Modelling long-term alluvial-peatland dynamics in temperate river floodplains

<p>Peat growth is a frequent phenomenon in European river valleys. The presence of peat in the floodplain stratigraphy makes them hotspots of carbon storage. The long-term dynamics of alluvial peatlands are complex due to interactions between the peat and the local river network, and as a resu...

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Autores principales:	W. Swinnen, N. Broothaerts, G. Verstraeten
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/b47ec4b0c15a4250bc14c27d4b51179d
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spelling	oai:doaj.org-article:b47ec4b0c15a4250bc14c27d4b51179d2021-12-01T10:40:23ZModelling long-term alluvial-peatland dynamics in temperate river floodplains10.5194/bg-18-6181-20211726-41701726-4189https://doaj.org/article/b47ec4b0c15a4250bc14c27d4b51179d2021-12-01T00:00:00Zhttps://bg.copernicus.org/articles/18/6181/2021/bg-18-6181-2021.pdfhttps://doaj.org/toc/1726-4170https://doaj.org/toc/1726-4189<p>Peat growth is a frequent phenomenon in European river valleys. The presence of peat in the floodplain stratigraphy makes them hotspots of carbon storage. The long-term dynamics of alluvial peatlands are complex due to interactions between the peat and the local river network, and as a result, alluvial-peatland development in relation to both regional and local conditions is not well understood. In this study, a new modelling framework is presented to simulate long-term peatland development in river floodplains by coupling a river basin hydrology model (STREAM – Spatial Tools for River basins and Environment and Analysis of Management options) with a local peat growth model (modified version of DigiBog). The model is applied to two lowland rivers in northern Belgium, located in the European loess (Dijle (Dyle) River) and sand (Grote Nete River) belts. Parameter sensitivity analysis and scenario analysis are used to study the relative importance of internal processes and environmental conditions on peatland development. The simulation results demonstrate that the peat thickness is largely determined by the spacing and mobility of the local river channel(s) rather than by channel characteristics or peat properties. In contrast, changes in regional conditions such as climate and land cover across the upstream river basin have been shown to influence the river hydrograph but have a limited effect on peat growth. These results demonstrate that alluvial-peatland development is strongly determined by the geomorphic boundary conditions set by the river network and as such models must account for river channel dynamics to adequately simulate peatland development trajectories in valley environments.</p>W. SwinnenW. SwinnenN. BroothaertsG. VerstraetenCopernicus PublicationsarticleEcologyQH540-549.5LifeQH501-531GeologyQE1-996.5ENBiogeosciences, Vol 18, Pp 6181-6212 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5
spellingShingle	Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 W. Swinnen W. Swinnen N. Broothaerts G. Verstraeten Modelling long-term alluvial-peatland dynamics in temperate river floodplains
description	<p>Peat growth is a frequent phenomenon in European river valleys. The presence of peat in the floodplain stratigraphy makes them hotspots of carbon storage. The long-term dynamics of alluvial peatlands are complex due to interactions between the peat and the local river network, and as a result, alluvial-peatland development in relation to both regional and local conditions is not well understood. In this study, a new modelling framework is presented to simulate long-term peatland development in river floodplains by coupling a river basin hydrology model (STREAM – Spatial Tools for River basins and Environment and Analysis of Management options) with a local peat growth model (modified version of DigiBog). The model is applied to two lowland rivers in northern Belgium, located in the European loess (Dijle (Dyle) River) and sand (Grote Nete River) belts. Parameter sensitivity analysis and scenario analysis are used to study the relative importance of internal processes and environmental conditions on peatland development. The simulation results demonstrate that the peat thickness is largely determined by the spacing and mobility of the local river channel(s) rather than by channel characteristics or peat properties. In contrast, changes in regional conditions such as climate and land cover across the upstream river basin have been shown to influence the river hydrograph but have a limited effect on peat growth. These results demonstrate that alluvial-peatland development is strongly determined by the geomorphic boundary conditions set by the river network and as such models must account for river channel dynamics to adequately simulate peatland development trajectories in valley environments.</p>
format	article
author	W. Swinnen W. Swinnen N. Broothaerts G. Verstraeten
author_facet	W. Swinnen W. Swinnen N. Broothaerts G. Verstraeten
author_sort	W. Swinnen
title	Modelling long-term alluvial-peatland dynamics in temperate river floodplains
title_short	Modelling long-term alluvial-peatland dynamics in temperate river floodplains
title_full	Modelling long-term alluvial-peatland dynamics in temperate river floodplains
title_fullStr	Modelling long-term alluvial-peatland dynamics in temperate river floodplains
title_full_unstemmed	Modelling long-term alluvial-peatland dynamics in temperate river floodplains
title_sort	modelling long-term alluvial-peatland dynamics in temperate river floodplains
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/b47ec4b0c15a4250bc14c27d4b51179d
work_keys_str_mv	AT wswinnen modellinglongtermalluvialpeatlanddynamicsintemperateriverfloodplains AT wswinnen modellinglongtermalluvialpeatlanddynamicsintemperateriverfloodplains AT nbroothaerts modellinglongtermalluvialpeatlanddynamicsintemperateriverfloodplains AT gverstraeten modellinglongtermalluvialpeatlanddynamicsintemperateriverfloodplains
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Modelling long-term alluvial-peatland dynamics in temperate river floodplains

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