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89 HDB blocks throughout Yishun and Jurong can have UrbanWater Harvesting Methods (UWHS) put in at widespread areas by 2027, HDB mentioned in a press launch issued on Monday (Mar. 28).
In accordance with HDB, the programs might doubtlessly reap water financial savings of about 17,500 cubic metres per yr, or the typical yearly consumption of potable water of over 85 items of 4-room HDB flats.
The tender for the implementation of this undertaking will shut on Might 20. Building is predicted to start in 2023 and full in 2027.
Right here is the total listing of blocks in Yishun and Jurong that may have the UWHS put in:
Screenshot through HDB.
That is the primary time the UWHS might be put in in current housing estates in Singapore.
What’s the UWHS?
In accordance with HDB, the UWHS is designed to “maximise the amount of rainwater collected by harvesting stormwater floor runoff from the bottom space surrounding a number of residential blocks”.
The system’s rainwater harvesting functionality and water detention capability permits for a single UWHS to reap from and dispense water to as many as 12 residential blocks, for non-potable makes use of, resembling washing of widespread areas and watering of crops.
The UWHS can save as much as 50 per cent of water utilization for these functions, mentioned HDB.
Moreover, the channelling of stormwater into the UWHS’ harvesting and detention tank can mitigate potential flood dangers in an property within the occasion of a heavy downpour by slowing down the speed of discharge of stormwater into the drainage system downstream.
The way it works
The stormwater from floor runoff that’s discharged into an property’s surrounding drainage system will first be channelled into the UWHS’ harvesting and detention tank.
It’s going to then be pumped to the remedy room and public drain.
Here is an illustration by HDB to indicate how the UWHS works:
Picture through HDB.
Was first launched in BTO tasks in 2018
The system was first launched in all appropriate Construct-to-Order (BTO) tasks in 2018.
In accordance with HDB, retrofitting the UWHS into current estates is tougher.
In new BTO tasks, the UWHS infrastructure could be deliberate and designed upfront to make sure it’s situated the place essentially the most quantity of rainwater could be collected by way of the drain networks.
Putting in UWHS into current estates, nonetheless, includes analysing the movement of the rainwater within the catchment space, and figuring out appropriate places to accommodate the system amidst different important companies infrastructure that might already be in place underground.
HDB mentioned that it’ll examine the cost-effectiveness of the system in decreasing potable water consumption and mitigating flood dangers in Yishun and Jurong first, earlier than deciding on the extent of future scale-up to different appropriate estates.
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Prime pictures through Google StreetView & HDB.
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