Organic Compound Modelling in Tidal Waters

by Herwig Lehmann, Inst fuer Wasserwirtschaft, Wasserguete und Umweltschutztechnik, Hannover, Germany,



Document Type: Proceeding Paper

Part of: Coastal Zone '91

Abstract:

For a case study, different types of models of the entire harbor of Hamburg were developed. Some of these models are useful for describing oil transport in the case of an accident (e.g., leakages) and for determining organic compounds which originated from nonpoint and point sources. At present, controlling these substances requires large expenditures; moreover, more than 90 percent of the chemicals in the river and harbor waters are unknown. The AOX method of determining a broad group of both hydrophilic and lipophilic halogenated organics takes advantage of adsorption to activated carbon, together with gas chromatography. For hydrodynamic processes (such as advection and retention) two models of two-dimensional structures and a one-dimensional model for branched systems were developed. These are the bases of the calculation and determination of very hazardous substances in low concentrations (about 0.000,001 g/l). The models are used to simulate AOX for various parts of Hamburg harbor, and calibration was based on hourly and two-hourly AOX measurement data.

Subject Headings: Ports and harbors | Organic compounds | Water pollution | Tides | Mathematical models | Two-dimensional models | Simulation models | Germany | Europe

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