COMPARING A LARGE-SCALE DEM-BASED FLOODPLAIN DELINEATION ALGORITHM WITH STANDARD FLOOD MAPS: THE TIBER RIVER BASIN CASE STUDY
COMPARING A LARGE-SCALE DEM-BASED FLOODPLAIN DELINEATION ALGORITHM WITH STANDARD FLOOD MAPS: THE TIBER RIVER BASIN CASE STUDY
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DOI：
10.1002/ird.1818
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发表时间：
2013-12-01
影响因子：
1.9
通讯作者：
Ubertini, Lucio
中科院分区：
文献类型：
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作者：
Nardi, Fernando;Biscarini, Chiara;Ubertini, Lucio
应用大规模泛滥平原圈定算法，在流域尺度上识别潜在的淹没区域。该模型主要使用数字高程模型(DEM)和出水口设计洪峰流量作为输入数据，在地理信息系统(GIS)中实现。它实现了一个初步的基于地理信息系统的地形分析框架，用于估计河流网络、地表水流方向和排水网格，而核心算法实现了用于流量和水流高度估计的河流断面自动提取。然后，通过将泛滥平原单元过滤为高程低于相应渠道水流高度的单元来实现划定。建议的水文地貌泛滥平原‘，在台伯河流域(约.利用美国航天局航天飞机雷达地形任务(SRTM)90米分辨率的全球数字高程模型(DEM)，与台伯河流域管理局的官方洪水图进行比较，以评价标准洪水图结果的模型行为。所介绍的案例研究显示了利用自动地理信息系统算法和大量可用的遥感数据在全球范围内初步查明泛滥平原足迹的潜力。版权所有(C)2013 John Wiley&Sons，Ltd.
A large-scale floodplain delineation algorithm is applied to identify potentially inundated areas at the basin scale. The model, which mainly uses a digital elevation model (DEM) and design flood peak discharge at the outlet as input data, is implemented within a geographic information system (GIS). It implements a preliminary GIS-based terrain analysis framework for estimating the stream network, surface flow direction and drainage grids, while the core algorithm implements an automated fluvial cross-section extraction for discharge and flow height estimation. The delineation is then implemented by filtering the floodplain cells as those cells whose elevation is lower than the corresponding channel flow height. The proposed hydrogeomorphic floodplain', obtained on the Tiber River basin (approx. 17 000 km(2)) using the global NASA Shuttle Radar Topography Mission (SRTM) DEM at 90 m resolution, is compared to the official flood maps of the Tiber River Basin Authority to evaluate the model behaviour with respect to standard flood mapping results. The presented case study shows the potential of using an automated GIS algorithm and largely available remotely sensed data for the preliminary identification of the floodplain footprint at the global scale. Copyright (c) 2013 John Wiley & Sons, Ltd.