Journal
ESTUARIES AND COASTS
Volume 36, Issue 2, Pages 319-333Publisher
SPRINGER
DOI: 10.1007/s12237-012-9576-x
Keywords
Storms; Estuaries; Nutrients; Organic matter; Hawaii; Water quality
Funding
- Hawaii County Department of Public Works
- National Science Foundation (NSF) [0237065]
- National Science Foundation (NSF) UHH Research Experience for Undergraduates
- National Oceanic and Atmospheric Administration (NOAA) [RIEL-38]
- University of Hawaii Sea Grant College Program, School of Ocean and Earth Science and Technology from NOAA Office of Sea Grant, Department of Commerce [NA050AR4171048]
- Direct For Education and Human Resources
- Division Of Human Resource Development [0833211] Funding Source: National Science Foundation
- EPSCoR
- Office Of The Director [0903833] Funding Source: National Science Foundation
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Effects of storms on the water quality of Hilo Bay, Hawaii, were examined by sampling surface waters at 6 stations 10 times during low-flow and 18 times during high-flow (storms) river conditions. The direction of a storm's impact on water quality parameters was consistent among storms and most stations; however, direction of the impact varied with the parameter. High river flow conditions increased concentrations of nitrate and decreased those of dissolved organic nitrogen (N); effects on ammonium and particulate N were station specific. Storms also increased dissolved organic and particulate carbon (C) concentrations. Dissolved phosphorus (P) concentrations were not affected by high river flow events. Dissolved organic forms dominated the N, C, and P pools under both low- and high-flow river conditions. Soil-derived particles and fecal indicator bacteria increased during storms, while chlorophyll a concentrations and bacterial cell abundances decreased. Our results suggest that an increase in storms with global warming could impact water quality of tropical estuaries.
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