Sound Chestwood Factor Analysis Of Water Environment And Water Quality Comprehensive Evaluation

Due to the rapid development of industrialization and the population continues to increase, resulting in increasing water pollution, water environment problems have seriously affected the sustainable development of our country’s economy and society. To protect reasonable development and utilization of water resources, must be carried out on the water environment planning and management scientifically, and the water quality evaluation is an important means of supervision and management of water environment.In 2014, the factor of water environment in yinchuan wong chestwood investigation, on the basis of using the principal component analysis method to analyze the main environmental factors affecting the water quality sound chestwood, using the single factor evaluation method and fuzzy comprehensive evaluation method and gray correlation method is used to evaluate the water quality situation for sound chestwood, get the following conclusion:1. The principal component analysis results according to the characteristic values of water environment will be chestwood factor is divided into two classes, the first and second principal components already contains nine indicators all the information, and the cumulative contribution rate has reached 86.72%, the two principal component 1 contribution rate of 54.08%, water plays a leading role, containing water quality factor for biochemical oxygen demand, chemical oxygen demand (cod), transparency,5 can be thought of as water pollution caused by organic matter; Principal component contribution rate of 32.64%,2 contains the factor of chlorophyll, total phosphorus, potassium permanganate index and chemical oxygen demand (cod), can be thought of as the algae caused by water pollution.2. Determine the main factors affecting water environment sound chestwood followed by fluoride,5th biochemical oxygen demand, permanganate index, transparency, total phosphorus, chemical oxygen demand (cod), chlorophyll, comprehensive analysis of nitrogen and phosphorus nutrient plays a leading role in the water sound chestwood, changes in concentrations of nitrogen and phosphorus is the main cause of water quality change song chestwood.3. The single factor evaluation of chestwood water quality. In 2014 four water quality monitoring stations are singing chestwood IV class, SO1 and SO4 main pollutant TN, SO2 and SO3, main pollutants are COD, comprehensive evaluation for the whole year for IV class, main pollutants of TN and COD.4. By DPS, by using the grey correlation method and fuzzy evaluation method to chestwood water quality evaluation, while the grey correlation method and fuzzy evaluation method have some differences, but the comprehensive evaluation results are Ⅲ water quality, so the sound chestwood comprehensive for grade Ⅲ water quality5. Sound chestwood comprehensive nutrition state index of high in the summer, is 59.59, has reached the light eutrophication level, the winter is low, other time is between 50 to 60, reached the light eutrophication level, overall, cui hu is in a mild eutrophic level.