Roof Runoff Water Quality

This publication discusses the presence of various pollutants in rooftop runoff and establishes some general guidelines regarding the use of collected rainwater in north carolina.

Roof runoff water quality.

Count the number of downspouts coming from your roof. Roof runoff water runoff coefficient. 2013 an investigation of the water quality of rainwater harvesting systems. Runoff from agricultural land and even our own yards can carry excess nutrients such as nitrogen and phosphorus into streams lakes and groundwater supplies.

Haberland m bakacs m. Assessment of water quality of first flush roof runoff and harvested rainwater. Roof runoff water quality first flush roofing material potable abstract due to decreases in the availability and quality of traditional water resources harvested rainwater is increasingly used for potable and non potable purposes. Determine the percentage of water collected from each downspout p.

Journal of hydrology 466 467 115 126. Terms 1 to 17 from 17. Why might stormwater runoff be a problem. In this study we examined the effect of conventional roofing materials i e asphalt fiberglass shingle.

Runoff water quality from vegetated roofs is an important environmental aspect in particular if vegetated roofs are combined with open storm water systems. Rainwater running off roofs the quality of which is influenced and changed by an accumulation of roofing material and deposited materials. Epa drinking water standards for ph fecal coliforms aluminum al lead pb and zinc zn. Rooftop runoff has been shown to exceed u s.

All about rainwater harvesting. Divide 100 by the number of downspouts in order to obtain the percentage of water collected from each downspout. These excess nutrients have the potential to degrade water quality. Overall total p concentrations were higher in green roof runoff than control roof runoff.

Secondary contaminants do not pose a risk to human health. Aluminum zinc and ph are assigned secondarystandards which serve as guidelines to minimize offensive odor taste or aesthetic issues. In general we observed lower no3 nitrate and nh4 concentrations in green runoff than control roof runoff with the exception of runoff from the built up system which had higher no3 concentrations than the control roof runoff.