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首页> 外文期刊>The Science of the Total Environment >Impacts of anthropogenic land use/cover changes on soil wind erosion in China
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Impacts of anthropogenic land use/cover changes on soil wind erosion in China

机译：人为土地利用/覆盖变化对中国土壤风蚀的影响

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Assessing the impacts of land use/cover change (LUCC) on the aeolian process is crucial for improving regional ecosystem services and sustainable development. The objective of the study were to 1) examine the spatiotemporal patterns of the soil wind erosion modulus (SWEM) in China from 1990 to 2015, and 2) reveal the contributions of LUCC to SWEM dynamics. The annual SWEM derived by the revised wind erosion equation (RWEQ) was analyzed at regional and sub-regional scales using statistical analysis. The impacts of various LUCCs on SWEM were further assessed in each county. The results showed that the regions that experienced severe wind erosion (SWEM 50 t/(ha.a)) accounted for 8.91% of all of China. The average SWEM generally decreased by half from 1990 to 2015. Large SWEM differences were found among various land use/cover types. The SWEM from desert was two times or higher than that from sparse grass, cropland, and woodland; moreover, that of dense grass was the lowest in arid/semiarid areas. The conversion of grassland/woodland to cropland and desert expansion during 1990-2000 induced a net increase in total soil wind erosion of approximately 1205 x 10(4)t. With the implementation of ecological projects starting in the early 2000s, woodland/grassland was reconverted from cropland, and the eco-restoration of sparse grass and desert induced a net decrease in wind erosion of 278 x 10(4)t. All these indicated that anthropogenic activities in ecological projects had positive impacts in terms of reducing aeolian erosion intensity. We suggest that ecorestoration should be protected and consolidated in the future. Adaptive management is required to control wind erosion and improve ecosystem services and human wellbeing for people in China. (C) 2019 Elsevier B.V. All rights reserved.
机译：评估土地利用/覆被变化（LUCC）对风沙过程的影响对于改善区域生态系统服务和可持续发展至关重要。该研究的目的是：1）研究1990年至2015年中国土壤风蚀模量（SWEM）的时空格局，以及2）揭示LUCC对SWEM动力学的贡献。通过修正的风蚀方程（RWEQ）得出的年度SWEM在区域和次区域范围内使用统计分析进行了分析。每个县都进一步评估了各种LUCC对SWEM的影响。结果表明，遭受严重风蚀的地区（SWEM> 50 t /（ha.a））占全国的8.91％。从1990年到2015年，平均SWEM总体下降了一半。在各种土地利用/覆盖类型之间发现SWEM差异很大。来自沙漠的SWEM是稀疏草木，农田和林地的SWEM的两倍或更高。此外，在干旱/半干旱地区，草丛密度最低。在1990-2000年期间，草地/林地向农田转变和沙漠扩张导致土壤风蚀总净增加约1205 x 10（4）t。随着2000年代初期开始实施的生态项目，林地/草地从农田中恢复过来，稀疏草和沙漠的生态恢复导致风蚀净减少278 x 10（4）t。所有这些表明，生态项目中的人为活动对减少风蚀强度具有积极的影响。我们建议生态保护应该在未来得到保护和巩固。需要采取自适应管理来控制风蚀并改善中国人民的生态系统服务和人类福祉。 （C）2019 Elsevier B.V.保留所有权利。

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