Analysis on flood encounter of Jinsha river and Minjiang river

Jinsha river is the upper stretch of the Yangtze, while the Minjiang river is a tributary on the left bank of the upper Yangtze. The two rivers converge at Hejiangmen of Yibin city, Shichuan province. Taking advantage of historical flood investigation data and the measured data from 1991～1998 of Pingshan hydrologic station on Jinsha river, Gaoyang hydrologic station on Minjiang river, and Lizhuang hydrologic station located 15 km downstream the confluence of the two rivers, through statistical computation of the annual maximum flood peak, the definite time interval flood volume, the flood encounter and composition of two rivers are analysed. The analysis results provide design basis for the flood control of Yibin city as well as its lower stretch.