Selecting A Water
Why does the building owner wish to apply a water harvesting system for the building? What are the motivations?
Motivations may include:
- A genuine interest in “being green” and reducing the impact of the building on the environment.
- Earning LEED certification for a building.
- A requirement by the local municipality to reduce the amount of rainwater entering the sewer or stormwater system.
- Conserving potable water to save water costs and interest in ROI for the system.
- Reducing water processing fees to local municipalities.
- Creating public relations opportunities for the organization as a “good neighbor”.
- Enhancing the beauty of the building through a green roof or vegetated swales.
On-Site Water Sources
The planned building use, size and location all affect the logical sources of water for harvesting.
Our Scoping phase addresses these and other questions:
- What is the average annual rainfall amounts at the building location?
- What is the planned design and square footage of the building’s roof? What percentage will receive collectible rainwater?
Is there a cooling system that generates condensate?
- What is the anticipated daily supply of greywater (gray water) from showers, sinks and other sources?
- Will the building generate ground water through a sump system?
Harvested Water Uses
We will also want to consider how harvested water might be used in your building and on the property.
- For systems supporting toilet flushing, what is the occupancy? For our analysis, it’s less about the number of fixtures and more about how many times per day they are flushed.
- What is the Gallons Per Flush (GPF) of each fixture type?
- What is the anticipated water demand for planned grass and landscaping?
- Is there a desire to use the harvested water for a cooling tower or as backup to a fire suppression system?
These other factors affect the total system design:
- What are the costs for municipal water? What are they expected to be 5 to 10 years out?
- What are the costs for sewage treatment in the area?
- Does the community have any regulations in place addressing the usage of greywater or rainwater?
- Can the building design accommodate a planted roof system?
- Can the parking area accommodate a vegetated swale instead of a mechanical filtration system?
Wahaso – Water Harvesting Solutions works closely with the building architects and engineers to develop a system that best meets the need of the property and the desires of the property owner.
Get a free Analysis
How Much Rainwater is Available? How much greywater do you need? If you have a commercial project, we are happy to run our proprietary Water Balance Model for your location to project the potential water savings value of a system.
For more information on our processes and approaches to harvesting, feel free to contact us.