Method and device for determining fish migration ecological flow

A technology for ecological flow and fish, applied in measuring devices, instruments, electrical digital data processing, etc., can solve the problem of low accuracy, failure to consider hydrological conditions, failure to consider whether the target species can reach the spawning ground, etc. problem, to achieve the effect of improving accuracy

Pending Publication Date: 2021-10-01
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
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Problems solved by technology

[0004] The method of incremental flow in the river in the prior art only evaluates the suitable habitat area for fish, but does not consider whether the target species can reach the spawning ground smoothly, that is, it does not consider the migration process of fish and its migration process. The required hydrological conditions lead to inaccurate results when calculating the ecological flow of the river during fish migration

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  • Method and device for determining fish migration ecological flow
  • Method and device for determining fish migration ecological flow
  • Method and device for determining fish migration ecological flow

Examples

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Embodiment 1

[0056] figure 1 A schematic flow diagram of a method for determining the ecological flow rate of fish migration provided by the embodiment of the present invention, such as figure 1 As shown, the method for determining the fish migration ecological flow provided by the present embodiment includes the following steps:

[0057] S101: According to the field observation or indoor experiment of the fishes to be studied, explore the hydrological conditions for their migration stimulation, and respectively establish the fish migration flow velocity suitability curve and the fish migration water depth suitability curve corresponding to the fishes to be studied.

[0058] Among them, the fish migration velocity suitability curve is used to indicate the relationship between fish migration velocity and fitness, and the fish migration water depth suitability curve is used to indicate the relationship between fish migration water depth and fitness.

[0059] It should be noted that the fish...

Embodiment 2

[0086] Figure 6 A schematic flow chart of another method for determining the ecological flow rate of fish migration provided by the embodiment of the present invention, such as Figure 6 As shown, the method for determining the fish migration ecological flow provided by the present embodiment includes the following steps:

[0087] S601: According to the total length of the suitable river for fish migration and the fish migration speed of the fish to be studied, determine the duration of the ecological flow of fish migration.

[0088] It should be noted that after the ecological flow required for fish migration is determined, the ecological flow process of fish migration can also be established. It is necessary to determine the fish migration speed of the fish to be studied, and then according to the total length of the suitable river channel for fish migration and The fish migration speed of the fish to be studied is determined to determine the duration of the fish migration...

Embodiment 3

[0093] Figure 8 A structural schematic diagram of a device for determining the ecological flow rate of fish migration provided by the embodiment of the present invention, such as Figure 8 As shown, the fish migration ecological flow determination device 80 provided in this embodiment includes: a curve building module 801 , a model building module 802 , and a processing module 803 .

[0094] Among them, the curve building module 801 is used to explore the hydrological conditions of the fish migration stimulation according to the field observation or indoor experiment of the fish to be studied, and respectively establish the fish migration velocity suitability curve and the fish migration water depth suitability curve corresponding to the fish to be studied curve;

[0095] The model building module 802 is used to establish a hydrodynamic model according to the river network information of the river where the fish to be studied and the section information of the river;

[009...

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Abstract

The embodiment of the invention provides a method and device for determining fish migration ecological flow, according to field observation or indoor experiments of to-be-studied fish, migration stimulation hydrological conditions of the to-be-studied fish are explored, and a fish migration flow velocity suitability curve and a fish migration water depth suitability curve corresponding to the to-be-studied fish are established; a hydrodynamic model according to the river network information of the river channel where the to-be-studied fish is located and the section information of the river channel; according to the fish migration flow velocity suitability degree curve, the fish migration water depth suitability degree curve and the hydrodynamic simulation result, the total length of the fish migration suitable river channel under different flows is calculated; and a mapping relation is created between the total length of the fish migration suitable river channel and the flow, and the fish migration ecological flow is determined according to the mapping relation between the total length of the fish migration suitable river channel and the flow. The migration process of the fish and the hydrological conditions required in the migration process are considered, so that the accuracy of a calculation result is improved when the river ecological flow in the fish migration process is calculated.

Description

technical field [0001] The invention relates to the technical field of river ecological flow research, in particular to a method and device for determining the ecological flow of fish migration. Background technique [0002] Fish are the key indicator species for river ecological protection and restoration. Quantifying the hydrodynamic demands of fish life history and establishing the corresponding ecohydrological relationship are the basis for developing a method for calculating river ecological flow with physical mechanisms. [0003] Among the existing calculation methods of river ecological flow based on the hydrological demands of fishes, the theory and method of physical habitat modeling represented by Instream Flow Incremental Methodology (IFIM) dominates. Evaluate the quantity and quality of suitable habitats for each life stage of the target species under different flow conditions in the river, and then obtain the suitable ecological flow of the river in different pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G01D21/02G06F113/08G06F119/14
CPCG01D21/02
Inventor 胡鹏杨泽凡王伟泽曾庆慧刘欢潘剑光
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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