Dararat Khamchiangta creator Perera, L.A.S. Ranjith Chairperson Sajor, Edsel E. Examination Committee Shrestha, Rajendra Prasad Examination Committee Royal Thai Government (RTG) Scholarship donor text series technical report th Pathum Thani, Thailand Asian Institute of Technology 2011 continuing eng 91 leaves : ill. Tourism sector development in the Greater Mekong Sub-region (GMS) put enormous pressure on local ecosystems where rapid growth of tourism activities have taken place. Local authorities that should play the role of enabler and regulator do not know how to deal with the rapid pace of tourism development and its impacts. Therefore, this study aims to examine how local authorities in some ecologically sensitive destinations in OMS are dealing with tourism. The research employed a multiple case study approach. Some river based, eco- tourism destinations in the middle part of the Mekong river basin, viz., Vang Vieng in Lao, and Pai in Thailand were studied first to understand the factors that affect the ecological sensitivity of a tourism destination. These factors were used to analyze the trend of tomism growth in the newly emerging destination, Chiang Khan, in Loei province of Thailand. The study finds that Chiang Khan is experiencing even more rapid tourism growth compared to Vang Vieng and Pai. It also finds that the local authority in Chiang Khan is not effective in managing the changes and development in the eco-system. The study proposes some environmental management measures (EMMs) based on the findings from all three cases. A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science in Urban Envirortmental Management, School of Environment Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 2011 Tourism Mekong River Region Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B11418 http://203.159.5.9/ait-thesis/detail.php?q=B11418 130116 20260818094443.0