A NON-DIMENSIONAL MATHEMATICAL MODEL OF SALINITY MEASUREMENT IN THE CHAOPHRAYA RIVER USING AN UNCONDITIONALLY STABLE FINITE DIFFERENCE METHOD

摘要

The total quantity of salinity in water resources can affect to human health. Salinity assessment refers to the measurement of the quantity of salt in sources of fresh water. There are two main methods of measurement the concentration of salinity in rivers such as the field measurement and the mathematical modeling. There are many research have been proposed several dimensional mathematical models of salinity measurement. In this research, a non-dimensional mathematical model of salinity measurement is proposed. The south Chaophraya, Thailand river is considered. The physical parameters setting techniques are also proposed. An unconditionally stable finite difference techniques is employed to approximate the salinity along the river. The approximated salinities are compared with the actual monitored data. The proposed salinity measurement techniques gives good agreement results.