DOI: 10.5194/hess-22-5967-2018
论文题名: Inundation mapping based on reach-scale effective geometry
作者: Rebolho C. ; Andréassian V. ; Le Moine N.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期: 11 起始页码: 5967
结束页码: 5985
语种: 英语
Scopus关键词: Equations of state
; Geometry
; Mapping
; Efficiency criteria
; Extreme flood events
; Geometrical property
; Hydraulic geometry
; Inundation mappings
; Model complexity
; Model performance
; Steady-state flows
; Floods
; accuracy assessment
; computer simulation
; cross section
; digital elevation model
; drainage
; floodplain
; geometry
; mapping
; performance assessment
; spatial distribution
; steady-state equilibrium
; streamflow
; France
英文摘要: The production of spatially accurate representations of potential inundation is often limited by the lack of available data as well as model complexity. We present in this paper a new approach for rapid inundation mapping, MHYST, which is well adapted for data-scarce areas; it combines hydraulic geometry concepts for channels and DEM data for floodplains. Its originality lies in the fact that it does not work at the cross section scale but computes effective geometrical properties to describe the reach scale. Combining reach-scale geometrical properties with 1-D steady-state flow equations, MHYST computes a topographically coherent relation between the height above nearest drainage and streamflow. This relation can then be used on a past or future event to produce inundation maps. The MHYST approach is tested here on an extreme flood event that occurred in France in May-June 2016. The results indicate that it has a tendency to slightly underestimate inundation extents, although efficiency criteria values are clearly encouraging. The spatial distribution of model performance is discussed and it shows that the model can perform very well on most reaches, but has difficulties modelling the more complex, urbanised reaches. MHYST should not be seen as a rival to detailed inundation studies, but as a first approximation able to rapidly provide inundation maps in data-scarce areas. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163131
Appears in Collections: 气候变化与战略
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作者单位: Rebolho, C., Irstea, UR HYCAR, 1 Rue Pierre-Gilles de Gennes, Antony, 92160, France; Andréassian, V., Irstea, UR HYCAR, 1 Rue Pierre-Gilles de Gennes, Antony, 92160, France; Le Moine, N., Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR 7619 Metis, 4 Place Jussieu, Paris, 75005, France
Recommended Citation:
Rebolho C.,Andréassian V.,Le Moine N.. Inundation mapping based on reach-scale effective geometry[J]. Hydrology and Earth System Sciences,2018-01-01,22(11)