Multi-Scale Environmental Changes
Global awareness of climate change has resulted in enhanced awareness of the fragility of natural systems and a new longer-term perspective for national and regional planning, which presents an opportunity to radically rethink approaches for agricultural production and watershed management.
The saturation of plains and deltas of Southeast Asia induce more and more pressure on mid-land.
What are the effects of land use changes in situ and downstream, on the different erosion processes (splash, sheet, gully, tillage, landslides), on the quality of soil (C org ., structure, depth, ...), on the partition runoff/infiltration, on the paths of water, recharge, flooding, water quality (physical, chemical and bacteriological), biodiversity (weeding, soil macrofauna) and rooting?
A long-term multi-scale monitoring has been established since 1998 along a rainfall gradient and a trajectory of agricultural systems, from the slash-and-burn in Laos without inputs to intensive mechanized cropping system in Thailand, through manual cultivation of cassava then Acacia mangium plantation in Vietnam.
Impacts monitoring of land use changes on water and sediment transfers, soil and water quality
Experiments at different scales of forcing variables (agricultural practices, rainfall simulation) on hydrological processes and erosion
The development of hydrological and erosion models,
The training or consolidating of national scientific communities in hydrology and small watersheds erosion
The supervision and training of students
Recommendations for the governments of these three countries.