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- Title
Acute Physicochemical Effects in a Large River-Floodplain System Associated with the Passage of Hurricane Gustav.
- Authors
Bonvillain, Christopher; Halloran, B.; Boswell, Kevin; Kelso, William; Harlan, A.; Rutherford, D.
- Abstract
On 1 September 2008, Hurricane Gustav passed over the Atchafalaya River Basin (ARB) in south-central Louisiana. Anticipating physicochemical shifts due to concentrated precipitation and wind stress generated by this strong category 2 storm, we deployed a continuous recording multiparameter water quality sonde in a southern ARB bayou 3 days prior to storm arrival to document conditions before, during, and after hurricane landfall. Quarter-hourly physicochemical measurements taken over a 2-week period indicated that dissolved oxygen (DO), pH, and specific conductance all reached annual lows immediately following storm passage. The most pronounced post-storm fluctuation involved DO. Daily mean DO concentration dropped to hypoxic level (DO ≤ 2 mg/L) within 3 days of landfall, followed by near anoxic conditions within 5 days that resulted in extensive system-wide fish kills. Within 6 weeks, however, DO returned to, and pH was near pre-storm levels. To evaluate the impact of Hurricane Gustav on ARB physicochemistry, we contrasted data on DO, pH, temperature, and specific conductance collected from 16 lower ARB sampling sites over a 54-day interval prior to storm landfall with data collected during a 45-day post-storm period. Results indicated that water quality was highly dissimilar ( P < 0.0001) between the two periods.
- Subjects
ATCHAFALAYA River (La.); LOUISIANA; HURRICANE Gustav, 2008; HURRICANES; HYPOXEMIA
- Publication
Wetlands, 2011, Vol 31, Issue 5, p979
- ISSN
0277-5212
- Publication type
Article
- DOI
10.1007/s13157-011-0213-4