Abstract
Abstract. The present study aims at the evaluation of sources of uncertainty in modelling of heat transport in a river caused by the discharge coming from a cooling system of a designed gas-stem power plant. This study was a part of an Environmental Impact Assessment and was based on two-dimensional modelling of temperature distribution in an actual river. The problems with the proper description of the computational domain, velocity field and hydraulic characteristics were considered in the work. An in-depth discussion on the methods of evaluation of the dispersion coefficients in the model comprising of all four components of the dispersion tensor was carried out. It was shown that in natural rivers all components of a dispersion tensor should be taken into account to qualitatively reflect the proper shape of temperature distributions. The results considerably depend on the 2-D velocity field as well as hydraulic and morphometric characteristics of the flow. Numerical methods and their influence on the final results of computations were also discussed. All computations were based upon a real case study performed in Vistula River in Poland.
Highlights
A prerequisite for the construction of a new industrial plant is an Environmental Impact Assessment (EIA), understood as a formal process used to predict the environmental consequences of any development project
The present study is based on a case study aimed at building scenarios of the spread of heated water discharged from a designed gas-stem power plant on the Vistula River below Włocławek town (Kalinowska et al, 2012)
This study is based upon the computations of the spread of the heated water discharged from a designed gas-stem power plant located near Włocławek town on the Vistula River
Summary
A prerequisite for the construction of a new industrial plant is an Environmental Impact Assessment (EIA), understood as a formal process used to predict the environmental consequences of any development project. It is quite a common practice that professionals gain personal experience, with respect to the models developed by themselves They have good knowledge on how their parameters and boundary conditions should be assigned to yield satisfactory results, and at the same time they realise that their model may fail under some circumstances. The present study is based on a case study aimed at building scenarios of the spread of heated water discharged from a designed gas-stem power plant on the Vistula River below Włocławek town (Kalinowska et al, 2012). Such heated water constitutes an environmental problem in many situations and, is often called thermal pollution. A two-dimensional temperature field resulting from a warm water discharge was sought
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