Keywords : Tigris River

Estimation of the Concentrations of some Heavy Metals in Water and Sediments of Tigris River in Mosul City

Eman S. Al-Sarraj; Muna H. Jankeer; Sati M. Al-Rawi

Rafidain Journal of Science, 2019, Volume 28, Issue 1, Pages 1-10
DOI: 10.33899/rjs.2019.159401

Tigris river is considered among the most important sources of water in Iraq. Therefore, an ecological study has been conducted on this river within a stretch in Mosul city starting from Mushirfa site north till Al-Busaif village in the south. The study aimed at verifying the impact of various pollutants including heavy metals on water and sediments. The study started on Spring 2011 through Winter 2012.
The heavy metals have been extracted by stander method using Atomic Absorption Spectrophotometer and the estimation of some heavy metal concentrations such as (Zn, Cu, Cd, and Pb) in river water and sediments has been done.
The result reveled a significant increase in the concentration of studied heavy metals in water and sediments in the area of Al-Busaif compared with Mushirfa area (as a control group). The concentration of heavy metal in water followed the descending order: Zn< Cu< Pb .

Bioaccumulation of Zinc in Four Tissues of Local Fishes Collected from Tigris River in Mosul City

Eman S. Al-Sarraj; Muna Jankeer; Sati M. Al-Rawi

Rafidain Journal of Science, 2018, Volume 27, Issue 3, Pages 15-22
DOI: 10.33899/rjs.2018.159379

The study determined the concentration of Zinc in local fish tissues (liver, muscle, gills). The local fishes (Cyprinuscarpio, Condrostomeregium, Liza abu and Carassiuscarassius). All of this samples were collected from Mushirfa, which considered as a control, Middle of the city (near the old bridge of Ninevah ) and Al-Busaif locations. The results showed that the accumulation of Zinc in fish tissues was followed descending order: Liver > Gills > Muscle. While depended on fish collected locations, the bioaccumulation of this metals has followed the order, Al- busaif area > Middle city >Mushirfa area. .

Some Indicators of Water Quality of the Tigris in Mosul City an Inferential Study

Eman S. Al-Sarraj; Muna H. Jankeer; Sati M. Al-Rawi

Rafidain Journal of Science, 2014, Volume 25, Issue 2, Pages 1-22
DOI: 10.33899/rjs.2014.86097

Some water quality indicators of the Tigris within Mosul city were studied. Five sites starting from Mushairfa to Albosaif were covered. Sampling sites were selected at points faraway from riverbanks and at running stream.
Some physical, chemical and biological parameters were measured to detect the influence of untreated outfall discharges upon river water quality and on aquatic life particularly fishes.
The study particularly focused on organic load in term of BOD5, Dissolved Oxygen as well as on nutrients. Comparing the obtained results with authorized guidelines of pollution indicators showed that the Tigris River water is clean, and possesses high percent of saturation with Oxygen. The levels of nutrients were with in recommended values. Throughout the period of study, EC, pH, temperature values showed some relative low variations. Turbidity showed distinctive rise in spring due to rainfall run off. All tests evidently showed that Tigris river water is good and the pollutants vanish with dispersion and dilution of upstream dam discharges. Flow velocity and self-purification may contribute to support water life particularly fishes.

The Impact of Water Oscillation on Hydrophytes and Macro algae Growth in Tigris River within Mosul Area

Mazin N. Fadhel

Rafidain Journal of Science, 2013, Volume 24, Issue 1, Pages 17-30
DOI: 10.33899/rjs.2013.67493

Two stations have been selected during the course of Tigris River within Mosul city; the first one is before entering the city, while the other located downstream the city. Results clearly exhibit a significant difference in water quality between the two locations.
Aquatic plants and macro-algae populations along about 17 Km of the rivers course were identified. Six aquatic plant species have been identified Potamogeton pusillus, Potamogeton nodosus, Ceratophyllum demersus, Phragmites australis, Phragmites sp. and Typha sp.
Potamogeton pusillus a species was the predominant species during the study period, on the other hand macro-algae included Hydrodiction riticulatum, Cladophora glomerata, Chara vulgaris, Chara sp. and Nitella sp., the species Chara vulgaris and Cladophora glomerata from green algae phylum were the predominant species of the five algal identified species during the study period.
Clear trespass on the river banks was recorded, sand and gravel queries negatively affecting the river by forming shallow ponds and swamps which are perfect for aquatic plants and algae communities to prosper and flourish leads to dramatic detrimental impact on river health.