Estimation of House Cleanup Work Volume Based on Disaster Volunteer Center Work Management Data —The Case of the 2015 Joso City—
Yoshinobu Mizui*,**, and Hiroyuki Fujiwara*,**
*National Research Institute for Earthquake and Disaster Resilience (NIED)
3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan
**University of Tsukuba
To understand the workload of house cleanup and related workforce shortage after a disaster, the actual work situation in disaster-stricken areas is accounted for by disaster volunteer work management data created by the Disaster Volunteer Center of Joso City in Ibaraki Prefecture at the time of the Kanto–Tohoku Heavy Rain Disaster in September 2015. Using the classification of inundation depth, judged from ground elevation, the weekly workload of house cleanup according to the work content is recorded to clarify the characteristics of each area. Comparing this with the inundated areas without destructions by water flow, near the bank break with house destructions, in the urban area, and around the farmland along the old road, a model to estimate the workload is constructed. It was observed that indoor work to recommence living in urban areas continued for a long time, while the work was completed in a relatively short time in the area along the old road. The area near the bank break, with a small number of houses, witnessed very few house destructions. Hence, it is not necessary to separately calculate the workload caused by house destructions. The appropriateness of the estimated results was verified by using a method to estimate the workload based on the amount of disaster waste. As a result, the total workload estimated by disaster volunteers and victims for the busy period of two months was a million people. In the case of the Joso City flood, very few houses were completely destroyed, therefore, regular living could be resumed swiftly and people settled there after the disaster due to its proximity to the metropolitan area. Hence, the population decreased by the flood was recovered in two years.
-  M. Suga, “Disaster Relief Volunteers—20 Years After 1.17. and Challenges Ahead,” Urban Housing Sciences, Vol.88, pp. 33-37, 2015 (in Japanese).
-  Y. Honjo and S. Tatsuki, “A Quantitative Verification of Comprehensive Support Power of Inter-Local Government—Assistance During the Great East Japan Earthquake: Case Study of Kobe City Assistance to the Stricken Municipality Governments,” J. of Social Safety Science, Vol.19, pp. 51-60, 2013 (in Japanese).
-  H. Taguchi, T.-Y. Yi, Y. Mizui, H. Sano, and Y. Usuda, “A Suggestion of Geospatial Information and Utilization Method on Disaster Volunteer Centers: Cases in Supporting Activities,” J. of Disaster Information Studies, Vol.14, pp. 116-127, 2016 (in Japanese).
-  Y. Mizui, T. Yi, H. Sano, Q. Cui, and K. Shimazaki, “The Validation of the Information Operational Support Tool at Disaster Volunteer Centers – A Case Study in Joso City –,” Natural Disaster Research Report of the National Research Institute for Earth Science and Disaster Resilience, No.51, pp. 87-92, 2018 (in Japanese).
-  Y. Mizui, M. Ikeda, and T. Yi, “A Survey on the Use of Information in the Operation of Disaster Volunteer Centers – A Case Study During the 2018-2019 Windstorms and Floods –,” Proc. of the 22nd Conf. Japan Society for Disaster Information Studies, pp. 158-159, 2020 (in Japanese).
-  S. Tamura et al., “A Report on the Information Support Activities Using GIS in Volunteer Center of Areas Stricken by the Heavy Rain Event of July 2018: A Case of the Activities in Mihara City,” AIJ J. of Technology and Design, Vol.25, No.61, pp. 1299-1303, 2019 (in Japanese).
-  H. Sekiguchi, M. Takai, Y. Owada, and M. Oguchi, “Disaster Volunteer Challenges and Application Design,” Proc. of Multimedia, Distributed, Cooperative, and Mobile Symp. (DICOMO 2021), pp. 495-500, 2021 (in Japanese).
-  Study Group on Promotion of Volunteer Activities that Contribute to Disaster Prevention at Large Secretariat, “Arrangement of Past Studies in the Cabinet Office,” 2015 (in Japanese). https://www.bousai.go.jp/kaigirep/kentokai/bousai_volunteer/dai1kai/pdf/04kentoseiri.pdf [Accessed June 10, 2022]
-  N. Hirayama, M. Osako, and H. Hayashi, “Development of Quantitative Estimation System for Disaster Debris in the Initial Stage – A Case Study on the 2016 Kumamoto Earthquake Disaster –,” J. of Social Safety Science, No.30, pp. 111-117, 2017 (in Japanese).
-  Joso City, “Verification Report on the 2015 Joso City Kinugawa River Flood Disaster Response—Preparing for Disaster as Our Own—,” 2016 (in Japanese). http://www.city.joso.lg.jp/ikkrwebBrowse/material/files/group/6/kensyou_houkokusyo.pdf [Accessed June 10, 2022]
-  National Research Institute for Earth Science and Disaster Resilience, “Field Survey,” (in Japanese). https://mizu.bosai.go.jp/wiki2/wiki.cgi?page=%BE%EF%C1%ED%BB%D4%A4%CB%A4%AA%A4%B1%A4%EB%BF%BB%BF%E5%BF%BC%CA%AC%C9%DB%C4%B4%BA%BA%A1%CA%CA%BF%C0%AE27%C7%AF9%B7%EE%B4%D8%C5%EC%A1%A6%C5%EC%CB%CC%B9%EB%B1%AB%A1%CB [Accessed June 10, 2022]
-  Joso City Council of Welfare website (in Japanese). http://www.joso-shakyo.jp/ [Accessed June 10, 2022]
-  Cabinet Office, Government of Japan, “Section 2: Damage Caused by Flooding,” Cabinet Office, Government of Japan, “Guidelines on Criteria for Recognizing Damage to Disaster-Related Dwellings,” 2021 (in Japanese). https://www.bousai.go.jp/taisaku/pdf/r303shishin_3.pdf [Accessed June 10, 2022]
-  Q. Cui et al., “Spatial Arrangement of Joso-Shi Disaster Volunteer Center Headquarters Functions,” Natural Disaster Research Report of the National Research Institute for Earth Science and Disaster Resilience, No.51, pp. 109-114, 2018 (in Japanese).
-  Chiba Council of Welfare, “Collection of Forms for Support Activities at the Time of Disaster,” 2013 (in Japanese). http://www.chibakenshakyo.com/04boran/saigaisien_manual/yousiki/yousiki.html [Accessed June 10, 2022]
-  Bureau of Environment, Reclamation and Resource Recycling, Disaster Waste Management Office, Ministry of the Environment, “Guidelines for Disaster Waste Management (Revised Version),” Technical Reference 14-2, 2018.
-  T. Ujihara, H. Wake, and Y. Morinaga, “Changing Population and Land Prices in Areas Damaged by Torrential Rains in Kanto and Tohoku, September 2015,” J. of the City Planning Institute of Japan, Vol.54, No.1, pp. 57-63, 2019 (in Japanese).
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