Quality assessment of rooftop runoff and harvested rainwater from a building catchment
- Quality assessment of rooftop runoff and harvested rainwater from a building catchment
- 이주영; 김형준; 한무영
- correlation analysis; first flush; principal component analysis; rainwater harvesting
- Issue Date
- Water science and technology
- VOL 63, NO 11, 2725-2731
- A major obstacle to the promotion of rainwater harvesting is chemical and microbiological concerns.
To determine its suitability as an alternative water resource, water quality parameters such as
pH, turbidity and metal ion concentrations and counted total coliform, Escherichia coli and
heterotrophic bacteria were measured. It was observed that the stored rainwater had a neutral
average pH and that its turbidity depended on the duration and intensity of the rainfall event. Metal
concentrations were within the permissible limits specified in the Korea drinking water standard. In
addition, counts of coliform, E. coli and heterotrophic bacteria were higher in the first flush 5 min
after the start of the rainfall event. Principal component analysis and correlation analysis through
40 events in 2009 showed that the quality of stored rainwater depends on the conditions of
the catchment and storage tank and the antecedent dry period.
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