Journal article
Modelling the hydrogeochemical response of a stream to acid deposition using the enhanced trickle-down model
Journal of Water Pollution Control Federation, Vol.63(3), pp.220-227
01/01/1991
Abstract
The enhanced trickle-down model was applied to White Oak Run, a second-order stream located in Shenandoah National Park in Virginia. Calibration of the model was performed using 5 years of field data. Simulation results indicated that 29 per cent of the incoming sulfate is retained in the upper soil horizons and 22 per cent is retained in the lower soil horizons. The alkalinity concentrations in the stream exhibited a seasonal variation, with increased values during low flow and decreased values during high flow. Ion exchange in the upper soil neutralized 39 per cent of the incoming acidity and weathering accounted for 14 per cent of the neutralization in the lower soil horizons. Long-term simulations indicated that White Oak Run is a delayed response system primarily due to high sulphate sorption capacity. Sulphate desorbed from the soils after 40 to 50 years, assuming no reductions in the current deposition. This had significant policy implications because reduction in deposition levels would not result in a quick recovery of the system.
Details
- Title: Subtitle
- Modelling the hydrogeochemical response of a stream to acid deposition using the enhanced trickle-down model
- Creators
- N P NikolaidisP K MullerJ L SchnoorHsien-Lun Hu
- Resource Type
- Journal article
- Publication Details
- Journal of Water Pollution Control Federation, Vol.63(3), pp.220-227
- ISSN
- 1047-7624
- eISSN
- 2327-7475
- Language
- English
- Date published
- 01/01/1991
- Academic Unit
- Occupational and Environmental Health; Civil and Environmental Engineering
- Record Identifier
- 9983997426002771
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