EMERGENCY WATER MANAGEMENT STRUCTURE

PROBLEM TO BE SOLVED: To provide an emergency water management structure that requires no maintenance normally, can be easily switched to a disaster mode during disaster, can be easily switched back to a normal mode from the disaster mode, is configured that piping does not easily get damaged and a storage tank does not easily float by disaster, does not easily generate bad odor, and can be easily cleaned and sterilized after disaster.SOLUTION: An emergency water management structure is provided in the vicinity of a building body 22 inside a ground-reinforced region and includes: a first sewage pipe 26 communicating with a plurality of drain pipes 24 into which sewage generated in the building body 22 is discharged; a second sewage pipe 28 of which a distal end communicates with a sewerage system A outside the ground-reinforced region; a pot-shaped underground measure 34 provided underground; a passage switching pipe 30 that connects the first sewage pipe 26 and the second sewage pipe 28 and is housed in the underground measure 34, for discharging sewage into the underground measure 34 during disaster; a sewage storage tank 36 provided underground and having a connection hole 36a opening toward the ground; and a third sewage pipe 38 of which one end opens toward the bottom surface of the underground measure 34 and the other end opens towards the sewage storage tank 36.