年平均浓度 meaning in English
annnual average concentration
annual average concention
mean annual concentration
Examples
- Beyond blue sky reporting , the 2006 change in the air quality monitoring network also has resulted in misleading improvements in reported annual pollutant concentrations
除此之外， 2006年改变空气质量监测网的做法也会误导污染物年平均浓度出现改善的结论。 - 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 。