Chengdu Ecological Environmental Geochemistry Evaluation

With the development of urbanization, the problem of urban pollution has been paid more attention. So far, the studies of urban geochemistry are based on one aspect of urban ecosystem (such as air, soil, water, plant), it lacks the study of whole urban ecosystem, and it doesn't reveal the transfer track and rule of element.From the way of urban ecosystem geochemistry, this thesis systematically studies urban soil, air dust near the ground, plants, water and sediment, which has found out the spatial distribution characteristics of element in urban soil, air dust near the ground, plants, water and sediment .Comparison with relative national quality standards and international retative research field of urban, the thesis puts up the ecosystem geochemistry quality assessment of Chengdu.Based on the research of above, the thesis studies element transfer in the system of water -soil -plants -air dust. The thesis also studies the environmental health effect , it has primary studied the pollution source and element transfer track in urban ecosystem.The research offers basic geochemistry data and scientific decision-making gist in ChengDu urban ecosystem regulation and urban sustainable development, it has also established a steady groundwork in the study of urban ecosystem environment.