Department of Environmental Engineering, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China.
J Environ Manage. 2013 Jul 15;123:34-41. doi: 10.1016/j.jenvman.2013.02.033. Epub 2013 Apr 9.
Assessing the driving forces of sandy desertification is fundamental and important for its control. It has been widely accepted that both climatic conditions and land use have great impact on sandy desertification in northern China. However, the relative role and synergistic effect of each driving force of sandy desertification are still not clear. In this paper, an indicator named as SI was defined to represent the integrated probability of sandy desertification caused by land use. A quantitative method was developed for characterizing the relative roles of annual precipitation and land use to sandy desertification in both spatial and temporal dimensions at county level. Results showed that, at county level, land use was the main cause of sandy desertification for Naiman Banner since 1987-2009. In the case of spatial dimension, the different combination of land use types decided the distribution of sandy desertification probability and finally decided the spatial pattern of bared sand land. In the case of temporal dimension, the synergistic effect of land use and precipitation highly influenced the spatial distribution of sandy desertification.
评估沙质荒漠化的驱动因素对于其防治至关重要。人们普遍认为，气候条件和土地利用对中国北方的沙质荒漠化都有很大的影响。然而，沙质荒漠化各个驱动因素的相对作用和协同效应仍不清楚。本文定义了一个名为 SI 的指标来表示土地利用引起沙质荒漠化的综合概率。开发了一种定量方法，用于在县级尺度上从时空两个维度描述年降水量和土地利用对沙质荒漠化的相对作用。结果表明，自 1987 年至 2009 年，奈曼旗的土地利用是沙质荒漠化的主要原因。在空间维度上，不同土地利用类型的组合决定了沙质荒漠化概率的分布，最终决定了裸沙地的空间格局。在时间维度上，土地利用和降水的协同效应强烈影响了沙质荒漠化的空间分布。
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