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A Method for Evaluation of Longitudinal Connectivity of Rivers

An evaluation method and connectivity technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as no reference water ecology

Active Publication Date: 2021-03-30
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the patent does not refer to water ecology, water environment, water security issues

Method used

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Embodiment 1

[0071] The method for evaluating the longitudinal connectivity of the river comprises the following steps:

[0072] Step 1, search for river barriers in the study area and record the number, height, length, water storage capacity and geographical location of the river barriers in the study area;

[0073] Step 2: Evaluate each single river barrier separately. The evaluation indicators include: the current status of fish resources in a single river barrier, the fish passing rate of a single river barrier, the difficulty of passing a single river barrier, the number of habitats for a single river barrier, and Habitat quality of single stream barriers, and documented; where:

[0074] 1) The diversity scoring method for the status quo of fish resources in a single river barrier is:

[0075] The formula for calculating the diversity index of a family is: In the formula, p i =W ki / W k , W ki equal to the number of species in genus i of family K, W k is equal to the number of...

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Abstract

The invention relates to a river longitudinal connectivity evaluation method, which belongs to the technical field of environmental evaluation, and comprises the following steps of step 1, searching river barriers in a research area, and recording the number, height, length, water storage capacity and geographic position of the river barriers in the research area; 2, evaluating each river barrierindependently, wherein the evaluation indexes comprise the current situation of fish resources, the fish passing rate, the passing difficulty, the number of habitats and the quality of the habitats and are recorded; 3, on the basis of the evaluation results of the river obstructions obtained in the step 2, giving weights according to the positions of the river obstructions away from the estuary, and carrying out weighted average on the evaluation results to obtain the river longitudinal connectivity in the research area. According to the method, the calculation and the correction of the longitudinal connectivity of the river are completed by increasing the diversity index and the fish passing rate of the current situation of fish resources and taking the difficulty, the number of habitatsand the quality of the habitats as references.

Description

technical field [0001] The invention belongs to the technical field of environmental evaluation, in particular to a method for evaluating the longitudinal connectivity of rivers. Background technique [0002] With economic development, climate change and human activities have had a major impact on the connectivity patterns of rivers, especially man-made structures such as weirs, gates, and weirs may hinder or prevent fish from reaching necessary habitats, potentially affecting fish distribution, population structure, reproductive success and dispersal of many species. A series of water ecology, water environment, and water security problems caused by blocked connectivity seriously restrict the sustainable development of regional economy and society. Therefore, connectivity evaluation is of great significance for the construction of structures such as gates and dams and the construction location of such buildings. However, the existing connectivity evaluations generally eva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/02
Inventor 李春晖李智卜久贺王烜蔡宴朋刘强
Owner BEIJING NORMAL UNIVERSITY
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