1989 Volume 33 Pages 181-186
Hydrologic maps are presented, which are used to estimate values of the parameters in the expressions of efficiency of urban storage facilities to control flood, water supply and quality. The expressions have been derived by the authors. AMeDAS, the automated meteorological data acquisition system of the Japanese meteorological agency, supplies hourly rainfall data at more than 1300 observatories deployed all over the Japanese islands, and enables to calculate the parameters. Examples to explain how to use the maps are also presented.