Dear all,
I am working on a project (NC-V4, not zero-lot line) with a rainwater harvest for flushing toilets and for irrigation.
The harvest capacity is about the 20% of the run-off volume, while the rest is managed through a dry-wells system (after a contaminant and pollutant cleaning treatment). As a result, all the run-off volume goes into the aquifer and nothing goes into the urban sewerage.
Could the combination of rainwater harvest and dry-wells be considered as a Low-Impact Development strategy?
I took a look on EPA website, but I haven't found any clarification about it.
Thanks,
Claudio
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
September 21, 2017 - 11:04 am
The reuse for the toilet flushing is a grey area. That's not really mimicking the natural hydrologic cycle. Irrigation should be fine, provided you can actually use all the water.
Claudio Bonalda
1 thumbs up
September 21, 2017 - 11:17 am
Thanks for your reply Michael.
The reused rainwater actually covers the totally of the irrigation demand (about the 20% of the run-off volume).
Could I achieve the credit if the remaining 80% is managed through dry-wells?
Therefore, all the run-off volume goes into the aquifer and nothing goes into the urban sewerage).
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
September 21, 2017 - 2:12 pm
I think it is a viable approach. Be sure to beef up the narrative about the irrigation....you want to explain that this volume is returned to the hydrologic cycle via evaptranspiration and transpiration.
Claudio Bonalda
1 thumbs up
September 21, 2017 - 3:32 pm
perfect, thanks again!