摘要：

莱州湾南岸平原是指西起小清河口，东至胶莱河口的广大沿岸地区，这一地区近年来是我国工农业发展较快的地区，也是我国地下咸水入侵较为严重的地区。历史上，莱州湾南岸平原地区曾有一些湖泊存在，如巨淀湖、黑冢泊、别画湖，但现在早已荡然无存了。研究这些古湖泊的消亡原因对于恢复该区古地理环境以及确立湖迹区今后的发展方向具有十分重要的意义。本文运用查阅历史文献、地层剖面分析、地名考证、遥感解译等多种方法，对莱州湾南岸古湖泊的消亡原因进行了研究与分析，并指出该区古湖泊消亡的原因是气候变干、河流变迁、人类活动影响等，其中气候变化是古湖泊消亡的根本原因，河流变迁是古湖泊消亡的直接原因，而人类活动则加速了古湖泊消亡的进程。

Abstract:

The south coastal plain of the Laizhou Bay is a wide coastal area which lies between the outlet of the Xiaoqinghe River and that of the Jiaolaihe River. In this area , the industry and agriculture has developed quickly in recent years and the intrusion of underground saline water is very serious. In historic times , there existed three lakes in the south coastal plain of the Laizhou Bay: Judian Lake , Qingshuibo Lake and Biehua Lake. But they have already disappeared. To study the causes of disappearance of these ancient lakes is important to restore the palaeogeographic environments of the south coastal plain of the Laizhou Bay and establish the development direction of the lake-trace areas. Based on the data of the historical geography, the analysis of stratigraphic section, the textual research of the place name and satellite photographic interpretation, the authors studied the cause of disappearance of the ancient lakes in the south coastal plain of the Laizhou Bay, and pointed out that the causes are the drying climate, the migration of river and the activity of human beings. Among the three causes, the drying climate is the fundamental one. The migration of river is the direct cause and the activity of human beings speeds up the process of disappearance of ancient lakes.