期刊
CATENA
卷 130, 期 -, 页码 69-81出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catena.2014.12.004
关键词
Rhine; Palaeoflood; End-member modelling; Flood deposits; Grain-size distribution; Abandoned channel
资金
- Deltares BGS
- TNO
- Utrecht University
Objective: The objective of this research was to unlock the potential of fluvial archives to create flood chronologies, based on grain-size characteristics,of flood deposits located in two recently formed fluvio-lacustrine sequences. Methods: Grain-size data was compared with contemporaneous discharge measurements (for the Lower Rhine, The Netherlands). Regression relations between coarse-tail,grain-size parameters and measured discharge were established for the last similar to 240 years, and applied to the older parts of both cores - resulting in peak discharge estimates back to AD similar to 1550. Results: Grain-size descriptive parameters such as the 95th percentile and end-member modelling outcomes correlate well with discharge and turn out to be sensitive proxies for inferring flood magnitudes. Locally, geomorphological changes influence the relation between peak discharge magnitudes and flood bed coarseness, but these can be assessed, using continuous flood layer and background sedimentation measurements to standardize grain-size descriptive parameters. Conclusion/implications: Flood records distilled from sedimentary archives hold great potential for extending existing records of observed discharge and aid establishment of design discharge for flood protection measures and assessment of non-stationarity of the flooding regime due to climatic and anthropogenic forcing. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据