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Habitat construction method for benthos in plain rivers

A technology of benthic animals and construction methods, applied in construction, sea area engineering, fish farming, etc., can solve the problems of habitat degradation and biodiversity reduction of benthic animals, and achieve the goal of increasing community diversity and improving habitat quality Effect

Inactive Publication Date: 2019-01-08
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coupled with human overfishing, climate anomalies and other reasons, the habitat quality of benthic animals in plain rivers has declined and the biodiversity has decreased significantly.

Method used

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  • Habitat construction method for benthos in plain rivers
  • Habitat construction method for benthos in plain rivers
  • Habitat construction method for benthos in plain rivers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] Step 1, preliminarily select the plain river section near the first riparian zone with a water flow velocity less than 0.4m / s as the benthos habitat construction section, and the length of the benthos habitat construction section is 230m;

[0108] Step 2: Building a plurality of porous rockfill weirs and dams along the extension direction of the first river bank at the upstream of the benthos habitat construction section, wherein any one of the porous rockfill weirs starts from the first river bank The length of the belt extending to Hanoi is 2.0m, and the distance between two adjacent porous rockfill dams is 10m; a total of 8 porous rockfill dams are set; The waters of the first riparian zone are transplanted with cattails and / or calamus in a plurality of patches to form an aquatic plant community, wherein the extended length of the aquatic plant community on part of the first riparian zone is at least 40m, and transplanted The length of each formed patch along the ext...

Embodiment 2

[0119] Step 1, preliminarily select the river section of the plain river where the water flow velocity near the first riparian zone is less than 0.4m / s as the river section for the construction of the benthic habitat, and the length of the section for the construction of the benthic habitat is 200m;

[0120] Step 2: Building a plurality of porous rockfill weirs and dams along the extension direction of the first river bank at the upstream of the benthos habitat construction section, wherein any one of the porous rockfill weirs starts from the first river bank The length of the zone extending towards Hanoi is 2.5m, and the distance between two adjacent porous rockfill dams is 12m; a total of 6 porous rockfill dams are set;

[0121] Cattails and / or calamus are transplanted in multiple patches in the water area near the first riparian zone between two or two porous rockfill dams to form aquatic plant communities, wherein the aquatic plant communities are partly described in the fi...

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Abstract

The invention discloses a plain river benthic animal habitat construction method. The plain river benthic animal habitat construction method comprises the following steps of preliminarily selecting abenthic animal habitat construction river segment; constructing a plurality of porous rock mound barrages in the extending direction of a first river riparian zone at the upstream of the benthic animal habitat construction river segment, transplanting cattails and / or calami in multiple spots in the water area, close to the first river riparian zone, between every two adjacent porous rock mound barrages to construct an aquatic plant community; arranging a plurality of sedge square blocks on the water surface of the slow running water area behind the multiple porous rock mound barrages at intervals and spreading multiple cobble spot blocks on a riverbed; spreading a plurality of height adjustable river benthic animal avoiding devices at the downstream river surface of the benthic animal habitat construction river segment at intervals; charging aboriginal benthic mollusks at the benthic animal habitat construction river segment. Through the plain river benthic animal habitat constructionmethod, the habitat quality of benthic animals in a river can be quickly and effectively improved, and then the diversity of the benthic animal community at the benthic animal habitat construction river segment is improved.

Description

technical field [0001] The invention relates to the technical field of river ecology research, in particular to a method for constructing habitats for benthic animals. Background technique [0002] In recent years, with the development of society and economy and the continuous growth of population, the development of water resources and aquatic biological resources has been unprecedentedly high, and the pressure on the ecological environment of rivers is increasing. Sewage discharge, water conservancy projects, sand mining, water diversion irrigation Human activities have destroyed the habitat of aquatic organisms. Coupled with human overfishing, climate anomalies and other reasons, it eventually led to a decline in the habitat quality of benthic animals in plain rivers and a significant decrease in biodiversity. Contents of the invention [0003] It is an object of the present invention to solve at least the above-mentioned problems and to provide at least the advantages...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/00A01K61/00
CPCY02A40/81
Inventor 王瑜刘录三朱延忠刘云龙林岿璇李黎周娟
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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