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Map of Areas with Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System (Maximum Assumed Rainfall)

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Map of Areas with Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System (Maximum Assumed Rainfall) Map of Areas With Risk of Flooding Due to Overflow of the Kanda, Zenpukuji, and Myoshoji Rivers of the Arakawa River System (maximum assumed rainfall) 1. About this map 2. Basic information (1) Pursuant to the provisions of the Flood Control Act, this map shows the areas expected to flood and anticipated depth of inundation when the maximum assumed (1) Map created by the Tokyo Metropolitan Government rainfall occurs, for sections subject to flood warnings and those subject to water-level notification of the Kanda, Zenpukuji, and Myoshoji rivers of the Arakawa Location map River system. (2) Risk areas designated on March 30, 2018 (2) This river flood risk map uses a simulation to show inundation that can occur due to overflow of the Kanda, Zenpukuji, and Myoshoji rivers resulting from the (3) Released as TMG announcement No.449 maximum assumed rainfall. The simulation is based on the situation of the river channels and flood control facilities as of the time they were designated as areas expected to flood. (4) Designation made based on Article 14, paragraph 1 of the Flood Control Act (Act No.193 of 1949) (3) Because the simulation does not take into account flooding of tributaries or flooding caused by rainfall greater than the assumed level, by a storm surge, or by Sumida River runoff of rainwater, inundation may occur in areas other than those designated in this river flood risk map and the depths of flood water may differ from the (5) River subject to flood warnings covered by this map Ekoda River estimates. Kanda River of the Arakawa River system (The flood warning section is shown in the Myoshoji River Kanda River table below.) Zenpukuji River (4) This river flood risk map only takes into account overflow of the Kanda, Zenpukuji, and Myoshoji rivers. For the areas of inundation that also take into account Nihombashi River flooding of tributaries and surface water flooding (inundation caused by runoff of rainwater), please refer to the Flood Risk Map for the Kanda River Basin. (6) Rivers subject to water-level notification covered by this map Kanda River . Zenpukuji River of the Arakawa River system (The water-level notification section is shown in the table below.) Myoshoji River of the Arakawa River system (The water-level notification section is shown in the table below.) (7) Assumed rainfall Up to 153mm per hour and 690mm in 24 hours in the Kanda River basin [Relevant wards and cities] Chiyoda-ku, Chuo-ku, Shinjuku-ku, 0 5 10km [Inquiries] Bunkyo-ku, Taito-ku, Shibuya-ku, Disaster Prevention Section, River Division, Bureau of Construction, Tokyo Nakano-ku, Suginami-ku, Toshima-ku, Metropolitan Government Musashino City, Mitaka City Main Phone: 03-5321-1111 Legend Expected inundation depth 0.1m - 0.5m 0.5m - 1m 1m - 3m 3m - 5m 5m - 10m Area with risk of flooding due to river overflow River subject to flood warnings and rivers subject to water-level notification covered by this map River Flood warning section / Water-level notification section From near 3-chome 322 Inokashira, Mitaka City Left bank To the confluence point with the Sumida River Kanda River (River subject to flood warnings) From near 3-chome 322 Inokashira, Mitaka City Right bank To the confluence point with the Sumida River From Zenpukuji 2-chome, Suginami-ku (upper end) Left bank To Wada 1-chome, Suginami-ku Zenpukuji River (confluence point with the Kanda River) (River subject to water-level notification) From Zenpukuji 2-chome, Suginami-ku (upper end) Right bank To Wada 1-chome, Suginami-ku (confluence point with the Kanda River) ® From Shimizu 3-chome, Suginami-ku (upper end) Left bank To Shimo-ochiai 1-chome, Shinjuku-ku Myoshoji River (confluence point with the Kanda River) (River subject to water-level notification) From Shimizu 3-chome, Suginami-ku (upper end) Basin boundary Right bank 500 0 500 1000 1500 2000 2500 m To Shimo-ochiai 1-chome, Shinjuku-ku (confluence point with the Kanda River) Administrative boundary This map was created using a 1:2500 topographic map of Tokyo. (Approval number) 29-toshikikou-464.
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