Flood Hazard Map (Flood, Inland Water, high tides)

As of June 1, 2022 We released inundation hazard map of 15 wards of the city.
[September 2021] Flood Hazard Map for Sakae Ward has been released.
[August 12, 2021] In the Kanagawa Ward Hazard Map, there was an error (Koyasu Elementary School) in the location of the elementary school.
[June 28, 2021] Flood hazard maps for Kanagawa Ward and Kanazawa Ward have been released.

　The Flood Hazard Map is a compilation of three hazard maps: Flood, inland water, and high tides.
※Until now, floods and inland waters have been created and distributed separately.
　high tides is the first city in Yokohama based on the inundation area map created by Kanagawa Prefecture.

Based on 　the Flood Control Law (Article 15 of the Flood Control Law, Article 11 of the Enforcement Regulations of the Act), in order to ensure smooth and prompt evacuation in the event of a flood, flooding occurs when a river overflows due to the largest possible rainfall Information such as evacuation shelters is displayed in the flood inundation area map that displays the expected flood inundation area and the assumed water depth.

　It is a map that summarizes various information such as the area where flooding from sewer pipes and waterways is expected and the depth of flooding due to the largest possible rainfall (153 mm per hour).
The inland water hazard map of Yokohama City is not based on the Flood Control Law, but we have created it to utilize it for smooth evacuation behavior against inundation and improvement of disaster prevention awareness from normal times.

Based on 　the Flood Control Law (Article 15 of the Flood Control Law, Article 11 of the Enforcement Regulations of the Act), in order to ensure smooth and prompt evacuation during high tides, information such as evacuation centers is displayed on the high tides inundation area map, which shows the estimatedhigh tides area and the estimated water depthhigh tides.
(Basic configuration conditions)
　（1） Assuming the largest typhoon ever in Japan (central pressure of Muroto typhoon, movement speed of Ise Bay typhoon, storm radius)
　（2） Setting a typhoon route that generates the largest high tides in Tokyo Bay, Kanagawa Prefecture.
　（3） Considering floods in rivers at the same time as high tides
　（4） Assuming the worst situation, we expect a breach of levee and other levee
※high tides inundation area map (9 wards): Tsurumi Ward, Kanagawa Ward, Nishi Ward, Naka Ward, Minami Ward, Hodogaya Ward, Isogo Ward, Kanazawa Ward, Kohoku Ward

　My Timeline is your own evacuation action plan that has been organized in chronological order in advance according to the family structure and local environment of each person in response to disasters that may occur in the future, such as typhoons and heavy rain floods.
　Check the hazard map and create a personal timeline for each person.
　 ◎About my timeline (Yokohama-shi homepage)

・　Page (River water level information) of Yokohama-shi water disaster information (outside site)
・　Earth and sand disaster hazard map
・　Past disaster history