DOI: 10.1002/2014GL059744
论文题名: Regional flood dynamics in a bifurcating mega delta simulated in a global river model
作者: Yamazaki D. ; Sato T. ; Kanae S. ; Hirabayashi Y. ; Bates P.D.
刊名: Geophysical Research Letters
ISSN: 0094-10093
EISSN: 1944-9824
出版年: 2014
卷: 41, 期: 9 起始页码: 3127
结束页码: 3135
语种: 英语
英文关键词: delta
; global modeling
; hydrodynamics
Scopus关键词: Banks (bodies of water)
; Catchments
; Computer simulation
; Floods
; Hydrodynamics
; Rivers
; Surveying
; Water levels
; Computational schemes
; delta
; Digital elevation model
; Floodplain modeling
; Global modeling
; Hydrodynamic model
; Hydrodynamic simulation
; Shuttle radar topography mission
; Bifurcation (mathematics)
; bifurcation
; catchment
; delta
; digital elevation model
; flood routing
; floodplain
; global perspective
; hydrodynamics
; hydrological modeling
; river flow
; river system
; Shuttle Radar Topography Mission
; water level
; Mekong Delta
; Mekong River
; Viet Nam
英文摘要: In this paper we show the importance of bifurcation channels for flow in river mega deltas through the use of a new computational scheme implemented in the global hydrodynamic model, CaMa-Flood (Catchment-based Macro-scale Floodplain model). First, we developed a new river network map based on SRTM3 DEM (Shuttle Radar Topography Mission 3 arc-second Digital Elevation Model) and HydroSHEDS (hydrological data and maps based on shuttle elevation derivatives at multiple scales) which includes bifurcation channels. Next, we implemented a new bifurcation scheme in CaMa-Flood capable of routing flow along this network and used the model to simulate the Mekong River. We show that in the Mekong delta such channels route about 50% of total flow and that their representation is essential for realistic hydrodynamic simulations. A simulation without bifurcation channels was obviously unrealistic because no flow occurred between the mainstem and adjacent channels even when their water level difference was >6m. The bifurcation channels are extracted from globally available data sets; thus, it is straightforward to expand the proposed scheme to global-scale studies. Key Points Automatic delineation of bifurcation channels in a global river network map A new channel bifurcation flow scheme in a global hydrodynamic model Simulation with bifurcation flow shows reasonable agreement to observations © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901947958&doi=10.1002%2f2014GL059744&partnerID=40&md5=a68d642bb054b4e607d3a99429f470f3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7357
Appears in Collections: 气候减缓与适应
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作者单位: Department of Integrated Climate Change Projection Research, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Recommended Citation:
Yamazaki D.,Sato T.,Kanae S.,et al. Regional flood dynamics in a bifurcating mega delta simulated in a global river model[J]. Geophysical Research Letters,2014-01-01,41(9).