A river ran through it: Floodplains as America's newest relict landform.
A river ran through it: Floodplains as America's newest relict landform.
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DOI：
10.1126/sciadv.abo1082
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发表时间：
2022-06-24
期刊：
影响因子：
13.6
通讯作者：
中科院分区：
文献类型：
--
作者：
人工堤防是人类对河流廊道的一种主要改造方式，但我们对人工堤防在区域和更大尺度上对河漫滩范围的影响尚不清楚。我们使用人工堤坝数据库、洪水平原区域的划定和从地形中删除人工堤坝的组合，估计了美国（CONUS）的人工堤坝导致的河流-洪泛区连通性的变化。研究结果表明，人工堤防不仅减少了河漫滩的面积，而且改变了河漫滩连通性的位置。人为连通和非连通地区的土地覆盖类型相似，且以耕地、湿地、森林和发达土地覆盖类型为主，CONUS整个漫滩面积的30%以上为耕地或发达土地覆盖。该研究表明，人工堤防会导致河流与漫滩连通性的复杂变化，并可能增加某些河流的淹没面积。对美国邻近洪泛区人工堤坝影响的分析揭示了一些意想不到的结果。
Artificial levees are a major human modification of river corridors, but we still do not have a clear understanding of how artificial levees affect floodplain extent at regional and larger scales. We estimated changes in river-floodplain connectivity due to artificial levees in the contiguous United States (CONUS) using a combination of artificial levee databases, delineations of floodplain areas, and deletion of artificial levees from topography. Our results indicate that artificial levees do not only decrease floodplain extent but also alter locations of floodplain connectivity. Anthropogenically connected and disconnected locations are similar in land cover and are predominantly, in decreasing order of extent, cultivated, wetland, forested, and developed land cover types, with more than 30% of the entire floodplain area in the CONUS cultivated or developed. This study indicates that artificial levees cause complex changes in river-floodplain connectivity and can increase flooded areas in some rivers. This analysis of artificial levee impacts on floodplains in the contiguous United States reveals some unexpected results.
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影响因子：
9.8
作者：
Nardi, F.;Annis, A.;Grimaldi, S.
通讯作者：
Grimaldi, S.
影响因子：
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