The influence of DEM spatial resolution on landslide susceptibility mapping in the Baxie River basin, NW China
The influence of DEM spatial resolution on landslide susceptibility mapping in the Baxie River basin, NW China
复制标题
DEM空间分辨率对八斜河流域滑坡敏感性测绘的影响
DOI：
10.1007/s11069-020-03899-9
复制
发表时间：
2020-03-18
期刊：
影响因子：
3.7
通讯作者：
Hong, Haoyuan
中科院分区：
文献类型：
--
作者：
Chen, Zhuo;Ye, Fei;Hong, Haoyuan
选择适当的地图分辨率对于滑坡敏感性评估非常重要。然而，目前没有一致的客观标准应用于地图分辨率的选择。本研究结合坡度单位，利用三种统计模型（频率比、熵指数和证据权重）探讨了数字高程模型 (DEM) 分辨率对磁化率建模的影响。研究了七种不同的空间分辨率（30、40、50、60、70、80 和 90 m）和三种统计模型。对于每个分辨率，我们使用曲线下面积 (AUC) 分析来比较三个模型的性能。结果表明，与统计模型无关，最佳性能是在 70 m DEM 分辨率下产生的。这凸显出更精细的分辨率并不一定会导致滑坡敏感性测绘的预测精度更高。相反，频率比模型似乎最适合较粗的分辨率（即 70、80 和 90 m）。
The selection of an appropriate map resolution is highly important for landslide susceptibility assessment. No consistent objective criteria, however, are currently applied to the choice of map resolution. This research, in conjunction with slope units, explores the effect of digital elevation model (DEM) resolution on susceptibility modelling using three statistical models (frequency ratio, index of entropy, and weight of evidence). Seven different spatial resolutions (30, 40, 50, 60, 70, 80, and 90 m) and three statistical models are investigated. For each resolution, we compare the performance of the three models using area under curve (AUC) analysis. The results show that, independent of the statistical models, the best performances are produced at 70 m DEM resolution. This highlights that finer resolutions do not necessarily lead to higher predictive accuracy in landslide susceptibility mapping. Rather, the frequency ratio model seems to be optimal for the coarser resolutions (i.e. 70, 80, and 90 m).