AccScience Publishing / AJWEP / Volume 19 / Issue 4 / DOI: 10.3233/AJW220062
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RESEARCH ARTICLE

Trophic State Index for Euphrates River Passing Through Samawa City

Ansam Saad Al-Khafaji1 ,  Ibtehal Aqeel Al-Taee2*
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1 Department of Desert Studies Center and Sawa Lake, Al-Muthanna University, Samawah, Iraq
2 Department of Biology, College of Science, Muthanna University, Samawa, Iraq
AJWEP 2022, 19(4), 105–111; https://doi.org/10.3233/AJW220062
Received: 11 March 2022 | Published online: 17 March 2022
© 2022 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

This study is conducted in order to investigate the trophic state index of Euphrates River flowing through the Samawa city. The present study includes monthly samples collected from three sites (S1: before the Euphrates river enter Samawa center, S2: is located in the Centre of Samawa city, S3: is located at the south of the second site) during the period from April to September, 2020. The study included measurement of some physical and chemical parameters such as Secchi disc, Chlorophyll-a- and total phosphorus. The results showed that TSI (Chl-a) ranging between 4.97-39.39, TSI (SD) ranged between 45.94-81.84, TSI (TP) between 5.81-21.82 and CTSI between 26.18-45.87 with maximum value in September and lowest value in July. The average physiochemical parameters (+-standard deviation) were 7.32 (0.42), 2627.22 (583.94), 5.69 (1.06), 9.5 (3.43), 5.15 (2.05), 1.70 (0.96), 0.57 (0.27), 157.5 (11.69), 1323.88 (259.41), respectively for pH, EC, DO, BOD5, NO3, NO2, PO4, TA, and TDS. Euphrates River is classified as mesotrophic by the CTSI. Statistical analysis showed that positive correlation (p-value 0.01) between the index and (Chl-a-, TP, SD, pH and total alkalinity) while other parameters did not have any correlation with the index. TSI can be used as a baseline for trophic comparisons between the numerous chemical and biological elements of rivers that are connected to trophic status.

Keywords
Carlson’s trophic state index
Secchi disc
total phosphorus
chlorophyll-a
physio-chemical parameters.
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Asian Journal of Water, Environment and Pollution, Electronic ISSN: 1875-8568 Print ISSN: 0972-9860, Published by AccScience Publishing
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