Author(s): W. Rodi

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Abstract: The prediction of the distribution of pollutants,water quality parameters and suspended sediments inrivers and reservoirs is an important task in hy-draulic engineering practice.For certain problems,predictions are possible with hydraulic models,butthis is usually the case only for sma11-scale andshort-term phenomena,hile the distribution of pol-lutants in river networks extending over thousandsof kilometers or in reservoirs over many years isvirtually impossible to simulate in the laboratory.For the prediction of such situations,mathematicalmodels are necessary,and since analytical calcula-tions are usually impossible due to the complexityof the boundary conditions and input parameters inpractical problems,numerical models have to be em-ployed,making use of the enormous number-crunchingabilities of present-day computers.However,theseare not,as is sometimes implied,necessarily modelsthat solve numerically the differential equationsgoverning the physical processes.

DOI:

Year: 1985