DOI: 10.5194/hess-22-5599-2018
论文题名: Anatomy of simultaneous flood peaks at a lowland confluence
作者: Geertsema T.J. ; Teuling A.J. ; Uijlenhoet R. ; Torfs P.J.J.F. ; Hoitink A.J.F.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期: 10 起始页码: 5599
结束页码: 5613
语种: 英语
Scopus关键词: Flood control
; Floods
; Water levels
; Water pollution
; Economic values
; Flood waves
; Long duration
; Main rivers
; Meuse rivers
; ON dynamics
; Physical process
; Water level dynamics
; Rivers
; anatomy
; backwater
; confluence
; discharge
; flood
; flood wave
; flooding
; lowland environment
; peak flow
; water level
; Aa River
; Antwerp [Belgium]
; Belgium
; Dommel River
; Meuse River
英文摘要: Lowlands are vulnerable to flooding due to their mild topography in often densely populated areas with high social and economic value. Moreover, multiple physical processes coincide in lowland areas, such as those involved in river-sea interactions and in merging rivers at confluences. Simultaneous occurrence of such processes can result in amplifying or attenuating effects on water levels. Our aim is to understand the mechanisms behind simultaneous occurrence of discharge waves in a river and its lowland tributaries. Here, we introduce a new way of analyzing lowland discharge and water level dynamics, by tracing individual flood waves based on dynamic time warping. We take the confluence of the Meuse River (∼ 33000km2) with the joining tributaries of the Dommel and Aa rivers as an example, especially because the January 1995 flood at this confluence was the result of the simultaneous occurrence of discharge peaks in the main stream and the tributaries and because independent observations of water levels and discharge are available for a longer period. The analysis shows that the exact timing of the arrival of discharge peaks is of little relevance because of the long duration of the average discharge wave compared to typical time lags between peaks. The discharge waves last on average 9 days, whereas the lag time between discharge peaks in the main river and the tributaries is typically 3 days. This results in backwaters that can rise up to 1.5 m over a distance of 4 km from the confluence. Thus, local measures to reduce the impact of flooding around the confluence should account for the long duration of flood peaks in the main system. © 2018 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163154
Appears in Collections: 气候变化与战略
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作者单位: Geertsema, T.J., Hydrology and Quantitative Water Management Group, Wageningen University, Wageningen, Netherlands; Teuling, A.J., Hydrology and Quantitative Water Management Group, Wageningen University, Wageningen, Netherlands; Uijlenhoet, R., Hydrology and Quantitative Water Management Group, Wageningen University, Wageningen, Netherlands; Torfs, P.J.J.F., Hydrology and Quantitative Water Management Group, Wageningen University, Wageningen, Netherlands; Hoitink, A.J.F., Hydrology and Quantitative Water Management Group, Wageningen University, Wageningen, Netherlands
Recommended Citation:
Geertsema T.J.,Teuling A.J.,Uijlenhoet R.,et al. Anatomy of simultaneous flood peaks at a lowland confluence[J]. Hydrology and Earth System Sciences,2018-01-01,22(10)