CN111005345A - Ecological water system restoration construction method - Google Patents
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- CN111005345A CN111005345A CN201911219320.5A CN201911219320A CN111005345A CN 111005345 A CN111005345 A CN 111005345A CN 201911219320 A CN201911219320 A CN 201911219320A CN 111005345 A CN111005345 A CN 111005345A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quay walls; Groynes; Breakwaters Wave dissipating walls; Quay equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
Abstract
The invention discloses an ecological water system restoration construction method, relates to the technical field of water conservancy science, and provides the following scheme aiming at the problem that the ecological system is easily damaged by the existing river management technology, wherein the scheme comprises the following steps: the method comprises the steps of protecting the ecological space of river water, protecting natural river states, protecting river ecological sensitive areas, restoring river habitats, ecologically transforming hard flood control dams, building ecological flood control projects, protecting natural landscapes of rivers, protecting water culture, building hydrophilic landscapes, guaranteeing river channel base flows, improving water quality of river channels, promoting circulation of river channel water systems and ecologically transforming canalized river channels. The safe ecological water system construction based on multi-target coupling belongs to domestic initiatives, and the ecological design concept is novel and unique, and the technical method is integrated and innovated.
Description
Technical Field
The invention relates to the technical field of water conservancy science, in particular to a method for restoring and constructing an ecological water system.
Background
Characteristics of natural geography and rivers in Fujian province: (1) dividing eight mountains into one water and one field: fujian is called as 'eight mountains, one water and one field', the number of people is large, the plain is concentrated in coastal areas, rivers are mainly mountain rivers, and fields are mainly terraced fields; (2) natural disasters are frequent: the natural disasters of the Fujian are frequent, the natural disasters such as typhoons, floods, drought, storm tides and the like exist almost every year, and the disasters frequently occur simultaneously or alternately, so that the four characteristics are presented: one is the duration of the calendar. The season is spring rain and strong convection weather, the season is plum rain and rainy in 5-6 months, and the season is typhoon in 7-9 months (at latest 11 months). The flood control and disaster resistance are under the tension in half of the whole year; secondly, the frequency is high, large magnitude floods occur once every 2 years on average, severe drought occurs once every 3 years, 4-5 typhoons for logging or influencing the Fujian province are all generated, thirdly, the intensity is high, the rainfall is large, the water level is high, and the floods swell and fall rapidly and are suddenly short of defense. And fourthly, the disaster is serious. One line in flood and one large piece in drought cause great economic loss; (3) and (3) flowing into the sea alone: rivers are densely covered and flow into the sea only. 740 rivers with the area of the drainage basin of Fujian province over 50 square kilometers are in total length of 24629 kilometers, the rivers frequently originate from the interior of the province and only flow into the sea in the environment of the province, the sources are short and flow rapidly, the flood season is suddenly expanded and falls, the scouring destructive power is large, and the submergence time is short. Due to the characteristic of independent inflow to the sea, rich biological resources are inoculated in the estuary area where the saline water and the freshwater are intersected, particularly, the migratory fishes are various in variety, and most of coastal rivers are fish migration channels; (4) river classification and characteristics: rivers in Fujian provinces are roughly divided into mountain-type rivers, plain-type rivers and coastal rivers. The mountain river is characterized by short source flow, sudden expansion and falling in flood season, large scouring destructive power and short submerging time; the plain river is mainly concentrated on four plains of coastal areas of Fujian, the river network is dense, the ditch branch of a river is vertical and horizontal, the population is concentrated, the water body mobility is poor, and the water quality is generally poor; coastal rivers are mainly concentrated in coastal estuaries and islands, river ecosystems are greatly influenced by monsoon and salt fog, salt water and fresh water in river mouths are intersected, and migratory fishes are numerous and mostly are fish migration channels.
In recent decades, several trends have appeared on river management, one is that flood control safety is excessively enhanced, ecological requirements and requirements of human landscape are neglected, and bending and straightening geometry, excessive hardening, river channel leveling and canalization, river lake reservoir formation, uniform formation and the like are easily caused; secondly, the landscape is over emphasized, the natural law of the river and the flood safety are neglected, the river is easy to be artificially and gardened, and various waterfront landscape facilities cannot be subjected to the inspection of flood; thirdly, the requirement of human land is over emphasized, the river channel is invaded, the river channel is narrowed, the self rule of the river ecosystem is ignored, the ecological function of the river is easy to shrink, the biological diversity is reduced, and the ecological balance is threatened; fourthly, the original ecology is over emphasized, the human needs are neglected, the lives of people are easily injured, and the survival and the development of the people are influenced.
The invention combines the natural geography and river characteristics of the Fujian province and provides an ecological water system restoration construction method suitable for the Fujian geography characteristics to construct a water system with 'river smoothness, clear water, green shore, beautiful landscape, safety and ecology' to build a biological habitat, restore the life of the river and reproduce the vitality of the river basin.
Disclosure of Invention
In order to achieve the purpose, the invention adopts the following technical scheme:
an ecological water system restoration construction method comprises the following steps:
s1, protecting the river water ecological space: a river course shoreline and a river bank ecological protection blue line are defined, a natural section at the upstream of a river protects the natural river course by defining the shoreline blue line for the current natural ecology, and the river flows through a farmland section to protect the stabilized revetment;
s2, protecting the natural river: protecting naturally curved river shorelines, deep ponds, shoals, flood landings, gravels, waterweeds, estuary continents and revetment forests, protecting ecological spaces and ecological galleries of habitats of various water areas, strictly forbidding occupying river beach lands, cutting bends to take straight, filling rivers and changing lanes;
s3, protecting the river ecological sensitive area: the method comprises the following steps of protecting a drinking water source area, a fish field, aquatic germplasm resources, rare protective species, a water conservancy scenic spot, a water source conservation forest and a water and soil conservation forest;
s4, restoring the river habitat: adopting an ecological buffer zone, an artificial wetland, a proliferation and discharge or an ecological grass ditch to intercept and purify non-point source pollution so as to perfect a river biological chain, construct a spatial, three-dimensional, continuous and stable ecological environment and enrich the biological species diversity of the river;
s5, performing ecological reconstruction on the hard flood bank: performing ecological reconstruction on the built hard embankment and revetment: if the land is allowed after the dike, the hard dike and the revetment are dismantled to be reformed into the ecological revetment; if the land is tense behind the bank, a fish nest is additionally arranged at the position of the hard revetment near the water surface for foot protection, and an ecological frame and an ecological concrete softened retaining wall are additionally arranged near the water surface;
s6, ecological flood control engineering construction: constructing an ecological bank protection according to the principles of scour prevention and non-flood prevention on a top impact section and an easily damaged section; the river flows through the village section, and an ecological revetment is built according to the scour prevention and non-flood prevention principle; rivers flow through the town section and the urban area section to build an ecological embankment;
s7, protecting the natural features of the river by adopting an ecological construction process: the existing natural vegetation and the human landscape are protected, and large-scale machinery is prevented from entering a construction site; raw stones and sand of the river channel cannot be taken in situ; construction waste materials and wastes are recycled, soil and slag are not discarded at will, and greening is carried out in time after construction is finished to recover vegetation;
s8, protecting water culture: protecting rivers, coast ancient wavers, ancient ferrys, ancient docks, ancient bridges, ancient dikes and ancient trees name trees, establishing protective marks, perfecting supporting facilities and keeping the original vein characteristics;
s9, carrying out ecological reconstruction on the river blocking facilities: for the part of river blocking facilities causing the problems of little water flow break, siltation and fish migration resistance, ecological transformation of ecological shoals, overflow weirs, flap dams or fish passing facilities is adopted to build the river blocking facilities which have water surfaces, flow, are silted and communicated, can pass fishes and have landscape, and the longitudinal connectivity of the river water body is kept;
s10, construction of the hydrophilic landscape: in villages, villages and towns with concentrated population and river sections in urban areas, a safe, low-disturbance and low-investment hydrophilic facility is selected to construct a human landscape, and the hydrophilic facility should avoid river top rushing sections, trees and farmlands; the hydrophilic facilities of the river reach in the country are closely integrated with agricultural production and agricultural facilities by combining with agricultural measures;
s11, guaranteeing river channel base flow: aiming at rivers with a dewatering section, measures of power station unit ecological transformation, old small hydropower station withdrawal, basin step reservoir power station ecological scheduling or ecological electricity price compensation are adopted to ensure minimum discharge flow, so that constant flow water exists in the river channel, and the living and inhabiting environment of aquatic animals and plants is protected; aiming at the lack of ecological basic flow, the water ecological sensitive protection target exists, clean water sources are arranged at the periphery of the water ecological sensitive protection target, and real-time ecological water supplement is realized under the water diversion condition;
s12, improving the river water quality: the method adopts the measures of intercepting a sewage source, treating a sewage discharge outlet entering a river and purifying in situ in a wetland to reduce the river entering amount of pollutants so as to ensure that the water quality of the river reaches the water quality standard of a water functional area;
s13, promoting circulation of the river water system: the method of water transfer and drainage, desilting and widening and opening of the broken river or building a communication channel is adopted, so that dead water river sections and broken river sections are eliminated, the water body fluidity of the river channel is increased, and the hydraulic connection of the river channel is enhanced;
s14, performing ecological reconstruction on the canalized river channel: and (4) dismantling the canalized river channel, withdrawing the dike, returning the river, and restoring the beach to restore the flood discharge space and the natural river state of the river channel.
Preferably, the hydrophilic facility is a corridor frame, a pavilion or a patrol channel, and the corridor frame and the pavilion are arranged above a flood level in five years and are not in top-impact sections; the patrol roads are arranged above the flood level in two years as much as possible.
Preferably, the arrangement of the patrol roads is in accordance with the original landform, the road surface with good water permeability is selected, and the part of the patrol roads adopts a low overhead type footpath or an overhead type trestle.
Preferably, the hydrophilic landscape selects native trees and grass seeds, and native trees and grass seeds which are properly grown and low in maintenance are selected according to the characteristics of a river water system and the combination of the local natural conditions; wind-resistant, barren-resistant and saline-alkali-resistant plants are preferably considered in coastal rivers; the plants are preferably planted in seasons conducive to their survival and growth.
Preferably, the ecological revetment is of a section type, and further preferably adopts one of a combined type, a wide-shallow type or a slope type, and the newly-built river bank is favorable for water exchange between a river and a beach, so that the requirement of biological life habits is met.
Preferably, the three fish farms are a spawning farm, a bait-rigging farm, an overwintering farm and a migration channel together.
Compared with the prior art, the invention has the beneficial effects that:
according to the river bank characteristics of mountain-type rivers with top rushing and non-top rushing in Fujian province, the water level fluctuation characteristics in the dry season of flood season and the distribution characteristics of water ecological sensitive areas, the river bank type, the arrangement region of important waterfront landscape facilities, the important river ecological space protection objects and the like are selected according to the construction principles of scour prevention, non-flood prevention, integral protection local construction, first definition of a river bank line and a river bank ecological protection blue line and the like, and the river management method which is safe, ecological and easy to implement in a coordinated mode is provided, so that the safety, the ecological performance, the scientificity and the uniformity of river management are improved; the safe ecological water system construction based on multi-target coupling provided by the invention belongs to the domestic initiative, the ecological design concept is novel and unique, the technical method is integrated and innovated, and the construction achievement and experience of the safe ecological water system have popularization and reference values for national river channel ecological management and river basin comprehensive management.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
The ecological water system is constructed by aiming at perennial running water, clear water, bank protection forest belts, wild interest, countryside, safe river banks, natural river states, rich organisms and a management and protection mechanism; to achieve the above purpose, taking the Lonicera gracilis of Fujian as an example, the area of the Lonicera gracilis stream is 1732km2In the regions such as the tourist county, the urban area, the lychee district, the culvert area and the like flowing through the Pu field city, the upstream mainly comprises mountainous areas, hills, valleys and the like, and the downstream mainly comprises impact plains and partial hilly terrace lands, the ecological water system restoration construction method is implemented:
s1, protecting the river water ecological space: a river course shoreline and a river bank ecological protection blue line are defined, a natural section at the upstream of a river protects the natural river course by defining the shoreline blue line for the current natural ecology, and the river flows through a farmland section to protect the stabilized revetment;
s2, protecting the natural river: protecting naturally curved river shorelines, deep ponds, shoals, flood landings, gravels, waterweeds, estuary continents and revetment forests, protecting ecological spaces and ecological galleries of habitats of various water areas, strictly forbidding occupying river beach lands, cutting bends to take straight, filling rivers and changing lanes;
s3, protecting the river ecological sensitive area: the method comprises the following steps of protecting a drinking water source area, a fish field, aquatic germplasm resources, rare protective species, a water conservancy scenic spot, a water source conservation forest and a water and soil conservation forest;
s4, restoring the river habitat: adopting an ecological buffer zone, an artificial wetland, a proliferation and discharge or an ecological grass ditch to intercept and purify non-point source pollution so as to perfect a river biological chain, construct a spatial, three-dimensional, continuous and stable ecological environment and enrich the biological species diversity of the river;
s5, performing ecological reconstruction on the hard flood bank: performing ecological reconstruction on the built hard embankment and revetment: if the land is allowed after the dike, the hard dike and the revetment are dismantled to be reformed into the ecological revetment; if the land is tense behind the bank, a fish nest is additionally arranged at the position of the hard revetment near the water surface for foot protection, and an ecological frame and an ecological concrete softened retaining wall are additionally arranged near the water surface;
s6, ecological flood control engineering construction: constructing an ecological bank protection according to the principles of scour prevention and non-flood prevention on a top impact section and an easily damaged section; the river flows through the village section, and an ecological revetment is built according to the scour prevention and non-flood prevention principle; rivers flow through the town section and the urban area section to build an ecological embankment;
s7, protecting the natural features of the river by adopting an ecological construction process: the existing natural vegetation and the human landscape are protected, and large-scale machinery is prevented from entering a construction site; raw stones and sand of the river channel cannot be taken in situ; construction waste materials and wastes are recycled, soil and slag are not discarded at will, and greening is carried out in time after construction is finished to recover vegetation;
s8, protecting water culture: protecting rivers, coast ancient wavers, ancient ferrys, ancient docks, ancient bridges, ancient dikes and ancient trees name trees, establishing protective marks, perfecting supporting facilities and keeping the original vein characteristics;
s9, carrying out ecological reconstruction on the river blocking facilities: for the part of river blocking facilities causing the problems of little water flow break, siltation and fish migration resistance, ecological transformation of ecological shoals, overflow weirs, flap dams or fish passing facilities is adopted to build the river blocking facilities which have water surfaces, flow, are silted and communicated, can pass fishes and have landscape, and the longitudinal connectivity of the river water body is kept;
s10, construction of the hydrophilic landscape: in villages, villages and towns with concentrated population and river sections in urban areas, a safe, low-disturbance and low-investment hydrophilic facility is selected to construct a human landscape, and the hydrophilic facility should avoid river top rushing sections, trees and farmlands; the hydrophilic facilities of the river reach in the country are closely integrated with agricultural production and agricultural facilities by combining with agricultural measures;
s11, guaranteeing river channel base flow: aiming at rivers with a dewatering section, measures of power station unit ecological transformation, old small hydropower station withdrawal, basin step reservoir power station ecological scheduling or ecological electricity price compensation are adopted to ensure minimum discharge flow, so that constant flow water exists in the river channel, and the living and inhabiting environment of aquatic animals and plants is protected; aiming at the lack of ecological basic flow, the water ecological sensitive protection target exists, clean water sources are arranged at the periphery of the water ecological sensitive protection target, and real-time ecological water supplement is realized under the water diversion condition;
s12, improving the river water quality: the method adopts the measures of intercepting a sewage source, treating a sewage discharge outlet entering a river and purifying in situ in a wetland to reduce the river entering amount of pollutants so as to ensure that the water quality of the river reaches the water quality standard of a water functional area;
s13, promoting circulation of the river water system: the method of water transfer and drainage, desilting and widening and opening of the broken river or building a communication channel is adopted, so that dead water river sections and broken river sections are eliminated, the water body fluidity of the river channel is increased, and the hydraulic connection of the river channel is enhanced;
s14, performing ecological reconstruction on the canalized river channel: and (4) dismantling the canalized river channel, withdrawing the dike, returning the river, and restoring the beach to restore the flood discharge space and the natural river state of the river channel.
The hydrophilic facilities are corridor frames, pavilions or inspection ways, and the corridor frames and the pavilions are arranged above the flood level in five years and are not top-impact sections; the patrol roads are arranged above the flood level in two years as much as possible; the arrangement of the patrol roads is in accordance with the original landform, a road surface with good water permeability is selected, and a low overhead type footpath or an overhead type trestle is locally adopted; the hydrophilic landscape selects native trees and grass seeds, and native trees and grass seeds which are properly grown and low in maintenance are selected according to the characteristics of a local river water system and in combination with local natural conditions; wind-resistant, barren-resistant and saline-alkali-resistant plants are preferably considered in coastal rivers; the plants are preferably planted in seasons which are favorable for the survival and growth of the plants; the ecological bank protection is in a section type, one of a composite type, a wide-shallow type or a slope type is further preferably adopted, and the newly-built river bank is favorable for exchanging water bodies of rivers and beaches, so that the requirement of biological life habits is met; the first fish farm is a spawning ground, a bait-fishing ground, an overwintering ground and a migration channel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. An ecological water system restoration construction method is characterized by comprising the following steps:
s1, protecting the river water ecological space: a river course shoreline and a river bank ecological protection blue line are defined, a natural section at the upstream of a river protects the natural river course by defining the shoreline blue line for the current natural ecology, and the river flows through a farmland section to protect the stabilized revetment;
s2, protecting the natural river: protecting naturally curved river shorelines, deep ponds, shoals, flood landings, gravels, waterweeds, estuary continents and revetment forests, protecting ecological spaces and ecological galleries of habitats of various water areas, strictly forbidding occupying river beach lands, cutting bends to take straight, filling rivers and changing lanes;
s3, protecting the river ecological sensitive area: the method comprises the following steps of protecting a drinking water source area, a fish field, aquatic germplasm resources, rare protective species, a water conservancy scenic spot, a water source conservation forest and a water and soil conservation forest;
s4, restoring the river habitat: adopting an ecological buffer zone, an artificial wetland, a proliferation and discharge or an ecological grass ditch to intercept and purify non-point source pollution so as to perfect a river biological chain, construct a spatial, three-dimensional, continuous and stable ecological environment and enrich the biological species diversity of the river;
s5, performing ecological reconstruction on the hard flood bank: performing ecological reconstruction on the built hard embankment and revetment: if the land is allowed after the dike, the hard dike and the revetment are dismantled to be reformed into the ecological revetment; if the land is tense behind the bank, a fish nest is additionally arranged at the position of the hard revetment near the water surface for foot protection, and an ecological frame and an ecological concrete softened retaining wall are additionally arranged near the water surface;
s6, ecological flood control engineering construction: constructing an ecological bank protection according to the principles of scour prevention and non-flood prevention on a top impact section and an easily damaged section; the river flows through the village section, and an ecological revetment is built according to the scour prevention and non-flood prevention principle; rivers flow through the town section and the urban area section to build an ecological embankment;
s7, protecting the natural features of the river by adopting an ecological construction process: the existing natural vegetation and the human landscape are protected, and large-scale machinery is prevented from entering a construction site; raw stones and sand of the river channel cannot be taken in situ; construction waste materials and wastes are recycled, soil and slag are not discarded at will, and greening is carried out in time after construction is finished to recover vegetation;
s8, protecting water culture: protecting rivers, coast ancient wavers, ancient ferrys, ancient docks, ancient bridges, ancient dikes and ancient trees name trees, establishing protective marks, perfecting supporting facilities and keeping the original vein characteristics;
s9, carrying out ecological reconstruction on the river blocking facilities: for the part of river blocking facilities causing the problems of little water flow break, siltation and fish migration resistance, ecological transformation of ecological shoals, overflow weirs, flap dams or fish passing facilities is adopted to build the river blocking facilities which have water surfaces, flow, are silted and communicated, can pass fishes and have landscape, and the longitudinal connectivity of the river water body is kept;
s10, construction of the hydrophilic landscape: in villages, villages and towns with concentrated population and river sections in urban areas, a safe, low-disturbance and low-investment hydrophilic facility is selected to construct a human landscape, and the hydrophilic facility should avoid river top rushing sections, trees and farmlands; the hydrophilic facilities of the river reach in the country are closely integrated with agricultural production and agricultural facilities by combining with agricultural measures;
s11, guaranteeing river channel base flow: aiming at rivers with a dewatering section, measures of power station unit ecological transformation, old small hydropower station withdrawal, basin step reservoir power station ecological scheduling or ecological electricity price compensation are adopted to ensure minimum discharge flow, so that constant flow water exists in the river channel, and the living and inhabiting environment of aquatic animals and plants is protected; aiming at the lack of ecological basic flow, the water ecological sensitive protection target exists, clean water sources are arranged at the periphery of the water ecological sensitive protection target, and real-time ecological water supplement is realized under the water diversion condition;
s12, improving the river water quality: the method adopts the measures of intercepting a sewage source, treating a sewage discharge outlet entering a river and purifying in situ in a wetland to reduce the river entering amount of pollutants so as to ensure that the water quality of the river reaches the water quality standard of a water functional area;
s13, promoting circulation of the river water system: the method of water transfer and drainage, desilting and widening and opening of the broken river or building a communication channel is adopted, so that dead water river sections and broken river sections are eliminated, the water body fluidity of the river channel is increased, and the hydraulic connection of the river channel is enhanced;
s14, performing ecological reconstruction on the canalized river channel: and (4) dismantling the canalized river channel, withdrawing the dike, returning the river, and restoring the beach to restore the flood discharge space and the natural river state of the river channel.
2. The ecological water system restoration construction method according to claim 1, wherein the hydrophilic facility is a corridor, a pavilion or a patrol, and the corridor and the pavilion are arranged above a flood level in five years and are not in a top-flushing section; the patrol roads are arranged above the flood level in two years as much as possible.
3. The ecological water system restoration construction method according to claim 2, wherein the arrangement of the patrol roads is in accordance with the original landscape, a road surface with good water permeability is selected, and a low-overhead type footpath or an overhead type trestle is locally adopted.
4. The ecological water system restoration construction method according to claim 1, wherein the hydrophilic landscape is selected from native trees and grass, native trees and grass are selected for proper growth and low maintenance according to the characteristics of the river water system and the natural conditions, wind-resistant, barren-resistant, saline-alkali-resistant plants are preferably considered in the coastal river, and plants are preferably selected in the seasons favorable for the survival and growth of plants.
5. The method for restoring an ecological water system according to claim 1, wherein the ecological bank protection is of a sectional type, preferably a composite type, a wide shallow type or a slope type, and the newly-built river bank is favorable for exchanging water between rivers and beaches to meet the requirements of biological life habits.
6. The ecological water system restoration construction method according to claim 1, wherein one of the three fish farms is a spawning ground, a bait-demanding ground, an overwintering ground and a migration channel.
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