Fish passing facility comparison and selection method

Abstract

The invention discloses a fish passing facility comparison and selection method. The method comprises the steps of: 1, collecting data; 2, determining a fish passing object; 3, determining a fish passing season; 4, analyzing habitat suitability; 5, preliminary comparison and selection of fish passing facilities: selecting two or more than two fish passing facilities from the fish passing facilitycomparison list as to-be-selected fish passing facilities; 6, determining a fish passing facility comparison, selection and scoring list; and 7, comparing and selecting the fish passing facilities again: carrying out index scoring operation on each to-be-selected fish passing facility which is preliminarily compared and selected in the step; according to the fish passing facility comparison and selection scoring list in the step 7, multiplying a scores obtained by each index scoring list by the weight coefficient of the index, to obtain a result which is the final score of the to-be-selected fish passing facility, and the to-be-selected fish passing facility with the highest final score serving as the selected fish passing facility. The selected fish passing facility is more scientific, sothat the damage of the hydraulic structure to the fish habitat is relieved.

Description

technical field [0001] The invention relates to the field of water environment ecological protection and water conservancy projects, in particular to a method for comparing and selecting fish passing facilities. Background technique [0002] A series of hydraulic structures built in rivers will have a series of adverse effects on aquatic ecosystems, among which fish habitats have been severely damaged. Water retaining structures such as weirs and dams not only change the hydrological conditions of the upstream and downstream, but also block the continuity of the river, preventing fish from migrating freely and affecting their foraging and reproduction. [0003] In order to reduce this impact, fish protection measures must be taken to help fish return to their normal living environment. Permanent river blocking structures such as retaining dams and overflow dams will destroy the longitudinal continuity of the river, destroy the integrity of the river and the aquatic habitat,...

AI Technical Summary

Problems solved by technology

Many people think that the construction of fishways to protect common fish is "not cost-effective", and they have no awareness of protecting the diversity and integrity of aquatic biodiversity, which leads to insufficient maintenance funds and affects the good operation of fishways

[0007] (2) Lack of research on fish characteristics, research on hydraulics of fish passing facilities, and serious lack of basic data

[0008] (3) When the fish to be protected in the same area are different, due to the different swimming abilities of different fish, their allowable flow rates are also different, and it is difficult for fish passing facilities to meet different allowable flow rates at the same time

[0009] (4) Lack of research on the physiological characteristics and living habits of fish

[0010] (5) Insufficient supervision of fish passing facilities after construction

Images