The effects of land use and topographic changes on sediment connectivity in mountain catchments

Understanding the evolution of sediment connectivity associated with different land use and topographic changes is a prerequisite for a better understanding of sediment budgets and sediment transport processes. We used the Index of Sediment Connectivity (IC) developed by Cavalli et al. (2013) based...

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Autores: Llena Hernando, Manel, Vericat Querol, Damià, Cavalli, Marco, Crema, Stefano, Smith, Mark William
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/68325
Acceso en línea:https://doi.org/10.1016/j.scitotenv.2018.12.479
http://hdl.handle.net/10459.1/68325
Access Level:acceso abierto
Palabra clave:Sediment connectivity
Land use and topographic changes
Mountain catchments
Afforestation
Terracing
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repository_id_str
dc.title.none.fl_str_mv The effects of land use and topographic changes on sediment connectivity in mountain catchments
title The effects of land use and topographic changes on sediment connectivity in mountain catchments
spellingShingle The effects of land use and topographic changes on sediment connectivity in mountain catchments
Llena Hernando, Manel
Sediment connectivity
Land use and topographic changes
Mountain catchments
Afforestation
Terracing
title_short The effects of land use and topographic changes on sediment connectivity in mountain catchments
title_full The effects of land use and topographic changes on sediment connectivity in mountain catchments
title_fullStr The effects of land use and topographic changes on sediment connectivity in mountain catchments
title_full_unstemmed The effects of land use and topographic changes on sediment connectivity in mountain catchments
title_sort The effects of land use and topographic changes on sediment connectivity in mountain catchments
dc.creator.none.fl_str_mv Llena Hernando, Manel
Vericat Querol, Damià
Cavalli, Marco
Crema, Stefano
Smith, Mark William
author Llena Hernando, Manel
author_facet Llena Hernando, Manel
Vericat Querol, Damià
Cavalli, Marco
Crema, Stefano
Smith, Mark William
author_role author
author2 Vericat Querol, Damià
Cavalli, Marco
Crema, Stefano
Smith, Mark William
author2_role author
author
author
author
dc.subject.none.fl_str_mv Sediment connectivity
Land use and topographic changes
Mountain catchments
Afforestation
Terracing
topic Sediment connectivity
Land use and topographic changes
Mountain catchments
Afforestation
Terracing
description Understanding the evolution of sediment connectivity associated with different land use and topographic changes is a prerequisite for a better understanding of sediment budgets and sediment transport processes. We used the Index of Sediment Connectivity (IC) developed by Cavalli et al. (2013) based on the original approach by Borselli et al. (2008) to study the effects of decadal-scale land use and topographic changes on sediment connectivity in mountain catchments. The input variables of the IC (i.e. land cover and topography) were derived from historical aerial photos using Structure from Motion-Multi View Stereo algorithms (SfM-MVS). The method was applied in different sub-catchments of the Upper River Cinca Catchment (Central Pyrenees), representative of three scenarios: (a) Land cover changes; (b) Topographic changes in agricultural fields (terracing); and (c) Topographic changes associated with infrastructure (road construction). In terms of land cover changes, results show that although connectivity is increased in some areas due to the establishment of new field crops, for most of the study area connectivity decreased due to afforestation caused by rural abandonment. Topographic changes due to the establishment of agricultural terraces affected connectivity to a larger degree than land cover changes. Terracing generally reduced connectivity due to the formation of flat areas in step-slopes, but in certain points, an increase in connectivity caused by the topographic convergence produced by terraces was observed. Finally, topographic changes associated with road construction greatly modified surface flow directions and the drainage network, resulting in changes in connectivity that may affect erosional processes nearby. The methodology used in this paper allows to study the effects of real decadal-scale land use and topographic changes on sediment connectivity and also evaluating and disentangling those changes. Furthermore, this approach can be a useful tool to identify potential risks associated with morphological and land use changes, involving road infrastructures.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.scitotenv.2018.12.479
http://hdl.handle.net/10459.1/68325
http://hdl.handle.net/10459.1/68325
url https://doi.org/10.1016/j.scitotenv.2018.12.479
http://hdl.handle.net/10459.1/68325
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO//CGL2012-36394
info:eu-repo/grantAgreement/MINECO//CGL2016-78874-R
Versió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2018.12.479
Science of the Total Environment, 2019, vol. 660, p. 899-912
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier, 2019
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier, 2019
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
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repository.mail.fl_str_mv
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spelling The effects of land use and topographic changes on sediment connectivity in mountain catchmentsLlena Hernando, ManelVericat Querol, DamiàCavalli, MarcoCrema, StefanoSmith, Mark WilliamSediment connectivityLand use and topographic changesMountain catchmentsAfforestationTerracingUnderstanding the evolution of sediment connectivity associated with different land use and topographic changes is a prerequisite for a better understanding of sediment budgets and sediment transport processes. We used the Index of Sediment Connectivity (IC) developed by Cavalli et al. (2013) based on the original approach by Borselli et al. (2008) to study the effects of decadal-scale land use and topographic changes on sediment connectivity in mountain catchments. The input variables of the IC (i.e. land cover and topography) were derived from historical aerial photos using Structure from Motion-Multi View Stereo algorithms (SfM-MVS). The method was applied in different sub-catchments of the Upper River Cinca Catchment (Central Pyrenees), representative of three scenarios: (a) Land cover changes; (b) Topographic changes in agricultural fields (terracing); and (c) Topographic changes associated with infrastructure (road construction). In terms of land cover changes, results show that although connectivity is increased in some areas due to the establishment of new field crops, for most of the study area connectivity decreased due to afforestation caused by rural abandonment. Topographic changes due to the establishment of agricultural terraces affected connectivity to a larger degree than land cover changes. Terracing generally reduced connectivity due to the formation of flat areas in step-slopes, but in certain points, an increase in connectivity caused by the topographic convergence produced by terraces was observed. Finally, topographic changes associated with road construction greatly modified surface flow directions and the drainage network, resulting in changes in connectivity that may affect erosional processes nearby. The methodology used in this paper allows to study the effects of real decadal-scale land use and topographic changes on sediment connectivity and also evaluating and disentangling those changes. Furthermore, this approach can be a useful tool to identify potential risks associated with morphological and land use changes, involving road infrastructures.This research was carried out within the framework of two research projects funded by the Spanish Ministry of Economy and Competitiveness and the European FEDER funds: MORPHSED (CGL2012-36394) and MORPHPEAK (CGL2016-78874-R). The first author has a grant funded by the Ministry of Education, Culture and Sports, Spain (FPU016/01687). The second author is a Serra Húnter Fellow at the University of Lleida. This manuscript has benefited from the work carried out during a Short Term Scientific Mission funded by the EU Cost Action Connecteur (ES1306: Connecting European Connectivity Research), and all discussions during the different meetings the Working Group 2 and 4 of this Action organised. The first and second authors are part of the Fluvial Dynamics Research Group-RIUS, which is a Consolidated Group recognized by the Generalitat de Catalunya (2017 SGR 459645). We also acknowledge the support of the CERCA Program of the Generalitat de Catalunya.Elsevier202020212019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttps://doi.org/10.1016/j.scitotenv.2018.12.479http://hdl.handle.net/10459.1/68325http://hdl.handle.net/10459.1/68325reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/MINECO//CGL2012-36394info:eu-repo/grantAgreement/MINECO//CGL2016-78874-RVersió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2018.12.479Science of the Total Environment, 2019, vol. 660, p. 899-912cc-by-nc-nd (c) Elsevier, 2019info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:recercat.cat:10459.1/683252026-05-29T05:05:01Z
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