Chemical composition of softwater Florida lakes and their sensitivity to acid precipitation
Journal Article
·
· Water Resour. Bull.; (United States)
Based on alkalinity data for 596 lakes, 31 percent of Florida's 7300 lakes have < 100 ..mu..eq/L alkalinity and are sensitive to acid deposition. More than two-thirds of the lakes in 12 northern Florida counties fit this criterion. Increasing aluminum and decreasing nutrient and chlorophyll a concentrations were observed with decreasing pH in a survey of 20 softwater lakes. Maximum measured aluminum values (100-150 ..mu..g/L) are below levels associated with fish toxicity. Factor analysis showed that lake chemistry was related to three principal factors, representing three major processes: watershed weathering, acidification, and nutrient inputs. An acidification index defined as the difference between excess SO/sub 4//sup 2 -/ and excess (Ca/sup 2 +/ + Mg/sup 2 +/) accounted for 74 percent of the variance in lake pH. Comparison of historical (late 1950s) and present data for pH, alkalinity, and excess SO/sub 4//sup 2 -/ indicated loss of alkalinity (> 25 ..mu..eq/L) and increases in excess SO/sub 4//sup 2 -/ (16-34 ..mu..eq/L) in several softwater lakes.
- Research Organization:
- Environmental Science and Engineering, Inc., Gainesville, FL
- OSTI ID:
- 6673105
- Journal Information:
- Water Resour. Bull.; (United States), Journal Name: Water Resour. Bull.; (United States) Vol. 20:1; ISSN WARBA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID NEUTRALIZING CAPACITY
ACID RAIN
ACIDIFICATION
ALUMINIUM
ATMOSPHERIC PRECIPITATIONS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMISTRY
CHLOROPHYLL
DEPOSITION
ELEMENTS
ENVIRONMENTAL EFFECTS
FEDERAL REGION IV
FLORIDA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LAKES
METALS
MONITORING
NORTH AMERICA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PHYTOCHROMES
PIGMENTS
PORPHYRINS
RAIN
SENSITIVITY
SULFATES
SULFUR COMPOUNDS
SURFACE WATERS
TOXICITY
USA
WATER CHEMISTRY
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID NEUTRALIZING CAPACITY
ACID RAIN
ACIDIFICATION
ALUMINIUM
ATMOSPHERIC PRECIPITATIONS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMISTRY
CHLOROPHYLL
DEPOSITION
ELEMENTS
ENVIRONMENTAL EFFECTS
FEDERAL REGION IV
FLORIDA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LAKES
METALS
MONITORING
NORTH AMERICA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PHYTOCHROMES
PIGMENTS
PORPHYRINS
RAIN
SENSITIVITY
SULFATES
SULFUR COMPOUNDS
SURFACE WATERS
TOXICITY
USA
WATER CHEMISTRY