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A Calculation Method of Pollution-Holding Capacity of Water Function Areas During Ice-covered Period

A technology of water function area and pollutant-holding capacity, which is applied in computing, special data processing applications, instruments, etc., can solve the problem of not taking into account the dry season of the cold region and affecting the pollutant-holding capacity of the water function area of ​​the cold region.

Inactive Publication Date: 2017-10-10
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

Method used

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  • A Calculation Method of Pollution-Holding Capacity of Water Function Areas During Ice-covered Period
  • A Calculation Method of Pollution-Holding Capacity of Water Function Areas During Ice-covered Period
  • A Calculation Method of Pollution-Holding Capacity of Water Function Areas During Ice-covered Period

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[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]

[0041] In the formula: C x —concentration of pollutants at the lower section, mg / L; C 0 ——Concentration of pollutants at the initial section, mg / L; L——Calculated length of the river section, m; u——Average velocity of the river section under the design flow rate, m / s; K——Comprehensive attenuation coefficient of pollutants, 1 / s.

[0042] When the distance from the lower section to the calculated riv...

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Abstract

The purpose of the present invention related to the patent of the present invention is to provide a method for calculating the pollution-holding capacity of water functional areas during the ice-covered period. The method of calculating the pollution-holding capacity of the water function zone during the freezing period of the rivers in the region is of great significance for the analysis and regulation of the water environment risk during the freezing period in the cold region.

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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Patent Type & Authority Patents(China)
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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