JDR Vol.16 No.3 pp. 403-409
doi: 10.20965/jdr.2021.p0403

Survey Report:

Demonstration of Stormwater Management Technology by Short-Term Rainfall Prediction and Real-Time Runoff Analysis System Using Small X-Band Radar

Ryo Matsuoka and Shinichiro Oki

Metawater Co., Ltd.
JR Kanda Manseibashi Building, 1-25 Kandasuda-cho, Chiyoda-ku, Tokyo 101-0041, Japan

Corresponding author

October 1, 2020
February 27, 2021
April 1, 2021
stormwater management, flood-damage mitigation, X-band dual polarization radar, drainage pump control, resident’s self-help and mutual assistance

We developed a system that combines urban area rainfall radar (small X-band, dual-polarization radar), short-term rainfall prediction model, and real-time runoff analysis technology, and the demonstration study was conducted on the drainage districts in Fukui City and Toyama City. We demonstrated the effectiveness of the flood damage, by providing the real-time information on rainfall prediction, water level in sewerage pipes, and inland flood prediction to the operators of drainage pump of stormwater storage pipes, and residents in flood-prone areas. During the study for about two years, it was confirmed that the accuracy of the radar rainfall observation was comparable to that of the X-band dual-polarization Doppler weather radar managed by the Ministry of Land, Infrastructure, Transport and Tourism. In the operation of the drainage pump for the Tsukimiminori Stormwater Storage Pipe in Fukui City, we were able to secure the storage capacity for the next rainfall based on the forecast information by maximizing the drainage capacity of the discharge destination. In addition, it was also confirmed that the residents themselves could secure the lead time for setting up water-stop sandbags and moving their vehicles to higher ground.

Cite this article as:
R. Matsuoka and S. Oki, “Demonstration of Stormwater Management Technology by Short-Term Rainfall Prediction and Real-Time Runoff Analysis System Using Small X-Band Radar,” J. Disaster Res., Vol.16 No.3, pp. 403-409, 2021.
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