Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Thai Activists Protest New Xayaburi Dam on the Mekong Steve Sandford NONG KHAI, THAILAND - It's been more than 40 years since Bula Tawan first cast his fishing net out across the Mekong River when the waterway was rich in marine life. But the days of big catches have disappeared for most fishermen like Tawan, who once relied on the big hauls to earn a living and feed his family. "The water and the color have changed because when the water was natural it was not clear like this and it would have sediments and nutrients in there," explained the lean 66-year-old father, as he scooped up a handful of transparent river water. "The water is clear, but the sediments and nutrients have gone." .