A method for mimicking tides to regulate high tide levels in migratory waterbirds

Abstract

This invention proposes to divide the waterbird high tide regulation zone into water storage and release areas, and to set up inlet and outlet water inlets, habitat areas, etc., and to match the corresponding water level control methods. This can realize the simulation of tides to improve the water exchange rate, enhance the wetland food source and multi-habitat supply, and benefit migratory waterbirds to stop, forage and roost.

Description

Technical Field

[0001] This invention relates to the field of ecological restoration of wetland waterbird habitats, and specifically to a method for tidal-simulated modification of high tide regulation zones for migratory waterbirds. Background Technology

[0002] Existing migratory waterbird routes from Siberia to Australia have seen a reduction in traditional stopover sites due to land reclamation, aquaculture, and the invasion of Spartina alterniflora. Furthermore, disturbances from industrial and agricultural production, residential life, and tourism have led to insufficient resting and resupply at these traditional stopover sites during high tide. To alleviate this situation, some areas have leased out portions of reclaimed aquaculture areas to convert them into high tide regulation zones for migratory waterbirds, lowering (drying) water levels during the migration season to provide resting and resupply opportunities. However, this has resulted in low water exchange rates, reduced wetland ecological functions, limited wetland flora and fauna for waterbird resupply, and a lack of habitat diversity, making it difficult to meet the needs of various migratory waterbirds, such as waterfowl, for resting, foraging, and roosting. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a method for mimicking tidal changes in high tide regulation zones for migratory waterbirds. By modifying the regulation zones and controlling water levels, tidal water exchange can be achieved, thereby improving the food supply in wetlands. Simultaneously, the rich habitat created by the combination of multiple water levels and systems can provide a wider range of migratory waterbirds with places to rest, forage, and roost.

[0004] To achieve the above objectives, the present invention proposes the following technical solution: A method for tidal-simulated modification of high tide regulation zones for migratory waterbirds, comprising the following steps: Step 1: Divide the high tide regulation zone for migratory waterbirds into water storage area 1 and water release area 2; Step 2: The water storage area 1 is provided with a one-way inlet 11 for seawater to enter the water storage area 1, the water storage area 1 is provided with a one-way outlet 12 for water to be discharged into the water discharge area 2, and the water discharge area 2 is provided with a one-way outlet 21 for water to be discharged into the sea. Step 3: The water storage area 1 is equipped with a tidal channel 13 from a one-way inlet 11 to a one-way outlet 12; the water storage area 1 is equipped with a habitat island 14; the water release area 2 is equipped with a drainage channel 22 from a one-way outlet 12 to a one-way outlet 21; the water release area 2 is equipped with a resting island 23. Step 4: When the tide level is lower than the set tide level elevation, maintain the water release zone 2 at the specific water release level elevation; when the tide level is higher than the set tide level elevation, set the bottom elevation of the regulation zone to zero, and maintain the water release zone 2 at zero water level. The water storage zone 1 is maintained at a level not lower than the specific water storage level.

[0005] The area ratio of the water storage area 1 to the water release area 2 is 1-3:7-8; the area ratio of the tidal channel 13, habitat island 14 and water storage area 1 is 1-3:1-2:8-10; the area ratio of the water release channel 22, resting island 23 and water release area 2 is 1-3:1-2:8-10.

[0006] The bottom elevation of the tidal channel 13 is below -0.5m; the top elevation of the habitat island 14 is between 0.1 and 0.5m above the highest tide level; the bottom elevation of the discharge channel 22 is below -0.3m; the top elevation of the resting island 23 is between 0.1 and 0.3m above the specific discharge level; the set tide level elevation is between -0.5 and -2m; the specific discharge level elevation is between 0 and 0.5m; and the specific storage level elevation is between 0.2 and 0.5m.

[0007] The island surface construction materials of habitat island 14 and resting island 23 include soil, sand, stone, grass, bamboo and wood piles, and related combinations.

[0008] The one-way inlet 11 is further provided with a one-way (snake) net, and the one-way outlet 21 is further provided with an isolation net.

[0009] This invention proposes a water bird high tide regulation zone with water storage area 1 and water release area 2, as well as water inlet, ditch, island setting and water level control methods, which can improve the water exchange rate and enhance the wetland food supply level by mimicking tides. The habitat with multiple water levels and textures can provide more species of migratory waterbirds with places to stop, forage and roost. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the modification process of the present invention.

[0011] Figure 2 This is a schematic cross-sectional view of a modified adjustment zone according to the present invention.

[0012] Figure 3 This is a bird's-eye view of the invention. Detailed Implementation

[0013] The purpose of this invention is to provide a method for tidal-like modification of waterbird high tide regulation zones to solve the problems existing in the prior art. By modifying the regulation zone and controlling water exchange, tidal-like water exchange can be achieved to improve the food supply level of wetland waterbirds. The combination of habitats with multiple water levels and textures can provide more species of migratory waterbirds with places to stop and roost.

[0014] The overall concept of this invention is as follows: the waterbird high tide regulation zone is divided into a water storage zone 1 and a water release zone 2. During high tide, water storage zone 1 stores water, while water release zone 2 releases water for migratory waterbirds to rest and forage. During low tide, water is released from water storage zone 1 to water release zone 2. The retention of tidal organisms in water storage zone 1 and the alternating high and low tides in water release zone 2 can improve the overall biological productivity of the regulation zone. The use of ditches and islands, multiple water level controls, and a combination of various structural materials can accommodate different species of migratory waterbirds for resting and roosting.

[0015] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation details.

[0016] Step 1: Divide the high tide regulation area for migratory waterbirds into a water storage area 1 and a water release area 2, incorporating dikes, sluice gates, etc. The preferred area ratio of water storage area 1 to water release area 2 is 1-3:7-8.

[0017] Step 2: The water storage area 1 is equipped with a one-way inlet 11 for seawater to enter the water storage area 1, and a one-way outlet 12 for water to be discharged into the water discharge area 2. The water discharge area 2 is equipped with a one-way outlet 21 for water to be discharged into the open sea. The one-way inlet 11 is further equipped with a one-way (snake) net, and the one-way outlet 21 is further equipped with a barrier net, which can intercept various aquatic organisms carried by the tidal current in the regulation area for breeding and provide food for migratory waterbirds.

[0018] Step 3: The water storage area 1 is equipped with a tidal channel 13 from a one-way inlet 11 to a one-way outlet 12; the water storage area 1 is equipped with a habitat island 14; the water release area 2 is equipped with a drainage channel 22 from a one-way outlet 12 to a one-way outlet 21; the water release area 2 is equipped with a resting island 23. The bottom elevation of the regulating zone is set to zero. The bottom elevation of the tidal channel 13 is preferably below -0.5m, and the top elevation of the habitat island 14 is preferably 0.1 to 0.5m above the highest tide level. The bottom elevation of the discharge channel 22 is preferably below -0.3m, and the top elevation of the resting island 23 is preferably 0.1 to 0.3m above a specific discharge level. The area ratio of the tidal channel 13, habitat island 14, and water storage area 1 is preferably 1-3:1-2:8-10. The area ratio of the discharge channel 22, resting island 23, and water discharge area 2 is preferably 1-3:1-2:8-10. The setting of the tidal channel 13 and the discharge channel 2 is conducive to aquatic organisms avoiding high temperatures, breeding, and waterfowl inhabiting. The habitat island 14, resting island 23, and the dikes and pond bottoms of the regulating area are constructed using materials including soil, sand, stone, grass, wooden and bamboo piles, and related combinations. The various water levels and material textures provide a suitable environment for various waterfowl, wading birds, plovers, sandpipers, geese, ducks, gulls, and other waterbirds to rest, forage, and roost.

[0019] Step 4: When the tide level is lower than the set tide level elevation, maintain the discharge zone 2 at a specific discharge level elevation; when the tide level is higher than the set tide level elevation, maintain the discharge zone 2 at zero elevation; the storage zone should not be lower than a specific storage level. The set tide level elevation is preferably between -0.5m and -2m; the specific discharge level elevation is preferably between 0 and 0.5m; and the specific storage level elevation is preferably between 0.2 and 0.5m. The corresponding water level control can be set and managed through sensors and automated control sluice gates via hydrological calculations.

Claims

1. A method for mimicking tides to regulate high tide levels in migratory waterbirds, comprising the following steps: Step 1: Divide the high tide regulation zone for migratory waterbirds into water storage area 1 and water release area 2; Step 2: The water storage area 1 is provided with a one-way inlet 11 for seawater to enter the water storage area 1, the water storage area 1 is provided with a one-way outlet 12 for water to be discharged into the water discharge area 2, and the water discharge area 2 is provided with a one-way outlet 21 for water to be discharged into the sea. Step 3: The water storage area 1 is equipped with a tidal channel 13 from a one-way inlet 11 to a one-way outlet 12; the water storage area 1 is equipped with a habitat island 14; the water release area 2 is equipped with a drainage channel 22 from a one-way outlet 12 to a one-way outlet 21; the water release area 2 is equipped with a resting island 23. Step 4: When the tide level is lower than the set tide level elevation, maintain the water release zone 2 at the specific water release level elevation; when the tide level is higher than the set tide level elevation, set the bottom elevation of the regulation zone to zero, and maintain the water release zone 2 at zero water level. The water storage zone 1 is maintained at a level not lower than the specific water storage level.

2. The area ratio of the water storage area 1 to the water release area 2 is 1-3:7-8; the area ratio of the tidal channel 13, habitat island 14 and water storage area 1 is 1-3:1-2:8-10; the area ratio of the water release channel 22, resting island 23 and water release area 2 is 1-3:1-2:8-10.

3. The bottom elevation of the tidal channel 13 is below -0.5m; the top elevation of the habitat island 14 is between 0.1 and 0.5m above the highest tide level; the bottom elevation of the discharge channel 22 is below -0.3m; the top elevation of the resting island 23 is between 0.1 and 0.3m above the specific discharge level; the set tide level elevation is between -0.5 and -2m; the specific discharge level elevation is between 0 and 0.5m; and the specific storage level elevation is between 0.2 and 0.5m.

4. The island surface construction materials of the habitat island 14 and the resting island 23 include soil, sand, stone, grass, bamboo and wood piles, and related combinations.

5. The one-way inlet 11 is further provided with a one-way (snake) net, and the one-way outlet 21 is further provided with an isolation net.

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