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DOI	10.5194/hess-22-5599-2018
	Anatomy of simultaneous flood peaks at a lowland confluence
	Geertsema T.J.; Teuling A.J.; Uijlenhoet R.; Torfs P.J.J.F.; Hoitink A.J.F.
发表日期	2018
ISSN	1027-5606
起始页码	5599
结束页码	5613
卷号	22 期号:10
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).
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159871
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
推荐引用方式 GB/T 7714	Geertsema T.J.,Teuling A.J.,Uijlenhoet R.,et al. Anatomy of simultaneous flood peaks at a lowland confluence[J],2018,22(10).
APA	Geertsema T.J.,Teuling A.J.,Uijlenhoet R.,Torfs P.J.J.F.,&Hoitink A.J.F..(2018).Anatomy of simultaneous flood peaks at a lowland confluence.Hydrology and Earth System Sciences,22(10).
MLA	Geertsema T.J.,et al."Anatomy of simultaneous flood peaks at a lowland confluence".Hydrology and Earth System Sciences 22.10(2018).