From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment

Abstract Soil erosion supplies large quantities of sediments to rivers of Southeastern Asia. It reduces soil fertility of agro-ecosystems located on hillslopes, and it degrades, downstream, water resource quality and leads to the siltation of reservoirs. An increase in the surface area covered with...

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Autores principales:	Olivier Ribolzi, Olivier Evrard, Sylvain Huon, Anneke de Rouw, Norbert Silvera, Keo Oudone Latsachack, Bounsamai Soulileuth, Irène Lefèvre, Alain Pierret, Guillaume Lacombe, Oloth Sengtaheuanghoung, Christian Valentin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b0d88a107a794c10bbb1da11c020c99e
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spelling	oai:doaj.org-article:b0d88a107a794c10bbb1da11c020c99e2021-12-02T11:40:13ZFrom shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment10.1038/s41598-017-04385-22045-2322https://doaj.org/article/b0d88a107a794c10bbb1da11c020c99e2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04385-2https://doaj.org/toc/2045-2322Abstract Soil erosion supplies large quantities of sediments to rivers of Southeastern Asia. It reduces soil fertility of agro-ecosystems located on hillslopes, and it degrades, downstream, water resource quality and leads to the siltation of reservoirs. An increase in the surface area covered with commercial perennial monocultures such as teak plantations is currently observed at the expanse of traditional slash-and-burn cultivation systems in steep montane environments of these regions. The impacts of land-use change on the hydrological response and sediment yields have been investigated in a representative catchment of Laos monitored for 13 years. After the gradual conversion of rice-based shifting cultivation to teak plantation-based systems, overland flow contribution to stream flow increased from 16 to 31% and sediment yield raised from 98 to 609 Mg km−2. This result is explained by the higher kinetic energy of raindrops falling from the canopy, the virtual absence of understorey vegetation cover to dissipate drop energy and the formation of an impermeable surface crust accelerating the formation and concentration of overland flow. The 25-to-50% lower 137Cs activities measured in soils collected under mature teak plantations compared to soils under other land uses illustrate the severity of soil erosion processes occurring in teak plantations.Olivier RibolziOlivier EvrardSylvain HuonAnneke de RouwNorbert SilveraKeo Oudone LatsachackBounsamai SoulileuthIrène LefèvreAlain PierretGuillaume LacombeOloth SengtaheuanghoungChristian ValentinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Olivier Ribolzi Olivier Evrard Sylvain Huon Anneke de Rouw Norbert Silvera Keo Oudone Latsachack Bounsamai Soulileuth Irène Lefèvre Alain Pierret Guillaume Lacombe Oloth Sengtaheuanghoung Christian Valentin From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
description	Abstract Soil erosion supplies large quantities of sediments to rivers of Southeastern Asia. It reduces soil fertility of agro-ecosystems located on hillslopes, and it degrades, downstream, water resource quality and leads to the siltation of reservoirs. An increase in the surface area covered with commercial perennial monocultures such as teak plantations is currently observed at the expanse of traditional slash-and-burn cultivation systems in steep montane environments of these regions. The impacts of land-use change on the hydrological response and sediment yields have been investigated in a representative catchment of Laos monitored for 13 years. After the gradual conversion of rice-based shifting cultivation to teak plantation-based systems, overland flow contribution to stream flow increased from 16 to 31% and sediment yield raised from 98 to 609 Mg km−2. This result is explained by the higher kinetic energy of raindrops falling from the canopy, the virtual absence of understorey vegetation cover to dissipate drop energy and the formation of an impermeable surface crust accelerating the formation and concentration of overland flow. The 25-to-50% lower 137Cs activities measured in soils collected under mature teak plantations compared to soils under other land uses illustrate the severity of soil erosion processes occurring in teak plantations.
format	article
author	Olivier Ribolzi Olivier Evrard Sylvain Huon Anneke de Rouw Norbert Silvera Keo Oudone Latsachack Bounsamai Soulileuth Irène Lefèvre Alain Pierret Guillaume Lacombe Oloth Sengtaheuanghoung Christian Valentin
author_facet	Olivier Ribolzi Olivier Evrard Sylvain Huon Anneke de Rouw Norbert Silvera Keo Oudone Latsachack Bounsamai Soulileuth Irène Lefèvre Alain Pierret Guillaume Lacombe Oloth Sengtaheuanghoung Christian Valentin
author_sort	Olivier Ribolzi
title	From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
title_short	From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
title_full	From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
title_fullStr	From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
title_full_unstemmed	From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
title_sort	from shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b0d88a107a794c10bbb1da11c020c99e
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From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment

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