DOI: 10.5194/hess-19-631-2015
Scopus记录号: 2-s2.0-84922020886
论文题名: Assessing the impact of different sources of topographic data on 1-D hydraulic modelling of floods
作者: Md Ali A ; , Solomatine D ; P ; , Di Baldassarre G
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 1 起始页码: 631
结束页码: 643
语种: 英语
Scopus关键词: Costs
; Flood control
; Floods
; Hydraulic models
; Radar reflection
; Remote sensing
; Satellite imagery
; Surveying
; Surveys
; Tracking radar
; Uncertainty analysis
; Water levels
; Advanced spaceborne thermal emission and reflection radiometer
; Different resolutions
; Digital elevation model
; Flood inundation modelling
; Highest resolutions
; Light detection and ranging
; Remote sensing techniques
; Shuttle radar topography mission
; Optical radar
; airborne sensing
; assessment method
; ASTER
; digital elevation model
; hydrological modeling
; one-dimensional modeling
; remote sensing
; satellite imagery
; spatial resolution
; topography
; Johor
; Johor Basin
; Malaysia
; West Malaysia
英文摘要: Topographic data, such as digital elevation models (DEMs), are essential input in flood inundation modelling. DEMs can be derived from several sources either through remote sensing techniques (spaceborne or airborne imagery) or from traditional methods (ground survey). The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), the Shuttle Radar Topography Mission (SRTM), the light detection and ranging (lidar), and topographic contour maps are some of the most commonly used sources of data for DEMs. These DEMs are characterized by different precision and accuracy. On the one hand, the spatial resolution of low-cost DEMs from satellite imagery, such as ASTER and SRTM, is rather coarse (around 30 to 90 m). On the other hand, the lidar technique is able to produce high-resolution DEMs (at around 1 m), but at a much higher cost. Lastly, contour mapping based on ground survey is time consuming, particularly for higher scales, and may not be possible for some remote areas. The use of these different sources of DEM obviously affects the results of flood inundation models. This paper shows and compares a number of 1-D hydraulic models developed using HEC-RAS as model code and the aforementioned sources of DEM as geometric input. To test model selection, the outcomes of the 1-D models were also compared, in terms of flood water levels, to the results of 2-D models (LISFLOOD-FP). The study was carried out on a reach of the Johor River, in Malaysia. The effect of the different sources of DEMs (and different resolutions) was investigated by considering the performance of the hydraulic models in simulating flood water levels as well as inundation maps. The outcomes of our study show that the use of different DEMs has serious implications to the results of hydraulic models. The outcomes also indicate that the loss of model accuracy due to re-sampling the highest resolution DEM (i.e. lidar 1 m) to lower resolution is much less than the loss of model accuracy due to the use of low-cost DEM that have not only a lower resolution, but also a lower quality. Lastly, to better explore the sensitivity of the 1-D hydraulic models to different DEMs, we performed an uncertainty analysis based on the GLUE methodology. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78619
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Integrated Water System and Knowledge Management, UNESCO, IHE Institute for Water Education, Delft, Netherlands; Department of Irrigation and Drainage, Kuala Lumpur, Malaysia; Water Resource Section, Delft University of Technology, Netherlands; Department of Earth Sciences, Uppsala University, Sweden
Recommended Citation:
Md Ali A,, Solomatine D,P,et al. Assessing the impact of different sources of topographic data on 1-D hydraulic modelling of floods[J]. Hydrology and Earth System Sciences,2015-01-01,19(1)