 6 months according to the present invention;

[0027] Figure 3 This is a graph showing the water quality test results for the black and smelly river treatment for 12 months according to the present invention;

[0028] Figure 4 This is a graph showing the water quality test results for 24 months of black and smelly river management according to the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] The technical solution of the present invention is: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0032] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0033] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0034] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0035] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0036] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0037] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0038] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0039] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0040] The dosage of flocculant in step 1 is 8g / m 2 The oxidant was added 5 days after the flocculant was added, and the amount of oxidant added was 6g / m 2 .

[0041] The soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, grass soil and microbial culture liquid in a mass ratio of 20:12:30:1, and the amount of soil conditioner added is 10g / m 2 The curing agent is added 3 days after the soil conditioner is added, and the amount of curing agent added is 5g / m 2 .

[0042] In step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating-leaf plants are planted at the bends of the river channel, and an ecological floating bed is set up on the water surface in the river channel.

[0043] The planting density of submerged plants is 55 plants / m 2 , the density of emergent plants is 35 plants / m 2 , the density of floating leaf plants is 40 plants / m 2 The ecological floating beds are set up at equal intervals of 50m along the direction of river flow, and biological wax blocks are tied around the ecological floating beds.

[0044] The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0045] Among them, fish are omnivorous and filter feeders.

[0046] Among them, benthic animals are snails and shellfish.

[0047] Among them, the shrimp is green shrimp.

[0048] Among them, the algae-eating zooplankton are mainly filter-feeding zooplankton, such as rotifers and cladocerans.

[0049] Embodiment 2

[0050] The technical solution of the present invention is: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0051] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0052] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0053] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0054] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0055] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0056] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0057] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0058] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0059] The dosage of flocculant in step 1 is 8g / m 2 The oxidant was added 5 days after the flocculant was added, and the amount of oxidant added was 8g / m 2 .

[0060] The soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, grass soil and microbial culture liquid in a mass ratio of 20:15:35:1, and the amount of soil conditioner added is 12g / m 2 The curing agent is added 3 days after the soil conditioner is added, and the amount of curing agent added is 6g / m 2 .

[0061] In step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating-leaf plants are planted at the bends of the river channel, and an ecological floating bed is set up on the water surface in the river channel.

[0062] The planting density of submerged plants is 60 plants / m 2 , the density of emergent plants is 40 plants / m 2 , the density of floating leaf plants is 40 plants / m 2 The ecological floating beds are set up at equal intervals of 50m along the direction of river flow, and biological wax blocks are tied around the ecological floating beds.

[0063] The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0064] Among them, fish are omnivorous and filter feeders.

[0065] Among them, benthic animals are snails and shellfish.

[0066] Among them, the shrimp is green shrimp.

[0067] Among them, the algae-eating zooplankton are mainly filter-feeding zooplankton, such as rotifers and cladocerans.

[0068] Embodiment 3

[0069] The technical solution of the present invention is: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0070] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0071] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0072] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0073] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0074] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0075] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0076] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0077] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0078] The dosage of flocculant in step 1 is 10 g / m 2 The oxidant was added 6 days after the flocculant was added, and the amount of oxidant added was 8g / m 2 .

[0079] The soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, grass soil and microbial culture liquid in a mass ratio of 25:15:35:1, and the amount of soil conditioner added is 2g / m 2 The curing agent is added 4 days after the soil conditioner is added, and the amount of curing agent added is 6g / m 2 .

[0080] In step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating-leaf plants are planted at the bends of the river channel, and an ecological floating bed is set up on the water surface in the river channel.

[0081] The planting density of submerged plants is 65 plants / m 2 , the density of emergent plants is 40 plants / m 2 , the density of floating leaf plants is 45 plants / m 2 The ecological floating beds are set at equal intervals of 55m along the direction of river flow, and biological wax blocks are tied around the ecological floating beds.

[0082] The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0083] Among them, fish are omnivorous and filter feeders.

[0084] Among them, benthic animals are snails and shellfish.

[0085] Among them, the shrimp is green shrimp.

[0086] Among them, the algae-eating zooplankton are mainly filter-feeding zooplankton, such as rotifers and cladocerans.

[0087] Embodiment 4

[0088] The technical solution of the present invention is: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0089] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0090] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0091] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0092] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0093] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0094] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0095] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0096] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0097] The dosage of flocculant in step 1 is 10 g / m 2 The oxidant was added 6 days after the flocculant was added, and the amount of oxidant added was 8g / m 2 .

[0098] The soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, grass soil and microbial culture liquid in a mass ratio of 25:15:38:1, and the amount of soil conditioner added is 13g / m 2 The curing agent is added 6 days after the soil conditioner is added, and the amount of curing agent added is 7g / m 2 .

[0099] In step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating-leaf plants are planted at the bends of the river channel, and an ecological floating bed is set up on the water surface in the river channel.

[0100] The planting density of submerged plants is 65 plants / m 2 , the density of emergent plants is 40 plants / m 2 , the density of floating leaf plants is 45 plants / m 2 The ecological floating beds are set at equal intervals of 55m along the direction of river flow, and biological wax blocks are tied around the ecological floating beds.

[0101] The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0102] Among them, fish are omnivorous and filter feeders.

[0103] Among them, benthic animals are snails and shellfish.

[0104] Among them, the shrimp is green shrimp.

[0105] Among them, the algae-eating zooplankton are mainly filter-feeding zooplankton, such as rotifers and cladocerans.

[0106] Embodiment 5

[0107] The technical solution of the present invention is: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0108] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0109] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0110] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0111] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0112] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0113] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0114] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0115] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0116] The dosage of flocculant in step 1 is 12g / m 2 The oxidant was added 7 days after the flocculant was added, and the amount of oxidant added was 10g / m 2 .

[0117] The soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, grass soil and microbial liquid in a mass ratio of 30:18:38:1, and the amount of soil conditioner added is 15g / m 2 The curing agent is added 5 days after the soil conditioner is added, and the amount of curing agent added is 8g / m 2 .

[0118] In step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating-leaf plants are planted at the bends of the river channel, and an ecological floating bed is set up on the water surface in the river channel.

[0119] The planting density of submerged plants is 70 plants / m 2 The density of emergent plants is 45 plants / m 2 , the density of floating leaf plants is 45 plants / m 2 The ecological floating beds are set up at equal intervals of 60m along the direction of river flow, and biological wax blocks are tied around the ecological floating beds.

[0120] The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0121] Among them, fish are omnivorous and filter feeders.

[0122] Among them, benthic animals are snails and shellfish.

[0123] Among them, the shrimp is green shrimp.

[0124] Among them, the algae-eating zooplankton are mainly filter-feeding zooplankton, such as rotifers and cladocerans.

[0125] Embodiment 6

[0126] The technical solution of the present invention is: an ecological restoration method for black and smelly rivers, comprising the following steps:

[0127] Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river;

[0128] Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage;

[0129] Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape;

[0130] Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions;

[0131] Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment;

[0132] Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system;

[0133] Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river;

[0134] Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

[0135] The dosage of flocculant in step 1 is 12g / m 2 The oxidant was added 7 days after the flocculant was added, and the amount of oxidant added was 10g / m 2 .

[0136] The soil conditioner in step 5 is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, grass soil and microbial liquid in a mass ratio of 30:18:40:1, and the amount of soil conditioner added is 15g / m 2 The curing agent is added 5 days after the soil conditioner is added, and the amount of curing agent added is 8g / m 2 .

[0137] In step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating-leaf plants are planted at the bends of the river channel, and an ecological floating bed is set up on the water surface in the river channel.

[0138] The planting density of submerged plants is 75 plants / m 2 The density of emergent plants is 45 plants / m 2 , the density of floating leaf plants is 50 plants / m 2 The ecological floating beds are set up at equal intervals of 60m along the direction of river flow, and biological wax blocks are tied around the ecological floating beds.

[0139] The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

[0140] Among them, fish are omnivorous and filter feeders.

[0141] Among them, benthic animals are snails and shellfish.

[0142] Among them, the shrimp is green shrimp.

[0143] Among them, the algae-eating zooplankton are mainly filter-feeding zooplankton, such as rotifers and cladocerans.

[0144] The results of the above-mentioned embodiment for treating black and smelly rivers were tested at 2 months, 6 months, 12 months and 24 months respectively. The test results are as follows: Figure 1-4 As shown, the black and smelly river channel was tested before treatment. The test results before treatment were: ammonia nitrogen 340mg / L, transparency 5cm, COD122mg / L. Through the water quality test after treatment, it can be seen that the treatment effect on the black and smelly river channel is obvious, the time limit is long, and the water quality effect is getting better and better.

[0145] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0146] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for ecological restoration of black and smelly rivers, characterized in that: The following steps are involved: Step 1: Water purification: Add flocculants and oxidants into the river to purify the water quality of the river; Step 2: River channel desilting: Use desilting equipment to remove silt and debris from the bottom of the river channel, restore the river channel to its normal water depth and water flow capacity, and intercept sewage; Step 3: River channel repair: regulate the river channel, widen the river channel and straighten the bends according to local conditions, and complete the adjustment and improvement of the riverbed, riverbank and river channel shape; Step 4: River channel slope protection: Repair and reinforce the slopes on both sides of the river channel, and adopt concrete slope protection and ecological vegetation slope protection methods according to local conditions; Step 5: Sediment remediation: Add soil conditioners and solidifying agents to the riverbed to repair and stabilize the sediment; Step 6: Ecological restoration: Plant aquatic plants and release aquatic animals in the river to build an aquatic animal restoration system; Step 7: Aeration and oxygenation: Use micro-nano aeration to increase the dissolved oxygen in the river water and repair the black and smelly water in the river; Step 8. Flow control: Build a dam upstream of the river to control the water flow in the river and improve river flow regulation.

2. The ecological restoration method for a black and smelly river according to claim 1, characterized in that: The dosage of flocculant in step 1 is 8-12 g / m 2 The oxidant is added 5 to 7 days after the flocculant is added, and the amount of oxidant added is 6 to 10 g / m 2 .

3. The ecological restoration method for a black and smelly river according to claim 1, characterized in that: In the step 5, the soil conditioner is prepared by mixing and fermenting biological activated carbon, disodium hydrogen phosphate, plant soil and microbial culture liquid in a mass ratio of 20-30:12-18:30-40:1, and the amount of the soil conditioner added is 10-15 g / m2. The solidifying agent is added 3-5 days after the soil conditioner is added, and the amount of the solidifying agent added is 5-8 g / m2.

4. The ecological restoration method for a black and smelly river according to claim 1, characterized in that: In the step six, submerged plants are planted at the bottom of the river channel, emergent plants are planted in shallow water 0.3m below the water surface on both sides of the river channel, floating leaf plants are planted at the bends of the river channel, and an ecological floating bed is set on the water surface in the river channel.

5. The ecological restoration method for a black and smelly river according to claim 4, characterized in that: The planting density of the submerged plants is 55 to 75 plants / m 2 The density of emergent plants is 35 to 45 plants / m 2 , the density of floating leaf plants is 40 to 50 plants / m 2 The ecological floating bed is set at equal intervals of 50 to 60 meters along the direction of river flow, and biological wax blocks are tied around the ecological floating bed.

6. The ecological restoration method for a black and smelly river according to claim 1, characterized in that: The aquatic animals released in step six include fish, benthic animals, shrimps and algae-eating zooplankton.

7. The ecological restoration method for a black and smelly river according to claim 6, characterized in that: The fish are omnivorous and filter feeders.

8. The ecological restoration method for a black and smelly river according to claim 6, characterized in that: The benthic animals are snails and shellfish.

9. The ecological restoration method for a black and smelly river according to claim 6, characterized in that: The shrimps are green shrimps.

10. The ecological restoration method for a black and smelly river according to claim 6, characterized in that: The algae-eating zooplankton is a filter-feeding zooplankton mainly composed of rotifers and cladocerans.

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