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

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 commercia...

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Autores principales: Ribolzi, Olivier, Evrard, Olivier, Huon, Sylvain, de Rouw, Anneke, Silvera, Norbert, Latsachack, Keo Oudone, Soulileuth, Bounsamai, Lefèvre, Irène, Pierret, Alain, Lacombe, Guillaume, Sengtaheuanghoung, Oloth, Valentin, Christian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5479865/
https://www.ncbi.nlm.nih.gov/pubmed/28638092
http://dx.doi.org/10.1038/s41598-017-04385-2
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author Ribolzi, Olivier
Evrard, Olivier
Huon, Sylvain
de Rouw, Anneke
Silvera, Norbert
Latsachack, Keo Oudone
Soulileuth, Bounsamai
Lefèvre, Irène
Pierret, Alain
Lacombe, Guillaume
Sengtaheuanghoung, Oloth
Valentin, Christian
author_facet Ribolzi, Olivier
Evrard, Olivier
Huon, Sylvain
de Rouw, Anneke
Silvera, Norbert
Latsachack, Keo Oudone
Soulileuth, Bounsamai
Lefèvre, Irène
Pierret, Alain
Lacombe, Guillaume
Sengtaheuanghoung, Oloth
Valentin, Christian
author_sort Ribolzi, Olivier
collection PubMed
description 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 (137)Cs 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.
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spelling pubmed-54798652017-06-23 From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment Ribolzi, Olivier Evrard, Olivier Huon, Sylvain de Rouw, Anneke Silvera, Norbert Latsachack, Keo Oudone Soulileuth, Bounsamai Lefèvre, Irène Pierret, Alain Lacombe, Guillaume Sengtaheuanghoung, Oloth Valentin, Christian Sci Rep Article 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 (137)Cs 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. Nature Publishing Group UK 2017-06-21 /pmc/articles/PMC5479865/ /pubmed/28638092 http://dx.doi.org/10.1038/s41598-017-04385-2 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ribolzi, Olivier
Evrard, Olivier
Huon, Sylvain
de Rouw, Anneke
Silvera, Norbert
Latsachack, Keo Oudone
Soulileuth, Bounsamai
Lefèvre, Irène
Pierret, Alain
Lacombe, Guillaume
Sengtaheuanghoung, Oloth
Valentin, Christian
From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment
title 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_short 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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5479865/
https://www.ncbi.nlm.nih.gov/pubmed/28638092
http://dx.doi.org/10.1038/s41598-017-04385-2
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