DOI: 10.1007/s11069-021-04892-6
论文题名: GIS derived synthetic rating curves and HAND model to support on-the-fly flood mapping
作者: Scriven B.W.G. ; McGrath H. ; Stefanakis E.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
语种: 英语
中文关键词: Flood
; HAND
; Inundation mapping
; Rating curves
; Roughness coefficient
英文摘要: A timely and cost-effective method of creating inundation maps could assist first responders in allocating resources and personnel in the event of a flood or in preparation of a future disaster. The Height Above Nearest Drainage (HAND) model could be implemented into an on-the-fly flood mapping application for a Canada-wide service. The HAND model requires water level (m) data inputs while many sources of hydrological data in Canada only provide discharge (m3/sec) data. Synthetic rating curves (SRCs), created using river geometry/characteristics and the Manning’s formula, could be utilized to provide an approximate water level given a discharge input. A challenge with creating SRCs includes representing how multiple different land covers will slow impact flow due to texture and bulky features (i.e., smooth asphalt versus rocky river channel); this relates to the roughness coefficient (n). In our study, two methods of representing multiple n values were experimented with (a weighted method and a minimum-median method) and were compared to using a fixed n method. A custom ArcGIS tool, Canadian Estimator of Ratings Curves using HAND and Discharge (CERC-HAND-D), was developed to create SRCs using all three methods. Control data were sourced from gauge stations across Canada in the form of rating curves. Results indicate that in areas with medium to medium–high river gradients (S > 0.002 m/m) or with river reaches under 5 km, the CERC-HAND-D tool creates more accurate SRCs (NRMSE = 3.7–8.8%, Percent Bias = −7.8%—9.4%), with the minimum-median method being the preferred n method. © 2021, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169349
Appears in Collections: 气候变化与战略
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作者单位: Department of Geomatics Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive N.W, Calgary, T2N 1N4, Canada; Natural Resources Canada, Canada Centre for Mapping and Earth Observations, 560 Rochester St, Ottawa, ON K1S 5K2, Canada
Recommended Citation:
Scriven B.W.G.,McGrath H.,Stefanakis E.. GIS derived synthetic rating curves and HAND model to support on-the-fly flood mapping[J]. Natural Hazards,2021-01-01