Abstract

The importance of available fire-fighting water has drawn wide attention since the Hanshin earthquake in January 1995. On the other hand, as part of the flood control measures in Tokyo, many large reservoirs using underground space have been planned and implemented. Under this situation, it is necessary to consider using the reservoirs. Underground reservoir can store water during non-flood seasons, and the water thus kept can be used for eventual fire fighting. In this paper, underground reservoir's multi-objective uses are discussed, by analysing the monthly variations of the past 68 years' rainfall data in Tokyo.

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