Interacting land use and soil surface dynamics control groundwater outflow in a montane catchment of the lower Mekong basin

• Published in: Agriculture, ecosystems & environment Vol. 268; pp. 90 - 102
• Main Authors: Ribolzi, Olivier, Lacombe, Guillaume, Pierret, Alain, Robain, Henri, Sounyafong, Phabvilay, de Rouw, Anneke, Soulileuth, Bounsamai, Mouche, Emmanuel, Huon, Sylvain, Silvera, Norbert, Latxachak, Keo Oudone, Sengtaheuanghoung, Oloth, Valentin, Christian
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2018; Elsevier BV; Elsevier
• Subjects: Annual runoff; annuals; Base flow; basins; Bedrock; Biodiversity; Catchments; climate; conservation buffers; Continental interfaces, environment; Control surfaces; Cultivation; Dry season; Ecosystem services; Ecosystems; Electrical conductivity; electrical resistance; Electrical resistivity; Electrical resistivity tomography (ERT); Evapotranspiration; fallow; Flash floods; Flood management; floods; Groundwater; Groundwater discharge; Groundwater levels; Groundwater recharge; Groundwater runoff; hydrograph; Hydrologic connectivity; Hydrologic models; Hydrological modelling; Hydrology; Infiltration; Land use; land use change; Mekong River; Ocean, Atmosphere; Outflow; protective effect; Rain; Rain water; Rainfall; Rainfall-runoff relationships; Reduction; Regrowth; Runoff; Sciences of the Universe; Shifting cultivation; Soil crusting; Soil dynamics; Soil layers; Soil permeability; South East Asia; Storm and inter-storm streamflow; Storms; Stream discharge; Stream flow; streams; temporal variation; time series analysis; tomography; topography; Tracer-based hydrograph separation; Vegetation cover; Water outflow; Water resources; water table; Water uptake; water yield; watersheds; Southeast Asia; South East Asia; Mekong River; Hydrological modelling; Tracer-based hydrograph separation; Electrical resistivity tomography (ERT); Hydrologic connectivity; Storm and inter-storm streamflow

Stream-hillslope connectivity controlled by crop-fallow cycle and soil crust. [Display omitted] •Annual runoff coefficient decrease with fallow regrowth.•Rain infiltration is limited by soil surface crusting under annual crops.•Groundwater outflow during storms increase with soil crusting rate reduc...