The Chadian embankment collapse occurred at Yidu Reach of Changjiang River during the flood period 1998. The environmental geological conditions of the Yidu Reach are analyzed in the paper.

• 1998年长江特大洪水后期 ,宜都河段茶店岸坡崩岸直接威胁长江大堤安全。 本文分析了长江宜都河段的环境地质条件 ,宜都河段河流地质作用的基本特征。