Human settlement and its influencing factors during the historicalperiod in an oasis-desert transition zone of Dunhuang, Hexi Corridor,northwest China

Haiming Li1, Guanghui Dong2 and Shanjia Zhang1, (1)Lanzhou University, College of Earth Environmental Sciences, Lanzhou, China, (2)Lanzhou University, MOE Key Laboratory of Western China's Environmental Systems, College of Earth Environmental Sciences, Lanzhou, China