雅鲁藏布江下游阶地特征及其工程意义

Terracefeature of the downstream region of YarluZangbu river and its engineering signicance

雅鲁藏布江下游出露有T1和T2阶地剖面,均为基座阶地。简要介绍了出露阶地的组分及沉积特征,并根据墨脱县境内阶地的时代获得了雅鲁藏布江下游区域的下切速率,结合区域所受气候及地貌形态,评价了区域地壳稳定性,并对场地的建设适宜性进行了分析。

T1 and T2 terrace are developed sporadically along the Yarlu Zangbu River,both of them are base terrace and no higher terraces found. The composition and sedimentary of the exposed terraces is briefly introduced,and the cutting rate of the downstream of the Yarlung Zangbo River is obtained according to the era of the terraces in Medog county. Combined with the climate and landform morphology of the area,the regional crustal stability and the suitability of construction of the site are analyzed.