敦煌大泉河的河床演变及其对莫高窟崖体的影响  

Channel Bed Evolution of The Daquan River and Its Impact on Cliff Face of Mogao Grottoes

作　　者：姚鲁烽[1] 彭金章[2] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]敦煌研究院考古研究所,甘肃敦煌736200

出　　处：《敦煌研究》2007年第5期87-92,共6页Dunhuang Research

摘　　要：通过对莫高窟崖体砾石层的成因分析,分别阐述了大泉河河流阶地的分布与河床演变、大泉河洪水对莫高窟崖体的破坏以及莫高窟崖顶坡地雨水汇流对崖壁上层和中层的侵蚀。结论认为正是大泉河洪水与大气降水对莫高窟崖壁上下夹击,造成了莫高窟崖壁上所开凿洞窟的坍塌。根据这些遭到破坏的洞窟残迹推测,莫高窟南区部分崖壁下层、中层、上层均受到不同程度的水侵蚀,而莫高窟北区崖壁的水侵蚀更甚。Through analyzing the formation for gravel layers of the cliff walls of Mogao Grottoes,this paper examines the distribution of terraces of the Daquan River and the evolution of the river bed.Then it expounds the damage of the cliff walls caused by the Daquan floods as well as water erosion to the upper and middle layers by rainfall concentration from top slope lands.Results show that it is the Daquan floods and precipitation that have led to the collapse of the caverns excavated into the cliff walls of Mogao Grottoes.It is inferred from the cavern relics that the upper,middle and lower layers of some cliff walls in the southern area have suffered from water erosion to varying degrees,while the water erosion to the cliff walls is even more serious in the northern area of Mogao Grottoes.

关 键 词：莫高窟 大泉河 崖壁 水侵蚀 

分 类 号：K879.2[历史地理—考古学及博物馆学]