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BACKGROUND OF URBAN FLOODING IN BEIJING

Water accumulation under sunken overpasses is more common in urban roads, which will seriously paralyze the roads and have a great impact on the normal traffic of urban roads.
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Low Lying Water
Occurrence ratio: 43.19% severity:
Water Accumulation Under The Concave Overpass
Occurrence ratio: 30.29% severity:

Water accumulation in railway bridge holes is relatively rare, but the depth of water accumulation is relatively deep, causing great harm to people's life safety.
Subway flooding rarely occurs, mostly due to serious water accumulation on the road above, which affects the operation of the subway and the passage of passengers.

Water Accumulation In Railway Bridge Hole
Occurrence ratio: 23.96% severity:
Subway Flooding
Occurrence ratio: 2.56% severity: