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Method for calculating assimilative capacity of water functional area in freeze-up period

A technology of water functional area and pollution-holding capacity, which is applied in calculation, special data processing applications, instruments, etc., and can solve problems such as not considering the dry season of cold water basins and affecting the pollution-holding capacity of water functional areas in cold areas

Inactive Publication Date: 2015-05-13
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0009] The current calculation method for the pollution-holding capacity of water function zones in cold regions uses the dry season flow rate as the basis for the approved design flow rate, but it does not take into account that the dry season in the cold region basin is also the ice-covered period, and the ice-covered and low water temperature of the river during the ice-covered period will affect the water body. It has a greater impact on the self-purification ability of the river basin, thus affecting the pollution-holding capacity of the water function area in the cold area

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  • Method for calculating assimilative capacity of water functional area in freeze-up period

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Embodiment Construction

[0037] Below in conjunction with specific embodiment, further illustrate the present invention.

[0038] Due to the reduction of water volume and narrowing of the river channel during the ice-covered dry season of the Songhua River Basin, the flow and velocity of the river channel are small, so the pollution-holding capacity of the water function zone is calculated using a one-dimensional water quality model.

[0039] When no external sewage is discharged, the pollutant concentration at the lower section of the river section is calculated according to formula (5-1):

[0040] C x = C 0 exp ( - K L u ) - - - ( 5 - 1 )

[0041] In the formula: C x —concentration of pollutants at ...

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Abstract

The invention provides a method for calculating the assimilative capacity of a water functional area in a freeze-up period, and aims at providing a method for calculating the assimilative capacity of the water functional area suitable for the cold region river freeze-up period. The method is characterized by including the steps of establishing a one-dimensional water quality model of the assimilative capacity of the water functional area and the like. The method has significance in analyzing and regulating the water environment risk of the cold region freeze-up period.

Description

technical field [0001] The patent of the present invention relates to a method for calculating the pollution-holding capacity of water functional areas during the ice-covered period. Background technique [0002] According to the "National Water Function Zoning of Important Rivers and Lakes (2011-2030)", the water function area is divided into two levels. The first-level zoning adjusts the relationship between water resources development, utilization and protection on a macro level, coordinates the relationship between regions, and considers the needs of sustainable development; the first-level division of water functions is divided into four categories, namely, protected areas, reserved areas, development and utilization areas, and buffer zones. The second-level zoning mainly focuses on the development and utilization areas to refine the functional types and functional rankings of water areas, and coordinate the relationship between different water industries; the second-le...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 胡鹏周祖昊贾仰文周娜朱乾德贺华翔李海红刘盈斐王鹏
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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