关键词: 洞庭湖平原, 环境演变, 人地关系

Abstract: A continuous record from the Dongtinghu Lake is presented in this work. The authors provide detailed evidence of particle size, magnetic capacity and pollen analysis of ZK01 core that reveals the changes of lake’s environment and climate since 6000 aBP. The study shows that 6000-4000 aBP, the water depth was deep in the area of ZK01 core and subtropical evergreen broad-leaved forest developed around the lake, implying a hot/humid climate; 4000-1000 aBP, the water depth was still deep with decreasing trend in the late period, and the climate became relatively dry and cool, vegetation changed significantly; 1000-600 aBP, the lake shrank to be a shallow lake and further developed to the alternate shoal and lacustrine bog environment after 600 aBP. The results reveal that hydrological environment and climate change evidently affected the process of regional ancient culture and history. Particularly, the changes of hydrological environment and climate maybe were the main fading reason of prehistoric civilization in Dongtinghu area. Since 1000 aBP, human activities such as embankment and reclamation in the banks of Yangtze River affected obviously the evolution history of flow and sediment process and river-lake environment in Dongtinghu region.

Key words: Dongtinghu Plain, environmental change, man-land relationship