Temporal And Spatial Changes of Some Indicators of The Water Quality of The Tigris Within Nineveh Governorate/ Iraq

Abstract

Three sites along the Tigris, stretching from the Mosul Dam Lake to the Qayyarah neighborhood, were
chosen to collect water samples in order to determine the Tigris' water quality. The research lasted six
months (September 2020-February 2021). Physical and chemical parameters exhibited local and
temporal alterations, but they were consistent with all previous studies findings, that the Tigris water is
alkaline, with the exception of a value of (171) NTU reported in November, when the turbidity ranged
between (0.54) and (9.6), putting it in the category of excellent water in terms of suspended matter. The
total dissolved solids findings revealed an increase in value as moving south. The water of the Tigris River,
on the other hand, is classified as extremely hard, with total hardness ratings higher than those reported
prior to the dam's construction in the early 1980s. In terms of plant nutrients, the current study found that
sulfate, nitrate, and orthophosphate levels fluctuated due to pressure from a variety of domestic,
agricultural, and industrial sources, as well as seasonal variations.