Performance of automated methods for flash flood inundation mapping: a comparison of a digital terrain model (DTM) filling and two hydrodynamic methods
Performance of automated methods for flash flood inundation mapping: a comparison of a digital terrain model (DTM) filling and two hydrodynamic methods
复制标题
山洪淹没测绘自动化方法的性能：数字地形模型 (DTM) 填充和两种水动力方法的比较
DOI：
10.5194/hess-25-2979-2021
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发表时间：
2021
影响因子：
6.3
通讯作者：
Frédéric Pons
中科院分区：
文献类型：
--
作者：
Nabil Hocini;O. Payrastre;F. Bourgin;E. Gaume;P. Davy;D. Lague;Léa Poinsignon;Frédéric Pons
摘要。在水源集水区观测到的山洪暴发常常在世界范围内造成灾难性的物质和人类损失。考虑到数量多，数量少
Abstract. Flash floods observed in headwater catchments often cause catastrophic material and human damage worldwide. Considering the large number of small
watercourses possibly affected, the use of automated methods for flood inundation mapping at a regional scale can be of great help for the
identification of threatened areas and the prediction of potential impacts of these floods. An application of three mapping methods of increasing
level of complexity is presented herein, including a digital terrain model (DTM) filling approach (height above nearest drainage/Manning–Strickler
or HAND/MS) and two hydrodynamic methods (caRtino 1D and Floodos 2D). These methods are used to estimate the flooded areas of three major flash
floods observed during the last 10 years in southeastern France, i.e., the 15 June 2010 flooding of the Argens river and its tributaries (585 km of
river reaches), the 3 October 2015 flooding of small coastal rivers of the French Riviera (131 km of river reaches) and the 15 October 2018
flooding of the Aude river and its tributaries (561 km of river reaches). The common features of the three mapping approaches are their high
level of automation, their application based on a high-resolution (5 m) DTM, and their reasonable computation times. Hydraulic simulations
are run in steady-state regime, based on peak discharges estimated using a rainfall–runoff model preliminarily adjusted for each event. The simulation
results are compared with the reported flood extent maps and the high water level marks. A clear grading of the tested methods is revealed,
illustrating some limits of the HAND/MS approach and an overall better performance of hydraulic models which solve the shallow water equations. With
these methods, a good retrieval of the inundated areas is illustrated by critical success index (CSI) median values close to 80 %, and the
errors on water levels remain mostly below 80 cm for the 2D Floodos approach. The most important remaining errors are related to limits of
the DTM, such as the lack of bathymetric information, uncertainties on embankment elevation, and possible bridge blockages not accounted for in
the models.
影响因子：
6.3
作者：
F. Pappenberger;E. Dutra;F. Wetterhall;H. Cloke
通讯作者：
F. Pappenberger;E. Dutra;F. Wetterhall;H. Cloke
影响因子：
4.9
作者：
Neal, Jeffrey;Dunne, Toby;Bates, Paul
通讯作者：
Bates, Paul
将河道横截面几何不确定性有效纳入区域和全球规模洪水淹没模型
影响因子：
6.4
作者：
Neal J
通讯作者：
Neal J