Rainwater that rushes into drains and rivers can cause flooding downstream. So why not hold back the water for gradual release, later?
FOR as long as many of us can remember, the Department of Irrigation and Drainage (DID) has always been on a building spree to mitigate floods – drains are constantly widened and rivers straightened so that rainwater that gushes off roof tops and land can be quickly whisked away into streams.
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