Abstract
Ever since the river Hwang started to flow on the bed of the Hwai River, flood-disasters in the basin of the Hwai, especially in the lower reaches of the river stretching over the Kiang-Su and the An-Hwei Province, had become all the more violent.
Besides, frequent break down of the banks of the Hwang and the resultant change in the river's flowing direction caused diverse districts in the Hwai basin to be damaged by flood.
This change in a site of the flood-disaster is studied in this paper by dividing the Min and the Chin dynasty, i. e., 544 years, into 27 periods and investigating principal flooded areas in each period of 20 years.
