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一、水情 1999年6月下旬进入梅雨期后,长江流域大部分地区多次发生强降雨过程,各支流洪水频繁发生。长江干流和洞庭湖、鄱阳湖湖区水位大幅上涨,沙市以下各主要水文站自6月30日起相继超过警戒水位。宜昌站最大流量为57600立方米每秒,中下游干流最高水位接近1998年。沙市站最高水位44.74米,超过1954年水位,比1998年最高水位低0.48米;监利站最高水位38.30米,仅比1998年最高水位低0.01米;汉口站最高水位28.89米,居历史第三位;九江、湖口两站最高水位分别为22.43
I. Water conditions After entering the Meiyu period in late June 1999, heavy rainfall occurred frequently in most parts of the Yangtze River basin, and floods of various tributaries frequently occurred. The water levels in the mainstream of the Yangtze River, Dongting Lake and Poyang Lake Region have risen sharply. The major hydrological stations below Shashi City have surpassed the warning water level since June 30. Yichang station maximum flow of 57600 cubic meters per second, the highest level in the middle and lower reaches of the mainstream close to 1998. Shashi Station 44.74 meters above sea level, more than the 1954 water level, 0.48 meters lower than the maximum water level in 1998; the highest water level Jianli station 38.30 meters, only 0.01 meters lower than the highest water level in 1998; Hankou station highest water level of 28.89 meters, ranking third in history ; Jiujiang, Hukou two stations were the highest water level of 22.43