TodaCityHazardBook_e
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Kawaguchi CitySakura-kuMinami-kuKita WardAsaka CityWako CityShiki CityNishi-kuWarabi CityChuo-kuItabashi WardUrawa-kuMidori-kuMinuma-kuIwatsuki-kuToda CityToda CityMusashino lineTohoku/Joetsu Shinkansen lineTohoku Main lineKeihin-Tohoku lineIkebukuro Line (Route5)Metropolitan ExpresswaySaitama Omiya Route, Metroporitan ExpresswayKawaguchi line Metroporitan ExpresswayTokyo-Gaikan ExpresswayArakawa RiverKamogawa RiverShin-Shibakawa RiverShibakawa RiverKounumagawa RiverShibakawa RiverKawaguchi CitySakura-kuMinami-kuKita WardAsaka CityWako CityShiki CityNishi-kuWarabi CityChuo-kuItabashi WardUrawa-kuMidori-kuMinuma-kuIwatsuki-kuToda CityToda CityMusashino lineTohoku/Joetsu Shinkansen lineTohoku Main lineKeihin-Tohoku lineIkebukuro Line (Route5)Metropolitan ExpresswaySaitama Omiya Route, Metroporitan ExpresswayKawaguchi line Metroporitan ExpresswayTokyo-Gaikan ExpresswayArakawa RiverKamogawa RiverShin-Shibakawa RiverShibakawa RiverKounumagawa RiverShibakawa RiverKawaguchi CitySakura-kuMinami-kuKita WardAsaka CityWako CityShiki CityNishi-kuWarabi CityChuo-kuItabashi WardUrawa-kuMidori-kuMinuma-kuIwatsuki-kuToda CityToda CityMusashino lineTohoku/Joetsu Shinkansen lineTohoku Main lineKeihin-Tohoku lineIkebukuro Line (Route5)Metropolitan ExpresswaySaitama Omiya Route, Metroporitan ExpresswayKawaguchi line Metroporitan ExpresswayTokyo-Gaikan ExpresswayArakawa RiverKamogawa RiverShin-Shibakawa RiverShibakawa RiverKounumagawa RiverShibakawa RiverKawaguchi CitySakura-kuMinami-kuKita WardAsaka CityWako CityShiki CityNishi-kuWarabi CityChuo-kuItabashi WardUrawa-kuMidori-kuMinuma-kuIwatsuki-kuToda CityToda CityMusashino lineTohoku/Joetsu Shinkansen lineTohoku Main lineKeihin-Tohoku lineIkebukuro Line (Route5)Metropolitan ExpresswaySaitama Omiya Route, Metroporitan ExpresswayKawaguchi line Metroporitan ExpresswayTokyo-Gaikan ExpresswayArakawa RiverKamogawa RiverShin-Shibakawa RiverShibakawa RiverKounumagawa RiverShibakawa RiverKawaguchi CitySakura-kuMinami-kuKita WardAsaka CityWako CityShiki CityNishi-kuWarabi CityChuo-kuItabashi WardUrawa-kuMidori-kuMinuma-kuIwatsuki-kuToda CityToda CityMusashino lineTohoku/Joetsu Shinkansen lineTohoku Main lineKeihin-Tohoku lineIkebukuro Line (Route5)Metropolitan ExpresswaySaitama Omiya Route, Metroporitan ExpresswayKawaguchi line Metroporitan ExpresswayTokyo-Gaikan ExpresswayArakawa RiverKamogawa RiverShin-Shibakawa RiverShibakawa RiverKounumagawa RiverShibakawa RiverIt is easy to see why Toda will ood if the city’s levees or the levees upstream rupture—but the enre city may ood even if the breach is downstream.One hour aer the levee breachSix hours aer the levee breachFieen hours aer the levee breachMaximum ood depth (maximum cumulave value)Floodwaters will ow down from the northwestern part of Sakura-ku, Saitama CitySix hours aer the breach, they will arrive in Toda CityEven if the breach occurs upstream of the city, the oodwaters will reach the southern part of TodaFieen hours aer the breach, the enre city of Toda will be ooded37.6 km down the left bank from the mouth of the Arakawa Riverdue to rainfall completely overwhelming the levees… it will ood the enre city even if the overow is outside the cityNear Hanekura Bridge along Highway 463 (Nakajima, Sakura-ku, Saitama City)If the breach occurs here, upstream of the cityToda City will sll ood even if the overow occurs upstream of this pointIf the Arakawa River overows…What will happen?16

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