Soil vulnerability and sensitivity to acid deposition in China

文献类型： 外文期刊

第一作者： Tao, FL

作者： Tao, FL;Hayashi, Y;Lin, ED

作者机构：

关键词： acid deposition;China;soil sensitivity;soil vulnerability;weathering rate of soil mineral

期刊名称：WATER AIR AND SOIL POLLUTION （ 影响因子：2.52； 五年影响因子：2.574 ）

ISSN： 0049-6979

年卷期： 2002 年 140 卷 1-4 期

页码：

收录情况： SCI

摘要： Sensitivity, in this context, refers to `the degree to which a system will respond to acid deposition', while vulnerability is `the extent to which acid deposition may damage or harm system'. Thus, sensitivity stresses the risk of an increase in the rate of change of the soil chemistry (the acidification rate), and vulnerability stresses the risk of damage to an organism or system (the acidification state). With regard to acid deposition effects, both vulnerable and sensitive ecosystems are of concern; however, they are usually not well distinguished. The identification of ecosystems vulnerable (at risk for damage) or sensitive (high degree of response) to acid deposition is very important if policy makers are to derive cost-effective pollution control strategies. In this paper, the relative vulnerability and sensitivity of soils in China are assessed on the basis of soil base saturation and cation exchange capacity. Vulnerable and sensitive soils, as well as the risks associated with acid deposition, are identified. The characteristics of these two types of soils and their responses to acid deposition are discussed. Finally, results obtained by using different approaches are compared. The results show that the most vulnerable areas are located mainly in Guangdong, Guangxi, Guizhou, and Sichuan provinces and in the southern part of Yunnan province. On the other hand, the most sensitive areas are located mainly in Zhejiang, Jiangxi, Hunan, and Fujian provinces and in the northern part of Yunnan province. Combining the distribution of vulnerability and sensitivity with the sulfur deposition shows that the areas around Chongqing City and central Guizhou province are at high risk for damage by acid deposition; central Zhejiang province and the boundary region between Hunan and Jiangxi provinces would be at high risk for a high rate of acidification if acid deposition were to increase.

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