Study on Evaluation and Spatial Distribution of Water and Soil Heavy Metals Pollution in Danjiangkou Reservoir

Authors: Sheng Ye*,
Topics: Environment, Environmental Science, Sustainability Science
Keywords: water, soil, ecological risk.
Session Type: Lightning Paper
Day: 4/5/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Hampton Room, Omni, East
Presentation File: No File Uploaded

This article analyzed assessment on water, soil heavy metal contamination at home and abroad, selected mercury, cadmium, plumbum, cuprum, zinc, chromium, arsenic that is detrimental to human body as research object, evaluated heavy metal contamination of water and ecological risks of heavy metal of soil in Danjiangkou reservoir. The study shows that the water level of heavy metal contamination levels Ⅱ12.20%, Ⅲ 4.8%, Ⅳ 0%, Ⅴ 2.44% among 41 water sampling points. Zinc contributes most to the heavy metal contamination of water quality, and the weight is 27.66%, followed by mercury (26.60%), chromium (25.04%). Among 812 soil sampling points, Ⅰ level accounted for 39.90%, Ⅱ accounted for 56.65%, Ⅲ accounted for 56.65%, Ⅳ accounted for 0.12%, Ⅴ accounted for 0.12%. Soil sample points. Main pollutants are cadmium and mercury. Average of comprehensive potential ecological risk index of heavy metal (RI) is 168.20 which stands for medium ecological risk. According to " surface water environment quality standard" (GB 3838-2002), overall, situation of heavy metal contamination of water in Danjiang reservoir is good. Ecological risk of surface soil around the reservoir is mild. Strong and extremely strong ecological risk area accounted for 0.24%, mainly distributed in the town, construction land and rural residential community. Spatial autocorrelation analysis of water samples and the soil sample of showed that there is clear positive correlation between water and soil around the reservoir.

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