Reducing the basin vulnerability by land management practices under past and future climate: a case study of the Nam Ou River Basin, Lao PDR

摘要: This research evaluates different land management practices for the Nam Ou River Basin in Northern Laos reducing vulnerability of basin due to erosion and sediment yield under existing future climate conditions. We use projection data (precipitation temperature) from three general circulation models (GCMs) greenhouse gas emission scenarios (GHGES), namely B1, A1B A2 periods, 2011–2030, 2046–2065 2080–2099. These large resolution GCM are downscaled using Long Ashton Research Station-Weather Generator (LARS-WG). The Soil Water Assessment Tool (SWAT), which is a process based hydrological model, used simulate discharge threshold value annual applied identify vulnerable sub-basins. Results show that change precipitation expected be between −7.60 2.64% −8.98 11.85% 2046–2065, −11.04 25.84% In meantime, changes mean monthly temperature vary 0.3 1.3 °C 2.9 1.9 4.9 Five sub-basins identified (critical) current climate. Our results terracing most effective practice reduce these followed by strip-cropping filter strip. Appropriate significant reduction (i.e. up tolerance limit) except some exceptional sub-basins, designing an optimum combination essential basin.