以乌东德水电工程坝址区300个实测数据为依据，辅以数值回归分析，对乌东德坝址河谷应力场分布规律进行了研究。研究结果显示乌东德河谷断面可划分为应力释放区、过渡区和应力方向稳定区;应力方向稳定区最大水平主应力方向与近坝断层和区域控制性断裂接近，与近场区地震构造应力场不同。通过对比乌东德坝址河谷和对称河谷应力场分布特点，发现乌东德坝址河谷具有河床和坡脚高应力区、岸坡岩体呈“驼峰”应力分布等对称河谷应力分布特点。受乌东德河谷形态影响，河床和坡脚高应力区呈现非对称性，山体高耸岸坡侧高应力区分布范围较广;两岸岩体“驼峰”应力曲线“尾部”未稳定。

With the 300 measured data obtained from dam site area in Wudongde Hydropower Station Project, supplemented by numerical regression analysis, the geostress distribution of the area was summarized. The results show that the valley section can be divided into stress-release, stress-transition and stress-direction stable zone, and the maximum horizontal principal stress direction in stress-direction stable zone is relatively close to controlling fracture fault near the dam area, which is different from seismic geostress field in near field region. By comparing geostress distribution of Wudongde dam area valley with symmetrical valley, we can find that the dam area valley has similar stress distribution of symmetrical valleys including the high-stress zone of riverbed and the toe area ,and hump-shaped stress distribution characteristics of rock mass near valley slope. Affected by the morphology of Wudongde valley, the high-stress zone of riverbed and the toe area show a symmetry feature, and the high-stress zone is widely distributed on higher side of the mountain slope. At the same time, the tail of the hump-shaped stress curves of the rock mass by the valley is not stable.