Sponge-lane rain gardens
ResultStanding water now clears in under two hours. 180 metres of lane converted, zero rain closures in the following wet season, and the design copied by two neighboring streets.
- Problem
- After every heavy rain, the lane outside a lower-secondary school stayed under ankle-deep water for up to two days. Students waded to class, and the school closed whenever the river and the rain arrived together.
- Student solution
- A grade-8 class replaced strips of concrete along the lane with sunken rain gardens of gravel, sand, and native grasses, plus kerb cuts that send runoff into them instead of the drain.
- Pilot partner
- Ward-level public works team
- From Portal
- Mekong Delta 2045