Modeling redistribution of α-HCH in Chinese soil induced by environment factors

Tian, Chongguo; Lau, Nap-yin; Ma, Jianmin; Tang, Jianhui; Li, Yi-Fan

Modeling redistribution of α-HCH in Chinese soil induced by environment factors

2011

Tian, Chongguo | Lau, Nap-yin | Ma, Jianmin | Tang, Jianhui | Li, Yi-Fan

This study explores long-term environmental fate of α-HCH in China from 1952 to 2007 using ChnGPERM (Chinese Gridded Pesticide Emission and Residue Model). The model captures well the temporal and spatial variations of α-HCH concentration in Chinese soils by comparing with a number of measured data across China in different periods. The results demonstrate α-HCH grasshopping effect in Eastern China and reveal several important features of the chemical in Northeast and Southeast China. It is found that Northeast China is a prominent sink region of α-HCH emitted from Chinese sources and α-HCH contamination in Southwest China is largely attributed to foreign sources. Southeast China is shown to be a major source contributing to α-HCH contamination in Northeast China, incurred by several environmental factors including temperature, soil organic carbon content, wind field and precipitation.

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