A technical method of lake and reservoir water ecological health assessment

A water ecology and reservoir technology, applied in the direction of testing water, material inspection products, etc., can solve problems such as the difficulty of restoration, and achieve the effect of low professional knowledge requirements and low acquisition difficulty.

Active Publication Date: 2022-08-02
JIANGSU ENVIRONMENTAL MONITORING CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to their inherent characteristics, lakes and reservoirs are obviously affected by human activities, and it is difficult to restore them.

Method used

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  • A technical method of lake and reservoir water ecological health assessment
  • A technical method of lake and reservoir water ecological health assessment
  • A technical method of lake and reservoir water ecological health assessment

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0068] This example is a water ecological health assessment for single monitoring in winter and spring, summer and autumn of some lakes and reservoirs in the Taihu Lake Basin considering the comprehensive nutrient state index, macrobenthic invertebrate index and planktonic algae index. The specific process is as follows:

[0069] (1) Index calculation and normalization

[0070] Once in winter, spring, summer and autumn, samples were collected from some measuring points in the Taihu Lake Basin for analysis and determination of chlorophyll a, transparency, permanganate index, total phosphorus, and total nitrogen. Five eutrophication evaluation indicators, the number of mollusk taxa, the number of macrobenthic The dominance of the first dominant species of invertebrates, the BMWP index of macrobenthic invertebrates, three indicators for evaluating the diversity of macrobenthic invertebrates, the total number of planktonic algae taxa, the density of planktonic algae cells, and the...

Embodiment 2

[0098] Based on the calculation result of Embodiment 1, this embodiment further describes the calculation of the water ecological health index of the measuring point in the case of multiple monitoring. The specific process is as follows:

[0099] Table 1 and Table 2 in the above-mentioned embodiment 1 respectively provide the water ecological health index of some lakes and reservoirs in the Taihu Lake Basin in winter and spring and summer and autumn. The obtained water ecological health index. Taking these two monitoring results to represent the annual change of the water ecological health index of each measuring point, the annual average of the water ecological health index of each measuring point is the arithmetic average of its winter and spring water ecological health index and the summer and autumn water ecological health index. Taking the Changdang Hubei survey point as an example, the arithmetic mean of the water ecological health index in winter and spring of 0.429 an...

Embodiment 3

[0103] Based on the calculation results of Example 1 and Example 2, this embodiment further describes the calculation of the regional water ecological health index, and further describes the calculation of the regional water ecological health index under the condition of multiple monitoring. The specific process is as follows:

[0104] The 20 measuring points in Example 1 above belong to 9 areas. Taking the Changdang Lake area as an example, the area includes three measuring points: Changdang Hubei, Ganhekou of Changdang Hubei and Changdang Hunan. Taking the arithmetic mean of Changdang Hubei water ecological health index 0.429, Changdang Hubei Ganhekou water ecological health index 0.658 and Changdang Hunan water ecological health index 0.654, the water ecological health index of Changdang Lake area in winter and spring is 0.580 , in the same way, the water ecological health index of Changdang Lake area in summer and autumn is 0.552. Further, taking the arithmetic mean of t...

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Abstract

The invention provides a technical method for water ecological health assessment of lakes and reservoirs, belonging to the technical field of ecological environment protection. The method firstly measures the eutrophication, macrobenthic invertebrates and planktonic algae indexes of lakes and reservoirs, and then calculates the comprehensive trophic state index, macrobenthic invertebrate index and planktonic algae index by the method proposed in the invention, and carries out Normalize and calculate the water ecological health index, and finally, evaluate the water ecological health status of lakes and reservoirs according to the classification standard of the water ecological health index divided by the present invention. The number of indicators adopted by the invention is small, the amount of information contained in the indicators is large, the adopted indicators, especially the biological indicators, are less difficult to obtain and require less professional knowledge, and are convenient for large-scale implementation and application. By applying the water ecological health assessment technical method established by the present invention, the comprehensive assessment of the water ecological health of lakes and reservoirs can be realized from the perspective of water quality and biology.

Description

technical field [0001] The invention belongs to the technical field of ecological environment protection, and in particular relates to a technical method for health assessment of lake and reservoir water ecosystems. Background technique [0002] Water ecological restoration is a higher-level water ecological protection measure that needs to be taken after the water environment quality has been improved to a certain extent. Water ecological health assessment is a precondition for the formulation of water ecological restoration strategies, and it is also a necessary means to consider the effectiveness of water ecological restoration. [0003] Water and the aquatic organisms living in it are important components of the aquatic ecosystem, and there is an obvious two-way interaction between the two. The current water ecological evaluation is mostly based on water quality or a certain type of biological indicators, such as macrobenthic invertebrates, planktonic algae, zooplankton...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/18
CPCG01N33/18
Inventor 吕学研陈桥蔡琨张翔李继影张咏徐东炯徐恒省牛志春
Owner JIANGSU ENVIRONMENTAL MONITORING CENT
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