Stormwater Harvesting Roundup

November 11, 2008 § 1 Comment

Here are three recent items for folks interested in harvesting rainwater:

>>Today, UC Riverside researchers released a report entitled Capturing Urban Stormwater Runoff: A Decentralized Market-Based Alternative. It shows that decentralized stormwater interventions can be cheaper and more effective than centralized ones. Here’s their press release or download the full 16-page report (PDF) here. From the press release: the cost of building and maintaining these smaller, decentralized devices in urban areas could be 30 percent to 50 percent cheaper than constructing and operating large, centralized stormwater facilities. They also found that the value of the water that could be captured and used to recharge aquifers could amount to 38 percent of the cost of the smaller devices.

>>Via Boing Boing and my friend/neighbor/conspirator Federico: Take a look at this photo showing a beautiful artistic water harvesting system from Kunsthofpassage in Dresden, Germany!

View of Grassy Swale at Broadous School (from TreePeople's report)

View of Grassy Swale at Broadous School (from TreePeople Rainwater as a Resource report)

>>Last year, TreePeople released a report entitled Rainwater as a Resource: A Report on Three Sites Demonstrating Sustainable Stormwater Management. The report, available at TreePeople’s website, details three innovative green watershed management projects: Hall House, Broadous Elementary School, and Open Charter Magnet Elementary School. The report tells the stories behind these projects – site selection, design processes, costs, maintenance, quantification of various benefits from water quality to air quality to flood prevention, and more. The reports tell the stories warts and all! TreePeople has made some interesting mistakes learning opportunities… which should be expected when folks push boundaries with ambitious projects. The report presents plenty of lessons learned and important recommendations for similar projects in the future. Also included are some serious appendices with as-built plans, and details regarding maintenance and inspection.

From TreePeople’s Rainwater as Resource report:

Challenge: In the absence of a written maintenance agreement for the Broadous project, partners whose contractual obligations ended when construction did nevertheless found themselves working without compensation in an effort to maintain the viability of the project. The lack of a comprehensive and easy-to-use operations manual, inadequate communication among the partners and turnover among the district’s operations and maintenance staff exacerbated the problem.
Lesson: It is difficult to get anyone to accept liability as complicated issues arise. Construction and other
liabilities (such as issues of contaminated soils disposal, underground utilities, and construction fencing to ensure student safety) nevertheless have to be adopted. It is advisable to budget extra time, care and resources toward these challenges, and to plan quarterly meetings between representatives from all involved parties for the first year after construction. Written maintenance contracts and clear instructions should be developed and agreed upon before the project is completed.
Despite the intensive resource demands of the planning and implementation phase, the project does not end once construction is complete. The project will only fulfill its purpose if there is sustained interest and a plan for continuity.

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