A method for judging the overwintering period of lake cyanobacteria and the control window period of cyanobacteria
A window period and lake technology, applied in the fields of environmental science and ecology, can solve the problems of unsatisfactory effect, inaccurate implementation time, no lake cyanobacteria overwintering period and effective window period determination method.
Active Publication Date: 2021-03-09
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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However, this invention does not involve a method for judging the overwintering period of lake cyanobacteria and the effective window period, so that the measures for removing and controlling overwintering cyanobacteria may not be effective due to inaccurate implementation time
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[0022] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are not intended to limit the present invention.
[0023] The concrete realization steps of the judging method of lake cyanobacteria overwintering period of the present invention are as follows:
[0024] (1) Collect mixed water samples, overlying water and sediment samples from the upper, middle and lower layers of the water column at the sampling points of Taihu Lake;
[0025] From the end of autumn to the beginning of spring, according to the meteorological conditions, it is generally selected between November and March each year. According to the size of the lake area and the shape of the lake, a number of sampling points that can reflect the conditions of the whole lake are arranged in the whole lake. 5-50km 2 3-10 sampling points are arranged in the whole lake; the lake area is 50-500 km ...
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The invention provides a method for judging the overwintering period of lake cyanobacteria and the control window period of cyanobacteria, based on the growth and distribution of cyanobacteria in water bodies and sediments, and the phenomenon that cyanobacteria will overwinter in sediments in winter, from late autumn to spring At the beginning, the concentration / content of phycocyanin and chlorophyll a in the water column, overlying water and sediment was determined by sampling the whole lake; the concentration / content ratio of phycocyanin and chlorophyll a in the water column, overlying water and sediment was determined Overwintering period; minus 10 days before and after the overwintering period is determined as the window period for taking control measures. The method of the present invention accurately identifies the overwintering period of lake cyanobacteria in sediments based on key biological, physiological and biochemical indicators in water bodies and sediments, and proposes a window period for effectively reducing and controlling overwintering cyanobacteria, providing technology for lake cyanobacteria bloom control support.
Description
technical field [0001] The invention belongs to the technical category of water environment treatment and cyanobacteria bloom control in the fields of environmental science and ecology, and specifically relates to eutrophication treatment and ecological restoration technologies of large shallow lakes and reservoirs. Background technique [0002] In recent years, the problem of eutrophication in my country's lakes has become increasingly serious, and cyanobacteria blooms continue to break out, deteriorating water quality and ecological environment, and threatening water supply security. At present, the control methods of cyanobacteria blooms in lakes include mechanical algae removal, modified clay algae removal, fish algae control, plant algae suppression, microbial algae control, preparation algae removal, ultrasonic algae removal, electrochemical algae removal, shading suppression, etc. The most important thing is the emergency salvage measures, including manual salvage, th...
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IPC IPC(8): G01N33/00
CPCG01N33/0098
Inventor 史小丽于洋张民阳振陈开宁
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY