西湖从原来的海湾泻湖脱胎而来,到现在已经有数千年的历史。作为一个湖泊,它要逐步走向淤塞、变浅、缩小,以至最终消亡,这似是已被许多著名湖泊的衰亡史所证明的自然规律。翻开历史的记载,我们就可以看到,长江流域的云梦大泽,秦汉时茫茫无边,浩浩荡荡,到现在,它遗留下来的洞庭湖,却是一个越来越小的湖泊。还有西汉时期“广三百里”的罗布泊,现在已经滴水不见,成为中国西北地区最干旱、最荒凉的地方之一。世界第二低点、中国的最低处——新疆艾丁湖,唐 West Lake was born from the original Gulf Lagoon, and now has thousands of years of history. As a lake, it gradually becomes silted, shallowed, narrowed, and eventually dies out. This seems to have been proved by the natural laws of the decline of many famous lakes. Open history records, we can see, the Yangtze River Valley Yunmeng Dazawa, Qin and Han boundless boundless, mighty, and now, it left behind the Dongting Lake, but it is a smaller and smaller lakes. There are also Lop Nur in the Western Han Dynasty where the “three hundred miles wide” is missing, and now it has become one of the driest and wildest places in northwestern China. The second lows in the world, China’s lowest point - Aidin, Xinjiang, Tang