2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | EFFECTS OF LARGE-SCALE DRINKING WATER ORTHOPHOSPHATE ADDITION ON URBAN STREAM NUTRIENT DYNAMICS AND EUTROPHICATION POTENTIAL | Virtual Platform
EFFECTS OF LARGE-SCALE DRINKING WATER ORTHOPHOSPHATE ADDITION ON URBAN STREAM NUTRIENT DYNAMICS AND EUTROPHICATION POTENTIAL
Orthophosphate (PO43-) is the readily usable form of phosphorus for algal growth. Despite this concern, PO43- is commonly used as an additive at drinking water treatment plants to reduce lead in drinking water. Concurrently, deferred maintenance results in greater than a 30 percent loss of drinking water through failing urban water infrastructure in the Pittsburgh system. This study investigates the impacts of a large-scale PO43-addition to a drinking water distribution system on urban stream nutrients, including measurement of PO43- additions on algal growth. Water samples were collected from five urban streams and seven distribution system sites in the Pittsburgh area before and after PO43- addition. We conducted comprehensive water chemistry analyses, nitrate isotope analyses, and nutrient addition bioassay during before and after PO43- addition. Our study reveals a significant increase in total phosphorus in urban streams following PO43- addition, but no significant change in nutrient limitation status. However, nutrient addition bioassays revealed changes in nutrient limitation status in some urban streams following PO43- addition. This study underscores the need for more studies to evaluate the impact of PO43- additions to urban steams, particularly in cities with aged drinking water infrastructure.
- Nutrients
- Stream restoration
- Stream
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Presenters/Authors
Anusha Balangoda
(), University of Pittsburgh, ANB287@pitt.edu;
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Richard Dabundo
(), University of Pittsburgh, RCD35@pitt.edu;
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Isaiah Spencer-Williams
(), University of Pittsburgh, IMS17@pitt.edu;
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Sarah Haig
(), University of Pittsburgh, SJHAIG@pitt.edu;
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Emily Elliott
(), University of Pittsburgh, eelliott@pitt.edu;
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