International Journal of Marine Science, 2017, Vol.7, No.35, 353-360
359
Table 3 The HPI values and the water pollution descriptions at the studied stations during the studied periods
Stations
Season
∑Wi*Qi
HPI Value
Descriptions of water pollution
Station 1
Winter
97.19
196.97
polluted
Spring
88.38
179.12
polluted
Summer
73.14
148.23
polluted
Autumn
87.76
177.86
polluted
Station 2
Winter
87.49
177.31
polluted
Spring
89.50
181.37
polluted
Summer
71.20
144.29
polluted
Autumn
94.10
190.71
polluted
Station 3
Winter
68.82
139.46
polluted
Spring
81.69
165.54
polluted
Summer
70.26
142.39
polluted
Autumn
89.78
181.94
polluted
Station 4
Winter
89.18
180.72
polluted
Spring
79.12
160.34
polluted
Summer
66.95
135.67
polluted
Autumn
83.30
168.82
polluted
Station 5
Winter
77.77
157.59
polluted
Spring
83.35
168.92
polluted
Summer
64.35
130.41
polluted
Autumn
79.19
160.48
polluted
Note: ∑ Wi
=
0.493452
4 Conclusion
In the present study, the mean heavy metal pollution index (HPI) of Shatt Al-Arab River were found above the
critical index value 100, according to impermissible values of dissolved Pb, Fe and Cd. which indicates that are
represented as surface water pollution with respect to heavy metals.
Authors’ contributions
Conceived and designed the experiments: AL-Saad H.T.,
Al-Hejuje M. and Hussain N. Analysed the data: Al-Hejuje M. Wrote the
first draft of the manuscript: Al-Hejuje M. Contributed to the writing of the manuscript: AL-Saad H.T., Al-Hejuje M. and Hussain N.
Agree with manuscript results and conclusions: AL-Saad H.T., Al-Hejuje M. and Hussain N. Jointly developed the structure and
arguments for the paper: AL-Saad H.T., Al-Hejuje M. and Hussain N. Made critical revisions and approved final version: Al-Hejuje
M., AL-Saad H.T. and Hussain N. authors reviewed and approved of the final manuscript.
Acknowledgments
The researchers wish to acknowledge the Marine Science Center (University of Basra) for providing laboratory facilities.
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