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１９９９年６月下旬，乌江流域特别是思南以下流域出现的强降雨过程，导致下游干支流江水猛涨，洪水叠加，形成了乌江下游武隆、彭水的特大洪水。乌江控制站武隆水文站洪峰水位达２０４．６３ｍ，超过１９５５年（２０４．５１ｍ）洪峰水位０．１２ｍ，创自１９５１年武隆水文站建站以来的最高洪水位；彭水水文站也出现了有水文记录以来的最高洪水，洪峰水位达２３８．７９ｍ。对乌江下游９９·６洪水进行了分析，并对洪水水情预报进行了回顾总结。
In late June 1999, the heavy rainfall process in the Wujiang River Basin, especially in the waters below Sinan, led to the rapid rise of floods in the dry river tributaries and floods, resulting in the extraordinary floods of Wulong and Pengshui in the lower Wujiang River. The Wujiang Hydrographic Station flood peak water level reached 204.63m, exceeding 1955 (204.51m) peak water level 0.12m, the highest since 1951, Wulong Hydrographic Station since the establishment of the highest flood level; Pengshui hydrological station also appeared The highest flood since the hydrological record, the crest water level reached 238.79m. An analysis of the 99.6 floods in the lower reaches of the Wujiang River was made and the flood forecast was reviewed.