Automatic delineation of geomorphological slope units with r.slopeunits v1.0 and their optimization for landslide susceptibility modeling
Automatic delineation of geomorphological slope units with r.slopeunits v1.0 and their optimization for landslide susceptibility modeling
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DOI：
10.5194/gmd-9-3975-2016
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发表时间：
2016-11-09
影响因子：
5.1
通讯作者：
Guzzetti, Fausto
中科院分区：
文献类型：
--
作者：
Alvioli, Massimiliano;Marchesini, Ivan;Guzzetti, Fausto
将景观自动细分为地形单元仍然是一个挑战。坡度单元是以排水线和分水线为边界的地形单元，但由于缺乏可靠的自动划分软件，它们在水文和地貌研究中的使用受到限制。我们介绍了一个自动绘制坡度单元的软件r.slopeunits，给出了一个数字高程模型和一些输入参数。我们进一步提出了一种方法来选择最佳参数控制的地形细分滑坡敏感性建模。我们在意大利中部测试了软件和优化方法，那里的地形，滑坡和地质环境信息是可用的。该软件能够捕捉景观的变异性，并将研究区域划分为适合滑坡易感性建模和分区的斜坡单元。我们期望r.slopeunits在不同的自然地理环境中使用，以产生可靠的和可重复的滑坡易感性分区。
Automatic subdivision of landscapes into terrain units remains a challenge. Slope units are terrain units bounded by drainage and divide lines, but their use in hydrological and geomorphological studies is limited because of the lack of reliable software for their automatic delineation. We present the r.slopeunits software for the automatic delineation of slope units, given a digital elevation model and a few input parameters. We further propose an approach for the selection of optimal parameters controlling the terrain subdivision for landslide susceptibility modeling. We tested the software and the optimization approach in central Italy, where terrain, landslide, and geo-environmental information was available. The software was capable of capturing the variability of the landscape and partitioning the study area into slope units suited for landslide susceptibility modeling and zonation. We expect r.slopeunits to be used in different physiographical settings for the production of reliable and reproducible landslide susceptibility zonations.