Mekong Dam Victims - Thailand. Mrs. Sompong Viengjan (53). As one of the main protesters against the Pak Mun dam she has been arrested many times for her engagement. She is still one of the spokeswomen for the local population with the government. The building of the Pak Mun Dam in Thailand has lead to strong opposition by the local population as the number of fish and fish species in the river is dramatically reduced because of the dam, affecting more than 20,000 people. Known as "The Mother of Waters", more than 60 million people depend on the Mekong river and its tributaries for food, fresh water, transport and other aspects of daily life. The construction of big dams is now threatening the life of these people aswell as the vital and unique ecosystem of the river.