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Groundwater contribution to streamflow sustains biodiversity and enhances ecosystem services, especially under monsoon-driven climate where stream baseflow is often the only available water resource during the dry season. We assessed how land use change influences streamflow and its groundwater c...


Ribolzi, OlivierLacombe, GuillaumePierret, A.Robain, H.Sounyafong, P.Rouw, Anneke deSoulileuth, B.Mouche, E.Huon, S.Silvera, N.Latxachak, K.O.Sengtaheuanghoung, OlothValentin, C.[Interacting land use and soil surface dynamics control groundwater outflow in a montane catchment of the lower Mekong basin]Interacting land use and soil surface dynamics control groundwater outflow in a montane catchment of the lower Mekong basin

Study region : In this study, 33 catchments across the Lower Mekong Basin in Southeast Asia are examined to detect historical changes in their hydrological response via a model-based methodology. Study focus : Intensive development over the past half century across Southeast Asia’s Lower Mekong B...


Lyon, S.W.King, K.Polpanich, O.Lacombe, Guillaume[Assessing hydrologic changes across the Lower Mekong Basin]Assessing hydrologic changes across the Lower Mekong Basin

In Montane Southeast Asia, deforestation and unsuitable combinations of crops and agricultural practices degrade soils at an unprecedented rate. Typically, smallholder farmers gain income from “available” land by replacing fallow or secondary forest by perennial crops. We aimed to understand how ...


Lacombe, GuillaumeValentin, ChristianSounyafong, P.Rouw, Anneke deSoulileuth, B.Silvera, N.Pierret, A.Sengtaheuanghoung, OlothRibolzi, Olivier[Linking crop structure, throughfall, soil surface conditions, runoff and soil detachment: 10 land uses analyzed in northern Laos]Linking crop structure, throughfall, soil surface conditions, runoff and soil detachment: 10 land uses analyzed in northern Laos

Groundwater recharge remains almost totally unknown across the Mekong River Basin, hindering the evaluation of groundwater potential for irrigation. A regional regression model was developed to map groundwater recharge across the Lower Mekong Basin where agricultural water demand is increasing, e...


Lacombe, GuillaumeDouangsavanh, SomphasithVongphachanh, S.Pavelic, Paul[Regional assessment of groundwater recharge in the lower Mekong Basin]Regional assessment of groundwater recharge in the lower Mekong Basin

The humid tropics are exposed to an unprecedented modernization of agriculture involving rapid and highly-mixed land-use changes with contrasted environmental impacts. Afforestation is often mentioned as an unambiguous solution for restoring ecosystem services and enhancing biodiversity. One cons...


Lacombe, GuillaumeRibolzi, OlivierRouw, Anneke dePierret, AlainLatsachak, K.Silvera, N.Pham Dinh, R.Orange, D.Janeau, Jean L.Soulileuth, B.Robain, H.Taccoen, A.Sengphaathith, P.Mouche, E.Sengtaheuanghoung, OlothTran Duc, T.Valentin, Christian[Afforestation by natural regeneration or by tree planting: examples of opposite hydrological impacts evidenced by long-term field monitoring in the humid tropics]Afforestation by natural regeneration or by tree planting: examples of opposite hydrological impacts evidenced by long-term field monitoring in the humid tropics

The humid tropics are exposed to an unprecedented modernisation of agriculture involving rapid and mixed land-use changes with contrasted environmental impacts. Afforestation is often mentioned as an unambiguous solution for restoring ecosystem services and enhancing biodiversity. One consequence...


Lacombe, GuillaumeRibolzi, OlivierRouw, Anneke dePierret, A.Latsachak, K.Silvera, N.Dinh, R.P.Orange, D.Janeau, Jean L.Soulileuth, B.Robain, H.Taccoen, A.Sengphaathith, P.Mouche, E.Sengtaheuanghoung, OlothTran Duc, T.Valentin, Christian[Contradictory hydrological impacts of afforestation in the humid tropics evidenced by long-term field monitoring and simulation modelling]Contradictory hydrological impacts of afforestation in the humid tropics evidenced by long-term field monitoring and simulation modelling

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 commer...


Ribolzi, OlivierEvrard, O.Huon, S.Rouw, Anneke deSilvera, N.Latsachack, K.O.Soulileuth, B.Lefevre, I.Pierret, A.Lacombe, GuillaumeSengtaheuanghoung, OlothValentin, Christian[From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment]From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment

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