(1) the low-fow water level at the same discharge decreased, and the lowest water level increased due to dry-season reservoir discharge; (2) the decline of the low-fow water level below the dam was less than the undercutting value of the fow channel of the river; (3) the food level at the same discharge below the dam wasslightlyelevated, although peak water levels decreased; (4) food characteristics changed from a high discharge–high food level to a medium discharge – high food level; and (5) an expected decline in the food level downstream was not observed.