文档介绍：北京工业大学工学硕士学位论文
贡献量在点源污染中占据着主导地位,是最重要的点源。周边地区水土流失是最主要的面源污染,%,%a 地形和植被覆盖度是最重要的两个面源污染影响因素。通过水土流失由农田流失的化肥中,氮、。,是除水土流失外的第二大营养物来源。在监测的清水河、对家河和白马关河中:清水河整个汛期无来水;对家河和白马关河水体中的氮营养元素含量相对较高,但是水质总体上良好,仍然处在地表水II类水体以上,。
总的来说,研究范围内营养元素的输入对水库水质有较大影响,以蓄水量 109m3计算,不计水库营养元素的输出,课题所研究区域内每年输入水库的氮、磷元素可引起水库中氮、/L。
关键词水库;营养元素;点源污染;面源污染
摘要
Abstract
In China,water resource distribution is unbalanced,and the shortage of water in many north cities is the development of society,the demand of the water has been surface water is one of the important parts of water resources,but it faces a challenge of significant eutrophication problems because of the excessive input of nutrient obtain the information of the input quantity ofthe pollutant is the foundation to make the control strategy.
The MiYun Reservoir is the important surface water SOurCe of Beijing It is
necessary to master the source and the gross of nutrition that enters the reservoir. There are three sources of nutrition input into the reservoir:precipitation,river and periphery pollution from periphery district Can be divided into point
source and non point source.
The gross nutrition from the precipitation Was obtained by monitoring the quality and the quantity of the precipitation of periphery water quality and volume of the major river such as Qingshui River,Duijia River and White
Maguan River had been measured and their nutrient contribution to the reservoir had
been calculated point SOUrCe pollution,the nutrition was contributed by variOUS sources:animal wastes,human feces,inn and restaurant in tour sight spot. For nonpoint source pollution,the consumption of fertilizer and pesticide Was the data information of periphery district,which included Digital Elevation Model,Landsat7 TM remo