VALUES OF DISPERSION COEFFICIENTS IN STREAMS WITH DIFFERENT FLOW CHARACTER -- A CASE STUDY.

Water quality modelling is currently very effective and important tool in context of the task to ensure the required quality of water resources, respectively, to achieve (maintain) good water status according the Water Framework Directive (2000/60/EC). Mathematical models of water quality are an important tool for integrated water management, planning and protection. Integral part of such models is the modelling of fundamental physical processes affecting water quality - advection and dispersion. This paper documents results of measurements of the dispersion coefficient within the scientific project APVV 0274-10. Measurements in this project have been performed in various surface water bodies in Slovakia - lowland streams with low turbulence (drainage, irrigation channels), as well as in mountain streams with a high degree of turbulence. Within the field experiments both longitudinal, so as the transverse dispersion coefficients were measured. [ABSTRACT FROM AUTHOR]