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Lake and reservoir water ecological health evaluation technical method

A water ecology and reservoir technology, applied in the direction of testing water, material inspection products, etc., can solve problems such as difficult recovery

Active Publication Date: 2017-12-08
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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  • Lake and reservoir water ecological health evaluation technical method
  • Lake and reservoir water ecological health evaluation technical method
  • Lake and reservoir water ecological health evaluation technical method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This example is a water ecological health assessment of single monitoring in winter, spring, summer and autumn of some lakes and reservoir measuring points in the Taihu Lake Basin considering the comprehensive nutritional status 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 from some measuring points in the Taihu Lake Basin were collected for analysis and determination of 5 eutrophication evaluation indicators: chlorophyll a, transparency, permanganate index, total phosphorus, and total nitrogen, the number of taxa of molluscs, and the number of macrobenthos The dominance degree of the first dominant species of invertebrates, the BMWP index of macrobenthic invertebrates, the three macrobenthic invertebrate diversity evaluation indicators, the number of total taxa of planktonic algae, the cell density of pla...

Embodiment 2

[0098] Based on the calculation results of Example 1, this embodiment further illustrates the calculation of the water ecological health index of the measuring point under the condition 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 reservoir measuring points in the Taihu Lake Basin in winter, spring and summer and autumn, that is, in the case of monitoring twice, each measuring point is calculated based on each monitoring result The obtained water ecological health index. Using these two monitoring results to represent the annual changes 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 mean of the water ecological health index in winter and spring and the water ecological health index in summer and autumn. Taking Chan...

Embodiment 3

[0103] Based on the calculation results of Examples 1 and 2, this embodiment further illustrates the calculation of the regional water ecological health index, and further illustrates 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 the above-mentioned embodiment 1 belong to 9 areas. Taking the Changdang Lake area as an example, the area includes three measuring points in Changdang Hubei, Changdang Hubei Ganhe Estuary and Changdang Hunan. Taking the arithmetic mean of Changdang Hubei Water Ecological Health Index 0.429, Changdang Hubei Ganhe Estuary Water Ecological Health Index 0.658 and Changdang Hunan Water Ecological Health Index 0.654 in winter and spring, the water ecological health index of Changdang Lake area in winter and spring is 0.580 , similarly, the water ecological health index of Changdang Lake area in summer and autumn is 0.552. Fu...

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Abstract

The invention provides a lake and reservoir water ecological health evaluation technical method, and belongs to the technical field of ecological environment protection. According to the method, firstly, eutrophication, macroinvertebrate and floating algae indexes of a lake and a reservoir are measured; then by the method disclosed by the invention, a comprehensive nutritional status index, the macroinvertebrate index and the floating algae index are calculated and are subjected to normalization processing, and a water ecological health index is calculated; and finally, according to a water ecological health index grading standard divided by the method, water ecological health statuses of the lake and the reservoir are evaluated. According to the method disclosed by the invention, a small amount of indexes are adopted, the indexes include a great information quantity, the adopted indexes, particularly the biological indexes are low in acquisition difficulty and low in requirement for professional knowledge, and the method is convenient to implement and apply in a large range. By applying the water ecological health evaluation technical method established by the invention, comprehensive evaluation on lake and reservoir water ecological health can be implemented from the points 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 evaluating the health of lake and reservoir water ecosystems. Background technique [0002] Water ecological restoration is a higher level of water ecological protection measures that need to be taken after the water environment quality has been improved to a certain extent. Water ecological health assessment is a prerequisite 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, zoop...

Claims

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Application Information

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Patent Type & Authority Applications(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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