Analysis Of Characteristics Of Water Quality Change Of ChaiWen River In Xintai Section

In recent years, with the rapid development of urbanization, industry and agriculture, population growth, water consumption increased year by year. Surface water is scarce and an important part of the human use of freshwater resources available. It is also human survival, production and development necessary supplies, available surface water pollution is growing exacerbated, result a direct threat to life and human health, environmental control is imminent. Water resource protection is everyone’s responsibility.The changes of water quality in various countries are also studied. The reasons for the changes and the countermeasures are put forward.Xintai Chaiwen river flows through 10 villages and towns of the city of Xintai, it’s downstream flows into the Dawen River and finally joins the South North diversion storage Dongpinghu Reservoir, so the water quality evaluation is of great significance.This paper study on the river water pollution by the water quality monitoring data of Xintai Chaiwen river from 2012 to 2014,and analyzed the main pollution indexes and the changing trend. Using single factor pollution index and comprehensive pollution index evaluated the river pollution situation and water change tendency, and pertinently put forward the countermeasures. Specific conclusions are as follows:By single factor pollution index, the water quality pollution of Chaiwen river was evaluated from all kinds of contaminated material degree, the major pollutants are ammonia nitrogen and chemical oxygen demand. The pollution degree of the river by the total phosphorus, permanganate index, anionic surfactants, fluoride, fecal coliform and volatile phenol were less.The evaluation index was significantly different with the seasonal changes. the water quality was polluted seriously in winter than in other seasons, low water period>normal water period>Wet period, especially ammonia nitrogen and chemical oxygen demand. Concentration values of ammonia nitrogen and total phosphorus have increasing trend in three years, CODcr, permanganate index, anionic surfactants, fluoride, fecal coliform and volatile phenol, have decreasing trend.From the spatial distribution, the various pollutants with significant changes along the river, midstream>downstream>upstream. Less pollution sources exist on upstream and because there are large numbers of factories and villages along the banks of the middle reaches of the river,anthropogenic pollution is serious; pollution source less on the downstream and artificial wetland affect, the water quality is improved.Using the share rate of pollutants and exceeding standard rate, the major pollutants were ammonia nitrogen and chemical oxygen demand,total phosphorus and permanganate index of water pollution is relatively general,the other pollutants have basically non-existent effects on water quality pollution.So, in the middle reaches of a river of Pingyang into Wen, Zhou River into the Timor and Zhai Liang bridge, pollution is the most serious, pollution of bridge Guli and Nansong is relatively light, Shapo bridge water quality was best.On the basis of the scale of section water quality evaluation of Chai River basin, water quality is inferior to the V class.From 2012 to 2014, the level of water quality has not changed, the water quality has not changed significantly.The major pollution indicators including chemical oxygen demand, ammonia nitrogen, total phosphorus and permanganate index.Based on the comprehensive pollution index method, the water quality index of the evaluation of the water quality indicators basically reached the corresponding functional standard, the water body function can be fully played.According to Chai Wen River water quality monitoring data we can get the pollution situationof the river water, pollution variety, pollution degree of various pollutants to the water quality of the river and the reason of the change of water quality in the river is analyzed.