Estimation of releases into rivers with the steady-state surface water model EXWAT using dichloromethane
- Gesellschaft fuer Strahlen- und Umweltforschung Muenchen, Neuherberg (Germany, F.R.)
The surface water model EXWAT is applied to monitoring studies of hazardous substances to estimate site-specific emissions from measured concentrations. The model includes the main processes which govern the fate of chemicals in rivers, namely, advection, volatility, degradation processes, sedimentation, resuspension, and protonic equilibria. The steady-state solution of the linear mass balance equations leads to proportionality between input and concentration of a chemical, which is used to assess input rates from measured concentrations. Subsequently, the model can be used for pollution control and identification of unknown releases. With measured concentrations in the Rhine near Koblenz (95 km downstream from the mouth of the river Main) the load of dichloromethane from the tributary Main was estimated. The comparison with measured concentrations in the tributary mouth has a good agreement in this case.
- OSTI ID:
- 6971001
- Journal Information:
- Ecotoxicology and Environmental Safety; (USA), Vol. 19:1; ISSN 0147-6513
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORINATED ALIPHATIC HYDROCARBONS
ECOLOGICAL CONCENTRATION
FEDERAL REPUBLIC OF GERMANY
WATER POLLUTION
SURFACE WATERS
MATHEMATICAL MODELS
MONITORING
STEADY-STATE CONDITIONS
EUROPE
HALOGENATED ALIPHATIC HYDROCARBONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION
WESTERN EUROPE
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)