Inundation hazard map

・Flood Hazard Map (PDF: 9,383KB)
・Inland water hazard map (PDF: 9,383KB)
・high tides Hazard Map (PDF: 6,624KB)
・Information side (PDF: 6,624KB)

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

Flood hazard maps are distributed at the Isogo Ward Office.
You can hand it over if you come to the 64th window in General Affairs Division on the 6th floor of the ward office.