Three composite variables were included in the EQI: a composite for number of sewage permits, a composite for industrial permits, and one for stormwater permits, all per 1000 km of stream length per county.
All stormwater will be captured and treated on-site, and all landscaping irrigation will be provided by graywater collected in cisterns with a combined 500-cubic-feet capacity.
Although the city tried to combat the problem by mandating stormwater controls for all new development in 1997, it has done little to fix runoff problems caused by buildings constructed before that time.
ON export from all stormwater wetlands was significantly less than untreated runoff entering the wetlands (p = 0.002).
The Nature Conservancy's water fund work, our coastal resilience experience, and our stormwater projects can all help Chinese cities achieve their targets.
This image is from the Rain Garden at the Oregon Convention Center, part of a sophisticated system designed to collect, clean, and retain all stormwater runoff from the Convention Center building's massive expansion roof. .
In an article published in August 2011 the team reported finding very high human fecal pathogen levels in all 45 stormwater outfalls they sampled in an area of Milwaukee with a separate sewer system.
Total phosphorus (TP) was the only pollutant to be effectively removed from all basins for all four synthetic stormwater tests.
Technologies such as detention basins, constructed wetlands, vegetative swales, and bioretention facilities (e.g., rain gardens) can all be used to slow down stormwater and biologically degrade the nutrients before they reach waterways.
Importantly AMC was a very good predictor of stormwater retention, with similar retention at all three sites for a given AMC, emphasizing that AMC is a relevant indicator of retention performance in any climate.
