The Mekong River rises in a mountainous area of China and flows for 4,909 km through Myanmar, Thailand, Laos, Cambodia and Vietnam. Its catchment area is 795,000 km2.
As part of a project examining the impact of climate change on rural roads in Cambodia and ways of climate proofing them it was necessary to study the Mekong River through Cambodia. An important objective was to quantify changes in flooding due to climate change.Results
Daily rainfall and climate data were obtained, mainly from web sites of international sources, for the whole of the Mekong basin. They covered the period 1975 to 2011.
The HYSIM rainfall runoff model was calibrated to the following sites:
- Chiang Saen
- Chiang Khan
- Stung Treng
- Kampong Cham
The observed climate data were adjusted using projections from the ECHAM5 climate model and the A1B scenario for the period 2032 to 2068, centred on 2050.
Flows for the two periods were compared which suggested that for this model/scenario combination peak flows would increase.