Fish habitat dividing method based on geographic and geomorphic conditions

Abstract

The invention discloses a fish habitat dividing method based on geographic and geomorphic conditions. The method mainly comprises steps as follows: (1) the fish habitat dividing boundary range is determined; (2) characteristic fishes and geographic and geomorphic characteristic factors are determined; (3) fish habitats are partitioned; (4) the fish habitats are graded; (5) fish habitat protection measures are classified; (6) quantitative evaluation is performed on fish habitat protection. With the adoption of the method, on the basis of condition requirements of the geographic and geomorphic characteristic factors such as longitudinal morphology of rivers, transverse morphology of the rivers, local morphology of the rivers and the like, according to the dividing principles of fish habitat protection range partitioning, protection degree grading and protection content classification, requirements for protection, repair, compensation and scientific research work of river fish habitats are planned and deployed from the source, river fish habitat protection theories and technical research systems of China are filled and perfected, and the win-win effect of the social benefit, the economic benefit and the environmental benefit is realized.

Description

technical field [0001] The invention belongs to the technical field of fish management, and in particular relates to a method for dividing fish habitats based on topographic conditions. Background technique [0002] Habitat usually refers to the region or environment type in which a certain organism or an ecological group survives and reproduces. In a broad sense, the concept of habitat not only includes the living space of organisms, but also includes all environmental factors in the living space. For fish, its habitat refers to the place where it maintains its normal life, growth, foraging, reproduction and other life cycles, including the range of waters necessary for fish to complete the entire life cycle process, such as spawning grounds, ropes, etc. Bait grounds, overwintering grounds, and migration passages connecting waters of different life history stages, etc. Fish habitats not only provide the living space for fish, but also provide all the environmental factors t...

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Problems solved by technology

At present, most of the protection, restoration, compensation and scientific research of river fish habitats in my country are in the stage of research, conception and design. The research theory and technology system of land protection is still not systematic, and the technology suitable for my country's river reality and national conditions is mature, the protection effect is good, and the examples that are easy to operate and implement are lacking, and the practical guidance for engineering is limited. There is still a gap in technical methods, and it is difficult to achieve an effective unity and balance of environmental benefits, economic benefits, and social benefits

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