Method for determining key control variant of black and odorous water body and target value of key control variant

A technology for black and odorous water and control variables, applied in the direction of chemical process analysis/design, etc., can solve the problems of difficult concentration of ferrous sulfide, lack of methods for managing target values ​​of key control variables, etc., and achieve the effect of easy popularization and use.

Active Publication Date: 2019-02-15
YANGZHOU UNIV
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  • Application Information

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Problems solved by technology

After research, the phenomenon of black and odorous water bodies is mostly caused by the existence of ferrous sulfide in water bodies; however, the concentration of ferrous sulfide is difficult to control directly, and its concentration can only be controlled indirectly by controlling other environmental v

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  • Method for determining key control variant of black and odorous water body and target value of key control variant
  • Method for determining key control variant of black and odorous water body and target value of key control variant
  • Method for determining key control variant of black and odorous water body and target value of key control variant

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Embodiment Construction

[0053] The content of the present invention will be further explained below in conjunction with the attached drawings and the measured data of a black and smelly river in eastern my country:

[0054] (1) Follow figure 1 Flow chart steps shown:

[0055] a. Obtained from the literature and actual monitoring of the black and smelly river channel ferrous ion concentration Fe, total phosphorus concentration P, total nitrogen concentration N, dissolved oxygen concentration D and chlorophyll a concentration C of 69 groups of observation data.

[0056] b. Arrange the ferrous ion concentration Fe from small to large to obtain the cumulative distribution function F(Fe) of the ferrous ion observation data; the cumulative distribution function is calculated by the following formula:

[0057]

[0058] c. Use the obtained F(Fe) and nuclear density estimation method to obtain figure 2 The kernel density function shown, the kernel density estimation is done with a Gaussian kernel.

[0059] (2) Arrang...

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Abstract

The invention discloses a method for determining a key control variant a black and odorous water body and a target value of the key control variant, the method comprises the following steps: (1) collecting or monitoring observation data of n groups of the ferrous ion concentration Fe, the total phosphorus concentration P, the total nitrogen concentration N, the dissolved oxygen concentration D andthe concentration C of chlorophyll a of the to-be-treated black and odorous water body; acquiring a corresponding density function of the ferrous ion concentration; (2) acquiring new data of the total phosphorus concentration P'; (3) acquiring one regression tree not pruned; (4) acquiring k regression trees not pruned; (5) acquiring a pseudo-density function of the ferrous ion concentration; (6)calculating the Jensen-Shannon divergence between the F(Fe) and n G(Fe), taking the maximum value as the measurement of the importance of the total phosphorus; (7) acquiring the importance of the total nitrogen, the dissolved oxygen and the chlorophyll a; (8) acquiring the key control variant of the black and odorous water body; and (9) acquiring a management target value of the key control variant in the black and odorous water body. The environment variant mostly important for the treatment of the black and odorous water body and the management target value of the variant are determined, andthe method is easy to popularize in the treatment of the black and odorous water body.

Description

Technical field [0001] The invention relates to a method for determining key control variables of black and odorous water bodies and their target values, and belongs to the field of water quality management. Background technique [0002] With the rapid development of my country's economy and society, black and odorous phenomena frequently occur in many urban water bodies in my country. According to research, the black and odor of water is mostly caused by the presence of ferrous sulfide in the water; however, the concentration of ferrous sulfide is difficult to directly control, and its concentration can only be controlled indirectly by controlling other environmental variables. In the current research, there is no method to determine the key control variable of the concentration of ferrous sulfide in natural water, and there is no method to establish the management target value of the key control variable in the black and smelly water. Summary of the invention [0003] The purpo...

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Application Information

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IPC IPC(8): G16C20/10
Inventor 汪靓程吉林王玉琳程浩淼
Owner YANGZHOU UNIV
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