Magic simulation of surface water acidification at, and first year results from the Bear Brook Watershed Manipulation, Maine, USA
The catchments of East and West Bear Brooks, Maine, USA, with similar stream chemistries and hydrographs, have been hydrologically and chemically monitored for 3.5 years. These clear water streams are low in ANC (0-70 microeg/litre), with variations caused by changing concentrations of base cations, SO4, NO3, and Cl. After one year of treatment, the response of the stream chemistry and the response modelled by MAGIC are similar. Episodes of high discharge in the treated catchment are not characterized by lower ANC and pH, and higher Al than prior to the manipulation. Concentrations of NO3 have increased about 10 microeg/litre during the dormant season, presumably due to additional nitrification of N and NH4. Discharge-chemistry relationships indicate that changes in stream chemistry, except for NO3, are dominated by ion exchange reactions in the upper part of the soil profile.
- Research Organization:
- Maine Univ., Orono, ME (United States). Dept. of Geological Sciences
- OSTI ID:
- 7064404
- Report Number(s):
- PB-93-121291/XAB; EPA--600/J-92/400
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ACID NEUTRALIZING CAPACITY
ACIDIFICATION
AIR POLLUTION
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE
COMPUTERIZED SIMULATION
DEVELOPED COUNTRIES
ELEMENTS
GROUND WATER
HALOGENS
HYDROGEN COMPOUNDS
HYDROLOGY
ION EXCHANGE
IONS
MAINE
NITRIFICATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POLLUTION
SIMULATION
SOILS
STREAMS
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE WATERS
USA
WATER
WATER CHEMISTRY
WATER POLLUTION
WATERSHEDS