2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2021 | 8:30 AM - 10:30 AM | LONG-TERM WATER QUALITY TRENDS RELEVANT TO DRINKING WATER SUPPLY IN THE HILLSBOROUGH AND ALAFIA WATERSHEDS OF FLORIDA, USA | Virtual Platform
LONG-TERM WATER QUALITY TRENDS RELEVANT TO DRINKING WATER SUPPLY IN THE HILLSBOROUGH AND ALAFIA WATERSHEDS OF FLORIDA, USA
The Hillsborough and Alafia Rivers, which drain much of the greater Tampa Bay, FL, watershed, have long histories of water quality challenges driven by urban/suburban growth as well as agricultural and industrial operations. The importance of water quality within these watersheds increased in 2002 when the rivers became a major source of drinking water for the Tampa Bay region. To gain a better understanding of water quality trends in these rivers and how trends may be related to climate and land use, we examine water quality characteristics relevant to drinking water supply (fluoride concentrations and turbidity) from 1999–2019 using weighted regression on time, discharge, and season (WRTDS) from the USGS EGRET package in R. We present seasonal and long-term observed and flow-normalized trends graphically and estimate the uncertainty of long-term trends. Flow-normalized fluoride concentrations decreased significantly at two Alafia River sites, and flow-normalized turbidity generally decreased at five Hillsborough River and tributary sites. We examine potential drivers of these changes, including land use change, and implications for future water quality and drinking water use. These results will help drinking water managers develop water quality priorities when considering future demand.
- Pollution
- Ecohydrology
- Adaptive management
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Presenters/Authors
Casey Harris
(), University of Florida, caseyharris@ufl.edu;
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Alexander Reisinger
(), University of Florida, reisingera@ufl.edu;
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Wendy Graham
(), University of Florida, wgraham@ufl.edu;
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