序曲一九九一年春夏之间,太湖流域在连续霪雨一个多月之后,又突然遭受两次特大暴雨的袭击.第一次在六月中旬,降雨三百九十三毫米;第二次是七月初,两天之内降雨三百四十五毫米.这样长时间的普降暴雨和极短时间内的特大暴雨,在近百年有水文记录的历史上是空前的.暴雨使河湖水位猛涨,仅在常州市,无情的洪水就吞没了一百六十万亩良田,淹了四千多家企业,冲毁了三万余间房舍,使七十万人围困在洪水之中…… Overture In the spring and summer of 1991, after more than a month of continuous rain, the Taihu Lake valley suddenly suffered two extra-heavy rains. The first rainfall in mid-June was 399 millimeters. The second This is followed by a rainfall of 345 millimeters in two days in early July. Such prolonged heavy rainfall and extremely heavy rainfall in a very short period of time have been unprecedented in the history of hydrological records in the past century. The water level soared. In Changzhou alone, the relentless flood swallowed 1.6 million mu of fertile land, flooded more than 4,000 enterprises, destroyed more than 30,000 premises and left 700,000 people in floods in……