Planning for Climate Change and Mechanisms for Co-operation in Southeast Asia’s Sesan, Sekong and Srepok Transboundary River Basin

摘要: Southeast Asia’s 3S river basin, which comprises the Sesan, Srepok and Sekong rivers, is an important tributary basin of the Mekong River. The 3S rivers rise in Lao PDR and Vietnam, and flow through Cambodia, where they join before discharging to the Mekong. Vietnam has the highest forest loss and the most (46) dams. Lao PDR retains much of its forest, however, 15 hydropower dams are either being built or licensed for construction in its portion of the Sekong river basin. Cambodia is planning multiple dams on each of the three rivers’ lower reaches. Cambodia’s dams will have the greatest impact on system connectivity and thus the 3S’s important migratory fishery. The flow regime of all three rivers has been altered as dam operations have increased dry season flow and reduced wet season flow. Increased Total Suspended Solids, Nitrate\Nitrite and Total Phosphorous have been observed in the …