How did the urban land in floodplains distribute and expand in China from 1992-2015?
How did the urban land in floodplains distribute and expand in China from 1992-2015?
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1992-2015年中国城市洪泛区用地如何分布和扩张？
DOI：
10.1088/1748-9326/aaac07
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发表时间：
2018-03-01
影响因子：
6.7
通讯作者：
Shi, Peijun
中科院分区：
文献类型：
--
作者：
Du, Shiqiang;He, Chunyang;Shi, Peijun
洪泛平原城市土地是洪水暴露的重要组成部分，其变化会引起洪水风险的变化。在快速城市化的背景下，中国的城市发展迅速，危及社会的可持续性。然而，尚未进行全国范围的超光速飞行模式和动态分析。因此，本研究旨在研究1992-2015年中国不同空间尺度（国家、区域、流域、子流域）的ULF时空变化。研究发现，2015年中国ULF占城市用地总面积的44.41%，是漫滩占全国土地总面积比例（12.06%）的3.68倍。1992—2015年，森林植被面积增加26.43 × 10 km(2)，增长542.21%。此外，在2015年至2050年期间，ULF面积预计将增长16.89x 10(3) km(2)（53.38%）。ULF的增长与中国的洪水发生密切相关，持续增长将对城市的可持续性构成相当大的挑战，特别是在防洪能力差的流域。因此，应更多地关注中国的超视场动态。
Urban land in floodplains (ULF) is a vital component of flood exposure and its variations can cause changes in flood risk. In the context of rapid urbanization, ULF is expanding rapidly in China and imperiling societal sustainability. However, a national-scale analysis of ULF patterns and dynamics has yet to be conducted. Therefore, this study aims to investigate the spatiotemporal changes in China's ULF at different spatial scales (the country, region, basin, and sub-basin scales) from 1992-2015. We found that ULF accounted for 44.41% of the total urban land in China in 2015, which was 3.68 times greater than the proportion of floodplains relative to the total land area in China (12.06%). From 1992-2015, the ULF area increased by 26.43 x 10(3) km(2), or 542.21%. Moreover, the ULF area is expected to grow by 16.89x 10(3) km(2) (53.38%) between 2015 and 2050. ULF growth was strongly associated with the flood occurrence in China, and continued growth will pose a considerable challenge to urban sustainability, particularly in basins with poor flood defenses. Greater attention should thus be paid to ULF dynamics in China.