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source of diffuse pollution
相关语句
  扩散污染源
     Spatial distributions of metals contaminated were constructed for the whole urban area pointing to vehicle traffic as the main source of diffuse pollution (e.g. Pb, Cu, Zn, Cd) and also showing the contribution of point sources of pollution to urban surface soils.
     污染元素的空间分布特征显示了Zn、Cu、Pb、Cd等元素主要与交通运输等扩散污染源相关,而元素As、Sb的空间分布主要与工业污染源(点源)有关。
短句来源
  相似匹配句对
     The Source Disassembler
     源反汇编实用程序
短句来源
     Source Dwelling
     思源屋
短句来源
     source of funds;
     资金来源;
短句来源
     The Source of Innovation
     创新的源泉
短句来源
     mosaic and diffuse.
     PCNA标记指数与HCC的分级相关。
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  source of diffuse pollution
Forestry is the largest scale human impact affecting catchments in Finland and a prominent source of diffuse pollution in many water courses.
      


Diffuse pollution originate from diffuse areas that intermittently contribute pollutants tsurface and groundwater.Normally,the soil erosion and application of chemical fertilizer and pesticide in crop roduction,domesti animal waste in rural areas,surface runoff from urban areas,logging operations are considered as the important source of diffuse pollution.The recent research on diffuse pollution abroad is reviewed in this paper,including of the process of occurrence,loading and transformation...

Diffuse pollution originate from diffuse areas that intermittently contribute pollutants tsurface and groundwater.Normally,the soil erosion and application of chemical fertilizer and pesticide in crop roduction,domesti animal waste in rural areas,surface runoff from urban areas,logging operations are considered as the important source of diffuse pollution.The recent research on diffuse pollution abroad is reviewed in this paper,including of the process of occurrence,loading and transformation of pollutant,modeling,control and management.

降雨径流污染指在降雨径流的淋溶和冲刷作用下 ,大气、地面和土壤中的污染物扩散性地进入地表水和地下水中而造成水环境污染 ,主要起源于农业生产过程中大量使用化肥和农药 ,土壤侵蚀 ,牡畜粪便 ,城市地表径流以及森林采伐活动 .本文概述了国外降雨径流污染的研究成果 ,介绍了各种类型的降雨径流污染的发生过程和污染物的迁移转化规律 ,模型化研究 ,不同类型的控制和管理措施 .

Twenty-one urban topsoils were sampled from the city of Xuzhou and concentrations of thirty elements (Zn, Cd, As, Hg, Sb, Sn, Ag, Fe, Se, Sc, Ba, Bi, Pb, Cu, Ni, Cr, Mn, Mo, Be, Ti, Al, Ga, Li, Co, etc.) were analyzed. Compared to the arithmetic means of natural soils of China, Zn, Cd, Hg, Sb, Sn, Ag, etc. have higher accumulation in the Xuzhou urban topsoils than that of the others (e.g. Fe, Se, Sc, Ba, Bi, Pb, Cu, Ni, Cr, Mn, Mo, Be, Ti, Al, Ga, Li, Co). Spatial distributions of metals contaminated were constructed...

Twenty-one urban topsoils were sampled from the city of Xuzhou and concentrations of thirty elements (Zn, Cd, As, Hg, Sb, Sn, Ag, Fe, Se, Sc, Ba, Bi, Pb, Cu, Ni, Cr, Mn, Mo, Be, Ti, Al, Ga, Li, Co, etc.) were analyzed. Compared to the arithmetic means of natural soils of China, Zn, Cd, Hg, Sb, Sn, Ag, etc. have higher accumulation in the Xuzhou urban topsoils than that of the others (e.g. Fe, Se, Sc, Ba, Bi, Pb, Cu, Ni, Cr, Mn, Mo, Be, Ti, Al, Ga, Li, Co). Spatial distributions of metals contaminated were constructed for the whole urban area pointing to vehicle traffic as the main source of diffuse pollution (e.g. Pb, Cu, Zn, Cd) and also showing the contribution of point sources of pollution to urban surface soils. Environmental risk index also indicate higher risk as result of heavy metal pollution in urban surface soils. The frequency of samples that belong to or surpass the grade of medium environmental risk is almost 40% and the area that has high environmental risk is mainly confined to industrial zone (e.g. ironsteel plant and chemical mechanical factory).

研究了徐州城市表层土壤的21个样品中30种元素的富集与分布特征。结果表明,与我国土壤元素的背景值(算术平均值)相比,表层土壤中Zn、Cd、As、Hg、Sb、Sn、Ag等元素富集大;Fe、Se、Sc、Ba、Bi、Pb、Cu、Ni、Cr、Mn、Mo、Be、Ti、Al、Ga、Li、Co等元素的富集较小。污染元素的空间分布特征显示了Zn、Cu、Pb、Cd等元素主要与交通运输等扩散污染源相关,而元素As、Sb的空间分布主要与工业污染源(点源)有关。环境风险指数的计算结果表明,表层土壤中重金属污染具有较大的环境风险,其中属于中等环境风险级别以上的样品占近40%,而且高风险区域主要集中在钢铁厂和化机厂等工业区范围内。

 
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