e government and still associate the rural minorities with the genocide of the 1970s, which began as an agrarian revolution.
"The people here, they feel very isolated. They feel like no one from the outside will come to help them," said Kim Sangha, coordinator of the 3 S Rivers Protection Network (3SPN), an Oxfam America partner.
First the rivers
As the scorching sun sets on the Sesan River, the people of Taveng Lou village get to work. Men take out their fishing boats and pull in their nets. Women fill their watering cans and irrigate their gardens and rice paddies. Families wade into the shallows, bathing and collecting water for household use.
Vietnam's Yali Falls dam disrupts this daily routine. Since it became operational in 2001, the Cambodians living downstream have noticed dramatic changes. Unexpected water surges have eroded the shoreline, depositing silt, sand, and rocks in the deep pools where fish live. And the fluctuating water levels have either swept away nets or left them high and dry.
All in all, villagers here say they've seen a 70 percent drop-off in their fish catch.
"Before, you used to be able to put a pot on the fire, walk down to the river, and catch some fish—all before the water boiled," said Em Vuthy, deputy governor of Taveng District. "Now you can spend a whole day and get one fish."
Beyond reducing the number of fish, the dam has altered the way people farm along the Sesan River. Traditionally, the villagers depended on the overflow of the river to water their plants and rice during the wet season. During the dry season, they would plant different crops that could handle the heat and scarcity of water. But now people like Mean Trosh, a mother of seven who grows cabbage, watercress, pumpkins, red chilies, eggplants, and rice along the water, can't plan around the seasons; the dam creates unexpected floods. Trosh says she tries to plant on higher ground, but even those gardens and rice paddies have been destroyed.
"When the water level changes, it rises quickly and goes down quickly," she said. "Last year, I tried to grow rice along the river, but it was damaged by the floods."
According to the villagers and Oxfam partners, the Yali Falls dam was built with no formal assessment of the environmental and social impacts downstream in Cambodia. And right now, more than a dozen dam projects like it are already in the works along the "3 S Rivers"—the Sesan, Srepok, and Sekong—that flow from the central highlands of Vietnam and southern Laos downstream to the northeast provinces of Cambodia.
Last August, a huge flood along the Srepok River inundated at least 15 villages in Stung Treng and Ratanakiri. More than 650 families were affected. Months later, sitting on the wooden floor of their village pagoda under a cascade of prayer flags, Dae Low villagers shouted over each other as they recalled what happened.
Villagers reported hearing a bulletin on the radio that one of the dams under construction would be releasing water for a few days. But by the time the bulletin aired, the Srepok was already rising. Many of the villagers didn't have access to radios. Those who did, lost time warning family and friends. When they returned home, their chickens, pigs, and water buffalo had drowned. Their vegetables had been washed away. More than 1,300 rice fields were destroyed—an entire year's harvest.
"We are very worried about the future," said the village chief, Prom Phally. "We don't know how to prepare for these floods."
Then the forests
The people of Cambodia's northeast highlands depend primarily on fishing and farming to make a living. But they have always looked to their forests as sacred places. They supplement their income by collecting local plants there and gather herbs for traditional medicines. During the dry season, when the green grass turns to yellow straw, they let their livestock wander into the woods for food and water.
At 67, Seth Gnal makes the three-mile trek to the woods near the Srepok River every three days. Together with family members, he collects tree resin to repair and maintain his f