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- W2888848982 startingPage "723" @default.
- W2888848982 abstract "Abstract. River channel patterns may alter due to changes in hydrological regime related to changes in climate and/or land cover. Such changes are well documented for transitions between meandering and braiding rivers, whereas channel pattern changes between laterally stable and meandering rivers are poorly documented and understood. We hypothesize that many low-energy meandering rivers had relatively low peak discharges and were laterally stable during most of the Holocene, when climate was relatively stable and human impact was limited. Our objectives in this work are to identify a Late Holocene channel pattern change for the low-energy Overijsselse Vecht river, to develop and apply a novel methodology to reconstruct discharge as a function of time following a stochastic approach, and to relate this channel pattern change to reconstructed hydrological changes. We established that the Overijsselse Vecht was laterally virtually stable throughout the Holocene until the Late Middle Ages, after which large meanders formed at lateral migration rates of about 2 m yr−1. The lateral stability before the Late Middle Ages was constrained using a combination of coring information, ground-penetrating radar (GPR), radiocarbon (14C) dating, and optically stimulated luminescence (OSL) dating. We quantified bankfull palaeodischarge as a function of time based on channel dimensions that were reconstructed from the scroll bar sequence and channel cut-offs using coring information and GPR data, combined with chronological constraints from historical maps and OSL dating. We found that the bankfull discharge was significantly greater during the meandering phase compared to the laterally stable phase. Empirical channel and bar pattern models showed that this increase can explain the channel pattern change. The bankfull discharge increase likely reflects climate changes related to the Little Ice Age and/or land use changes in the catchment, in particular as a result of peat reclamation and exploitation." @default.
- W2888848982 created "2018-09-07" @default.
- W2888848982 creator A5007834278 @default.
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- W2888848982 creator A5038905468 @default.
- W2888848982 creator A5043958212 @default.
- W2888848982 creator A5079283585 @default.
- W2888848982 date "2018-08-31" @default.
- W2888848982 modified "2023-09-30" @default.
- W2888848982 title "Late Holocene channel pattern change from laterally stable to meandering – a palaeohydrological reconstruction" @default.
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- W2888848982 doi "https://doi.org/10.5194/esurf-6-723-2018" @default.
- W2888848982 hasPublicationYear "2018" @default.
- W2888848982 type Work @default.