Abstract:This study was concerned with assessment the water quality of Euphrates River in the middle of Iraq. Water quality assessment is the overall process of evaluation of the physical, chemical and biological nature of the water. Water pollution for Euphrates River in Middle of Iraq (Babylon, Al-Najaf, and Al-Diwaniya governorates) occurs in both rural and urban areas. In rural areas, drinking water from natural sources such as rivers and streams is usually polluted by organic substances from upstream users who use… Show more
“…The Cyanophyceae algae are characterized by their high endurance to extreme temperature and pH, ability to restore nitrogen and phosphorus, and producing toxic materials [25]. The genus Oscillatoria is the most frequent recorded species in all seasons and this might explain its ability to intake crucial nutrients, and to endure extreme high temperature [26,6] However, the Chlorophyceae is replace later and this result has confirmed what is stated in [27,28,13] .…”
There is a scarcity of data regarding algal flora of Tigris River in the territory of Baghdad. The present study deals with Tigris River in Al-Dora site in Baghdad province from November 2014 to June 2015 in order to shed light on its epiphytic Algae on (Phragmites australis) and epipelic algae. An amount of 183 and 154 species of epiphytic and epipelic algae are identified respectfully. The Bacillariophyceae (diatoms) are the dominant algal group followed by Cyanophyceae and Chlorophyceae. Moreover, 90 species are shared between two groups of algae (epiphytic and epipelic) and identified at the study site. Additionally, the seasonal variations and diversity of algal species are noticed. The highest number of epiphytic algae is 772.05 x 104 (cell/gm) in winter and the lowest number is 161.13 x 104 (cell/gm) in Summer; where as the highest number of epipelic algae is 20.07 x 104 (cell/ cm²) in Winter and the lowest number is 6.53 x 104 (cell/ cm²) in Summer.
“…The Cyanophyceae algae are characterized by their high endurance to extreme temperature and pH, ability to restore nitrogen and phosphorus, and producing toxic materials [25]. The genus Oscillatoria is the most frequent recorded species in all seasons and this might explain its ability to intake crucial nutrients, and to endure extreme high temperature [26,6] However, the Chlorophyceae is replace later and this result has confirmed what is stated in [27,28,13] .…”
There is a scarcity of data regarding algal flora of Tigris River in the territory of Baghdad. The present study deals with Tigris River in Al-Dora site in Baghdad province from November 2014 to June 2015 in order to shed light on its epiphytic Algae on (Phragmites australis) and epipelic algae. An amount of 183 and 154 species of epiphytic and epipelic algae are identified respectfully. The Bacillariophyceae (diatoms) are the dominant algal group followed by Cyanophyceae and Chlorophyceae. Moreover, 90 species are shared between two groups of algae (epiphytic and epipelic) and identified at the study site. Additionally, the seasonal variations and diversity of algal species are noticed. The highest number of epiphytic algae is 772.05 x 104 (cell/gm) in winter and the lowest number is 161.13 x 104 (cell/gm) in Summer; where as the highest number of epipelic algae is 20.07 x 104 (cell/ cm²) in Winter and the lowest number is 6.53 x 104 (cell/ cm²) in Summer.
“…The initial 25 quality parameters were analyzed to develop the Iraq WQI. Nine 'inactive' parameters were removed by the experience method because they do not pose problems in the waters of Iraqi rivers [3,23,48,52,53], (Table 1). Applying the PCA method for the 16 reserved parameters produced three major components, whose cumulative variance is 81.89%, (Table 2).…”
Water quality evaluation is fundamental for water resources management. Water quality index (WQI) is an accurate and easily understandable method for assessing water quality for different purposes. In this study, the Iraqi water quality index (Iraq WQI) was constructed to be used to evaluate the Iraqi rivers for drinking. For this purpose, some statistical techniques, experts’ advice, literature reviews, and authors’ experience were used. First, the principal component analysis (PCA) method and the modified Delphi method were used to select the most influential water quality parameters and their relative weights. Second, the quality curves of selected parameters were drawn to calculate the WQI scores basing on the water quality standards. Of twenty-seven parameters, six parameters were chosen to be within the index depending on their effect on water quality in order to reflect the specific characteristics of the Iraqi waters. The Iraq WQI was applied to the Tigris River within Baghdad as a case study and for some sites on other Iraqi rivers, and gave acceptable results. Results revealed that the statistical techniques used in this paper can be applied in all Iraqi rivers considering their specific characteristics. Based on the reliability of the Iraq WQI, there is no longer a need to use Indices designed for water for other countries.
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