Investigation And Analysis Of Non-point Source Pollutants In Shanmei Reservoir Area

Shanmei Reservoir and import and export section of the water quality monitoring project such as total nitrogen, total phosphorus and other serious pollution, has more than Class V water quality standards, this study for pollutants in the Shanmei Reservoir area situation analysis, storage in river section of the water quality and pollution sources into the river volume analysis, to explore the major source of pollutants in the basin, obtained a list of priority control is the main source of pollution, Shanmei reservoir ecological environment protection provides the basis.Shanmei reservoir contamination investigation and analysis of the results showed that:(1)in the investigation and analysis of industrial pollution sources, ammonia nitrogen emissions rise, wastewater emissions and COD emissions with changes in emissions year downward trend;investigation and analysis of the livestock and poultry breeding, changes of COD, ammonia nitrogen and total phosphorus emissions trend, along with changes in emissions year increased slightly; in the investigation and analysis of urban sewage, changes of ammonia nitrogen and total phosphorus emissions of COD, consistent with the changes of the year, emissions of no change;investigation and analysis of rural domestic sewage, the change of ammonia nitrogen and total phosphorus emissions of COD, consistent with the change of the year, emissions decreased slightly; investigation and analysis of the farmland runoff, change of ammonia nitrogen and total phosphorus emissions of COD, consistent with the change of the year, emissions slightly increased in the investigation and analysis of life; garbage in rural areas, the changes of COD, ammonia nitrogen and total phosphorus emissions trend, with the change of discharge years showed a downward trend;investigation and analysis of urban runoff in 2013, urban initial rainwater runoff in the basin is 4557000 tons, emissions of COD, ammonia nitrogen, total nitrogen and total phosphorus were 1275.96 tons, 15.95 tons,164.05 tons and 7.75 tons; investigation and analysis of the endogenous reservoir sediments of Shanmei reservoir, secondary reservoir water pollution source in the condition, changes, sediment and water nitrogen balance was broken, the nitrogen in sediments may be resolved, it will have an impact on the reservoir water, with some potential risks.(2)In each pollutant emissions accounting, the emission maximum of COD for rural domestic wastewater, ammonia nitrogen emissions is the largest agricultural runoff, total nitrogen emissions from livestock and poultry breeding is the largest, the largest total emissions for livestock and poultry breeding.(3) In the analysis of the amount of the main pollutants in the river, from the Tao river. (4)Through the investigation and analysis of pollution source of COD, shows that, ammonia nitrogen, total nitrogen and total phosphorus and other major pollutants of Shanmei reservoir, priority should be given to control.