Fig. 2

Rainfall maps: a, outlines of Uda, Masuda, and Ohtaki map; b, raining period in a large sale; c, rainfall in the central area of Hiroshima-City; and d, estimated volumes of rain in the central area. Degrees of rain were determined by the rain duration as follows: heavy, ≥1 h; middle, < 1 h – ≥30 min; and light, < 30 min (c). The original maps are colorless, but are colored here for ease of understanding