The low discharge simulation of the Shatt Al-Arab River and its influence on water quality

Abstract

In the present research, a numerical model was developed using the software package Mike 11 to study the water quality of the Shatt Al-Arab river (TDS, DO, TSS). Three stations were selected at the upstream of River (Qurnah) in the middle (Ma,aqal) and downstream (FAO). A value of (50 m3/sec) discharge was used in chain age (0.0 m) and time series file for heights of tides in chain age (240932.0 m) which was the implementation of the programme for one year after calibration and verification between field measurements and the programme outputs, they show that there is a good compatibility. On using the value (250 m3/sec) to explore the impact of high discharge of river on water quality, this study shows that the discharge of the river plays the role of reverse with increase and decrease in these characteristics as well as the location of measuring stations on the estuary, in which all the values of variables are increased has an obvious effect. If the measurement station became closer to estuary that’s lead to increase in the value for variables, because of the tidal river were the values for variables in some stations in flood case larger than of ebb case. The programme represents a first step towards preparing a programme containing more water quality variables. After the success of the programme, made it possible to calculate any of the three variables after knowing the value of the discharge of the river and enter the time series of tidal heights.