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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

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

Trends in rainfall series were investigated at 16 stations in Ghana over the period 1960-2005. Time series were first de-correlated using an effective pre-whitening methodology and then submitted to the resampling-based Mann-Kendall test. Field significances were assessed using the regional avera...


Lacombe, GuillaumeMcCartney, Matthew P.Forkuor, Gerald[Drying climate in Ghana over the period 1960-2005: evidence from the resampling-based Mann-Kendall test at local and regional levels.]Drying climate in Ghana over the period 1960-2005: evidence from the resampling-based Mann-Kendall test at local and regional levels.

This study focuses on Laos, a landlocked nation located in South-East Asia with sub-tropical climate and highly seasonal rainfall distribution. Laos is one of the world’s least developed countries, and currently witnesses an unprecedented level of development that is highly reliant on its natural...


Viossanges, MathieuPavelic, PaulRebelo, Lisa-MariaLacombe, GuillaumeSotoukee, Touleelor[Regional mapping of groundwater resources in data-scarce regions: the case of Laos]Regional mapping of groundwater resources in data-scarce regions: the case of Laos

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