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Data from: Anthropogenic drivers for the rapid formation of extremely large meanders during the Late Holocene

dataset
posted on 20.10.2020, 11:00 by C. (Cindy) Quik, J.H.J. (Jasper) Candel, B. (Bart) Makaske, G.J. (Gilbert) Maas, M. (Menno) Verplak, R. (Roy) van Beek, M. (Maurice) Paulissen, J. (Jakob) Wallinga

Large-amplitude meanders may form in low-energy rivers despite generally limited mobility in theses systems. Exceptionally large meanders which even extend beyond the valley sides have developed in the Overijsselse Vecht river (the Netherlands) between ca. 1400 CE (Common Era) and the early 1900s, when channelization occurred. Previous studies have attributed the enhanced lateral dynamics of this river to changes in river regime due to increased discharges, reflecting climate and/or land-use alterations in the catchment. This paper focuses on local aspects that may explain why exceptionally large meanders developed at specific sites. Through an integrated analysis based on archaeological, historical, and geomorphological data along with optically stimulated luminescence dating, we investigated the relative impact of three direct and indirect anthropogenic causes for the local morphological change and enhanced lateral migration rates: (1) lack of strategies to manage fluvial erosion; (2) a strong increase in the number of farmsteads and related intensified local land use from the High Middle Ages onwards; and (3) (human-induced) drift-sand activity directly adjacent to the river bends, causing a change in bank stability. Combined, these factors led locally to meander amplitudes well beyond the valley sides. Lessons learned at this site are relevant for management and restoration of meandering rivers in similar settings elsewhere, particularly in meeting the need to estimate spatial demands of (restored) low-energy fluvial systems and manage bank erosion.

Funding

RiverCare, supported by the Netherlands Organization for Scientific Research (NWO)

Dutch Foundation of Applied Water Research (STOWA)

Ministry of Economic Affairs under grant number P12-14 (perspective programme)

History

Publisher

4TU.ResearchData

Time coverage

Late Holocene

Geolocation

Overijsselse Vecht, Ommen, the Netherlands

Format

media types: application/pdf

Organizations

Soil Geography and Landscape Group, Wageningen University & Research Cultural Geography Group, Wageningen University & Research Environmental Sciences, Wageningen University & Research Centre for Landscape Studies, University of Groningen Netherlands Centre for Luminescence dating, Wageningen University & Research

Licence

Exports