- A. Identify and prioritize potential retrofits to city buildings for rainwater capture.
- Create guidance for private property owners to develop and implement rainwater collection.
- Increase awareness of co-benefits of low-impact development.
- Consider installations that capture, retain and treat stormwater runoff from parking lots, driveways and roads.
Low Impact Development (LID) is a design approach that emphasizes conservation and use of on-site natural features to protect water quality. Collecting rainwater is a great example of LID. By collecting and using rainwater, we can greatly reduce the use of treated water for landscape irrigation. Rainwater collecting systems, especially from roof areas, are easy to install and there are a variety of sizes and styles of rain barrels and cisterns for rainwater storage. Other examples of LID include bioswales, rain gardens, green roofs, and more.
The National Resource Defense Council analyzed 17 LID case studies comparing the cost of LID and conventional stormwater management practices. In most cases, LID methods were both economically and environmentally beneficial, with capital cost savings ranging from 15 to 80%.
Since Clearwater Greenprint was first created, the city has incorporated LID elements into its Stormwater Drainage Criteria Manual and the development standards it uses for the US 19 and Downtown zoning districts. The Cleveland Streetscape Phase III design will also incorporate LID practices such as integrating stormwater detention into vegetated street areas so that it can be stored temporarily until it can drain naturally instead of diverting it directly into the city’s stormwater system.
Looking forward, the city will identify and prioritize potential retrofits to city buildings for rainwater capture. Additionally, the city will create guidance for private property owners to develop and implement rainwater collecting plans with a goal of capturing runoff from at least 10% of impervious surfaces, or surfaces that prevent the entry of water (e.g., asphalt, concrete, brick, and stone). The focus of the efforts should be on the roof area, but might include installations that capture, retain and treat stormwater runoff from parking lots, driveways and roads. Rainwater collecting systems, in combination with reuse of greywater, which is relatively clean wastewater from baths, sinks or washing machines, will reduce demand for and expense of piped water for landscape irrigation.
As part of the overall sustainable water resources program, integrating LID principles into building and site designs, such as bioswales, rain gardens, and other vegetated areas, will go a long way toward raising awareness of water resource issues. LID also has many non-water saving benefits, including conserving greenspace and stormwater retention. The city will work to increase awareness of these co-benefits.