Method for controlling endogenous pollution of lakes and water reservoirs

Abstract

The invention discloses a method for controlling endogenous pollution of lakes and water reservoirs, and relates to the technical field of government of the lakes and the water reservoirs. The methodcomprises the following steps: 1, surveying to know water quality data of a whole water body, and setting representative sampling points according to a data analysis result; 2, putting deepwater isothermal-layer oxygenation equipment at appropriate sites of a deepwater area; 3, putting up-down water body exchange equipment in appropriate sites of a shallow water area; 4, setting mobile detection points; 5, collecting water-quality data again; and 6, moving a horizontal position of the equipment or increasing the depth of a water outlet of the equipment after the water-quality data in an equipment coverage area is improved so as to further improve the water quality of the water body. According to the method disclosed by the invention, a way of not stirring bottom mud as much as possible isadopted, and dissolved oxygen of overlying water of the water body is increased; by increasing the dissolved oxygen, ammonia nitrogen in the water is reduced so as to reduce a Ph value of the overlying water, and the adsorption ability of the bottom mud is enhanced, and thus, heavy metals such as phosphorus, arsenic and manganese in the water body can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of lake and reservoir treatment, and in particular relates to a method for controlling internal source pollution of lakes and reservoirs. Background technique [0002] 1. Current status of lakes and reservoirs: [0003] 1.1. Lake water quality: In 2013, the water quality of 119 major lakes with a relatively high degree of development and utilization and a large area in the country with a total area of ​​29,000 km2 was evaluated. Most of the lakes are in a eutrophic state. There is 1 oligotrophic lake, accounting for 0.8% of the total number of evaluated lakes; 35 medium-nutrient lakes, accounting for 29.4% of the total number of evaluated lakes; 83 eutrophic lakes, accounting for 69.8% of the total number of evaluated lakes. [0004] 1.2. Reservoir water quality: In 2013, the water quality of 262 large reservoirs, 381 medium-sized reservoirs and 24 small-scale reservoirs nationwide, a total of 667 major re...

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Problems solved by technology

[0016] In view of the limiting factors of the above existing methods, in order to solve the problems of eutrophication and heavy metal content in existing lakes and reservoirs at low cost, which pose a major threat to water quality; the purpose of the present invention is to provide a method for controlling the internal source pollution of lakes and reservoirs Methods

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