Publication of Rainwater Discharge Assumption Area Map
About the Rainwater Discharge Assumption Area Map
The "Rainwater Discharge Assumption Area Map" indicates areas where flooding is expected if rainwater cannot be discharged from drainage facilities due to the assumed maximum scale rainfall (153 mm per hour) as stipulated in Article 14-2 of the Flood Control Act.
Differences Between the Rainwater Discharge Assumption Area Map and the Rainwater Inundation Assumption Area Map
The Rainwater Discharge Assumption Area Map is created based on Article 14-2 of the Flood Control Act,
while the Rainwater Inundation Assumption Area Map has no legal basis and is intended to help recognize the risk of internal water flooding within Inagi City.
About Terms
Internal Water Flooding
A phenomenon where drainage facilities become unable to process rainwater during heavy rain, causing water to accumulate on the ground.
Expected Maximum Rainfall
Rainfall with a probability of occurring less than or equal to 1/1,000 in one year
(1/1,000 means it occurs approximately once every thousand years.)
Attached File
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This page is managed by the Urban Environment Management Department Sewerage Division
2111 Higashi-Naganuma, Inagi City, Tokyo 206-8601
Phone number: 042-378-2111 Fax number: 042-378-9719
Contact Us for the Sewerage Division, Urban Environment Management Department, Inagi City