Study On Situation Of Water Environment And Protection Countermeasure In Niyang River Valley

The water environment is one of the basic elements constitute environment. Good water environment for economic and social development and ecological conditions have improved a crucial. The development of society and the rapid population growth, and people to the transition of development and utilization of water environment, sparked many environmental problems, adding to the water environmental deterioration trend, and this seriously influences the sustainable economic and social development, the water environment problems attracting increasing attention at all levels of government. Through the loss, resources and the environment for economic growth, the price is too big, it is our country at present influence the primary problems of economic and social development.This article introduces the nyingchi prefecture, throughout the whole of the basin, the natural conditions of yanghe geographical position, topography and hydrologic meteorological etc. Negroponte yanghe basin of agricultural non-point source pollution, facing raising livestock pollution and sewage pollution problems, pollution situation analysis, got seven towns along the river, the pollution of yanghe basin present situation, namely agriculture of chemical fertilizers, pesticides, breeding development increased livestock production quantity and sewage rises, emissions, pollution load contribution amount. Negroponte yanghe river downstream and seven villages and towns, the 15 section of yanghe export water quality status during dry monitoring, richly, yanghe rivers got 14 water quality indexes in the water and the mutagenicity changes along the riser. By using a single factor pollution index method, principal component analysis and evaluation method and the fuzzy comprehensive evaluation method, the three methods of nehemiah yanghe rivers water comprehensive evaluation. Three methods of nehemiah yanghe river water quality comprehensive evaluation results in evaluation period, for: three kinds of methods to analyze water richful during most of the basins income from the polluted water monitoring section belong to, and are to be targeted in nitrogen pollution index and P indicator; In the evaluation period, the mutagenicity three methods to analyze the income from the basins ofâ…¢decreasing section belong to, when pollution above water targeted in nitrogen index, COD index and P index, other section belong toâ…¢class the following water, right now pollution aim at nitrogen index. Anyhow, in evaluation period three methods analyzing income the basins most monitoring section of the nitrogen pollution index higher than standard ofâ…¢water, analyse the reason is due to high mountain mineral content, water and landslides caused by scouring serious.Using one-dimensional model to calculate the river, the water environmental capacity of yanghe. From the calculation results show that:â… class with water quality control standards, as a goal, to the CODCr nehemiah yanghe river pollutant carrying capacity and considerable water environmental capacity, especially the mutagenicity space more big (810350.36 kg/d), and less water 31788.30 kg/some (d), abundant withered differ 25.5 times; Toâ…¢class water as a control goal, of ammonia nitrogen, the water richful during yanghe pollutant carrying capacity has been overweight 627.29 kg/d, including the first section of the water environmental capacity exceeds bid badly 2066.77 kg/d, this data anomalies should and upstream bang jie pond grassland over-grazing lead to increased domestic animals &fowls about; The mutagenicity still can pollutant carrying capacity of 35177.35 kg/d.Engineering measures to prevent and control pollution, the establishment of rural water management new mode, emphasizing scientific research and talent support, such as with the al water environmental protection of yanghe basin, and work hard to well-off countermeasures, and peace, Tibet, Tibet, Tibet for Tibet harmonious social and economic sustainable, healthy and harmonious development to create the good conditions. Nebuchadnezzar yanghe basin will eventually water environmental protection and Lin zhi of regional economic development and lay the good foundation.