ISSUE | POORLY MANAGED STORMWATER RUNOFF

Water pollution

What caused pollution ?

Stormwater running over roofs, driveways, roads and lawns will pick up pollutants such as oil, fertilizers, pesticides, dirt/sediment, trash, and animal waste. These pollutants “hitch a ride” with the stormwater and flow untreated into local streams, polluting the waters(surface water, groundwater).

Stagnant water + Scarcity of clean water

Water Supply

Groundwater pumps

Water tank

80% of groundwater in shallow wells is contaminated with pathogens

Issue Conclusion

According to the investigation, the current stormwater system is a “one-way flow” system where stormwater runoff goes straight into canals. There is no system to clean, to harvest and to store for heavy storms, which results in water pollution and scarcity of clean water.

Water system

Stormwater Management Strategy

Water harvesting

The strategy is to add drainage and pipes to better connect the water from the site to the river, and to design a reasonable flow direction according to the topography so that the water can flow naturally into the rain gardens and wetlands. The roof can be well used to collect rainwater and filter it to get clean water.

Year 0

Year 5

Year 10 polluted water barren farmland wetlands gradually formed wetland treatment system to filter, harvest and recycle rainwater

Masterplan

The project is to reframe the conventional wastewater treatment of rainwater instead as a new stormwater “circular flow” system to filter, harvest and recycle rainwater.

system factory-household rainwater system + terraced raingarden shared water shop rainwater system + raingarden