雅砻江二滩水电站库区泥石流

雅砻江二滩水电站库区泥石流十分活跃，在库区内，沟谷型泥石流沟１００条．库首左岸的金龙沟，多次暴发过泥石流，用金龙沟泥石流活动特征与短历时雨强的资料，经计算分析后，得到了库区泥石流活动规律、流域环境条件与雨强之间的关系式，并给出了金龙沟暴发泥石流的降水指数３６００，有助于泥右流预报．

DEBRIS FLOW AT THE ERTAN RESERVIOR AREAALONG YALONGJIANG RIVER

At the Ertan Reservior Area along Yalongjang River, debris flows are quite active. Thegully debris flows from dam site to Jinhe in the reservior area is 67 %. Jinlong Ravine ,located onthe left bank of Yalonsjians River and near the lower reaehes of the resesvior area ever broke outdebris flows many tunes. Based on the different environment conditions in reservior area and thedevelopment degree of debris flows ,the 5 activity regions of debris flows can be divided : the moststrong-active region , the strong-active region , the active region , the slight-active resion and themost slight-active region.By computering and analysing the relative data between debris flows and the short durationrainfall, some relative formulae of debris flow activity regularity with the environment factorsalong the Jinlong Ravine and rainfall intensity were set up,as well as a precipitation coefficient( 3 600) of debris flow cccurrence in the ravine has been obtained. Conseguentiy, based on thedata of the meteorolosic report at Ertan Reservior area, the occurrence of debris flow may bepredicted.