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Method for calculating lake and reservoir inflow flow of rivers

A flow calculation, lake and reservoir technology, applied in the field of lake and reservoir water environment, can solve problems such as difficulty in grasping key points, lack of scientific basis for work, unfavorable to understand the reasons for changes in water quality of lakes and reservoirs and grasp the source of pollutants, etc., and achieve a high degree of compatibility. effect of increased temporal and spatial resolution

Active Publication Date: 2018-02-09
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

This is not conducive to understanding the causes of water quality changes in lakes and reservoirs and grasping the sources of pollutants
Especially in the current situation where the protection and management of the lake water environment are highly valued, the lack of water inflow from the main rivers of the lake and reservoir makes the relevant work lack scientific basis, it is difficult to grasp the key points, and the work effect needs to be improved

Method used

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  • Method for calculating lake and reservoir inflow flow of rivers
  • Method for calculating lake and reservoir inflow flow of rivers
  • Method for calculating lake and reservoir inflow flow of rivers

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Embodiment Construction

[0027] Embodiment Taking Chaohu Lake as an example, the technical solution of the flow calculation method of the present invention is further described.

[0028] Located in the central part of Anhui Province, Chaohu Lake is the fourth largest freshwater lake in the Yangtze River Basin in my country. Its drainage area is 13486km 2 , the upper drainage area of ​​Chaohu Gate is 9153km2 2 , belongs to the left bank water system of the lower reaches of the Yangtze River, and the water area of ​​Chaohu Lake is 769.6km 2 (Normal water level 8.5m Wusong elevation), the average water depth is about 2.7m, and the volume is 2.07 billion m 3 . The terrain of the basin is high in the west and low in the east, and the middle is low-lying and flat. There are many tributaries in the Chaohu Lake Basin, most of which are tree-shaped, with clear hydraulic connections. The main rivers entering the lake are: Hangbu River-Fengle River, Pai River, Nanfei River-Dianbu River, Baishi Tianhe River,...

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Abstract

The invention relates to a method for calculating lake and reservoir inflow flow of rivers. The method comprises the following steps: collecting hydrological data and meteorological data of main lakeand reservoir inflow riverways, calculating correlation coefficients of river section flow and different rainfall time lengths, selecting a rainfall time length T that is significantly correlated withthe section flow, establishing a total rainfall relational expression of representative river section flow and the selected rainfall time length T, calculating the water yield of total rainfall of aunit area within the rainfall time length, and then calculating the day-to-day lake and reservoir inflow flow of the riverways by using drainage basin catchment basin areas. The flow calculation method provided by the invention further comprises: adjusting the rainfall runoff coefficient of the unit area involved in the calculation based on the principle of water balance so as to improve the harmony of flow and water level data. As the method provided by the invention is used for calculating the lake and reservoir inflow flow of rivers, the time and space resolution of lake and reservoir inflow water yield is improved, and a foundation is laid for the calculation and estimation of the lake inflow pollution flux of the main riverways of lakes and reservoirs.

Description

technical field [0001] The invention belongs to the technical field of lake and reservoir water environment, and in particular relates to a method for calculating the flow of a lake and a river into a lake and reservoir. Background technique [0002] Flow data is an important parameter for calculating the water balance of lakes and reservoirs, flood control, water supply and environmental quality management. It is of great significance to accurately estimate and calculate the water volume of the main rivers of lakes and reservoirs. Obtaining the water volume of rivers entering lakes and reservoirs usually requires the deployment of water monitoring sections at the entrances of rivers entering lakes and reservoirs, and is obtained through observation methods. Because the water volume of the river is affected by the upstream rainfall and the water level of the lake, the flow of the river into the lake and the reservoir changes rapidly over time. Therefore, high-frequency monit...

Claims

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Application Information

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IPC IPC(8): G06F17/18G06F17/30
CPCG06F16/29G06F17/18
Inventor 胡维平彭兆亮魏巍
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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