| 古气候与环境演变 |
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| Surface Water Environment Change of the Mu Us Desert During Historic Times: an Ancient-city Perspective |
| HE Tong-hui1,2, WANG Nai-ang1, HUANG Yin-zhou1, CHENG Hong-yi1 |
| 1.College of Earth & Environmental Sciences, Lanzhou University, Lanzhou 730000, China; 2.Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in North-western China under Ministry of Education, Ningxia University, Yinchuan 750021, China |
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Abstract Previous studies have shown that ruins of ancient city are ideal objects in reflecting intensity of human activities, population fluctuation and environmental change in historical times. Most of ancient cities in Mu Us Desert were built for military, politics and migration. Therefore, location of these cities was limited by water supply, geomorphology, land capacity and so on. It explained the distribution model of these cities. Through investigation into these ruins, we noticed that surface water in Mu Us Desert showed a trend of desiccation in historical times, which would contribute to the understanding of the abandonment of ancient cities. A great many of lakes were totally desiccated, and some shrank; nearly all rivers' flux decreased; some springs disappeared, and so on. However, it was noted that some new lakes appeared and thus local environment rehabilitated with the impact of lake level at the same time. For example, the appearance of Hongjian Nur in 1928 improved surface water environment of Zhongji. To sum up, the surface water environment change during the past two millennia is highly related to climate changes. Water environment started to be affected severely by human since the end of Qing Dynasty, with a increase of intensity of human activities.
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Received: 21 October 2008
Published: 20 May 2010
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2010, Vol. 30 
