非点源污染物 meaning in English
non-point pollutant
nonpoint source pollutant
Examples
- The reasonable utilization of ditch wetlands for their capacity of retention , transformation and absorbtion of nutrients can be an effective tool in reducing
科学合理地利用沟渠湿地的截留、转化、吸收等能力，可有效降解非点源污染物，并取得很好的经济效益。 - Non - point pollutants from agricultural sources are major cause of surfacewater eutrophication , which can be traped and removed by adsorption , sedimentation , assimilation , and microbe decomposition of wetlands
农业非点源污染物是引起地表水富营养化的主要因素，湿地能通过吸附、沉积、植物吸收、微生物转化等作用有效截留和去除非点源污染物。 - Tp ( total phosphorus ) has accumulated in the whole layers of sediments from surface to 100cm . 2 . the variation of non - point source pollutants after input to wetalnds with rain runoff and fields drainage the concentrations of cod , tn and nh / - n are decreased after input to wetalnds with rain runoff and fields drainage
降雨径流和农田排水中非点源污染物进入沟渠湿地后的变化特征降雨径流和农田排水中的cod 、 tn 、 nh _ 4 ~ + - n进入湿地后，浓度均显著降低，证明湿地对非点源污染物有很好的截留和净化效果。 - As the agricultural nfs is the most important factor for water environmental deterioration and lake eutrophication in china , more and more scientists and technologists focus on the control countermeasurc and pollution mechanism of agricultural non - point source ( nfs ) . based on the investigation of natural resource and agricultural distribution , the loss rule of nitrogen and phosphorus in the typical land of qiandao lake watershed and distribution rule of the phytoplankton and physico - chemical characteristic in the lake were studied , and the input loading of nitrogen and phosphorus was also calculated by the annagnps model in this thesis . according to the routine monitoring data of the water environment in qiandao lake from 1989 to 2001 , the concentrations of toxic substance and heavy metal were under the monitoring limit , but the total nitrogen ( tn ) and total phosphorus ( tp ) were much higher than the criterion for lake and reservoir
本文调查了千岛湖流域的自然资源和农业生产情况，研究了典型坡地降雨径流中的氮、磷污染物的输出规律，利用annagnps模型估算流域农业非点源污染物输入负荷，并在千岛湖内设点采样，对水质理化指标和浮游植物群落进行系统的研究，得出以下结论： 1989 2001年间的水环境常规监测资料统计分析表明，有毒物质和重金属浓度长期在监测下限内， no _ 2 - n 、 no _ 3 - n 、 nh _ 3 - n年平均浓度均符合类标准，但湖泊水库特定项目tn和tp浓度分别为超类和类，呈严重超标状况，湖区主要污染因子是将导致富营养化的物质tn和tp 。