@article{MAKHILLJEAS2020152119484,
    title = {Diurnal Variation of Total Count for Algae and Chlorophyll and Relation with Physical and
Chemical Parameters of Euphrates River/North-Western of Baghdad},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {15},
    number = {21},
    pages = {3640-3647},
    year = {2020},
    issn = {1816-949x},
    doi = {jeasci.2020.3640.3647},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2020.3640.3647},
    author = {Amin Abooud},
    keywords = {Bacillariophyceae,Chlorophyceae,Caanophyceae,Alagae,chemical properties},
    abstract = {The current study included some physical and
chemical properties at one location in the Euphrates
River/North-Western of Baghdad and its relationship to
the total count of algae and chlorophyll concentration to
identify daily changes. The physical and chemical
properties included the estimation of the temperature of
air and water which was characterized by the height
during the daytime and the decrease during the night,
ranging between (17-26)<sup>&#9675;</sup>C for air and (17-19)<sup>&#9675;</sup>C for
water. The values of the pH tended to the alkalinity by
registering values above (7) and no daily changes appear
clear. The electrical conductivity was the highest value
(1310) &#956;S cm<sup>&#150;1</sup> and the lowest (743) &#956;S cm<sup>&#150;1</sup>. The
salinity values followed the values of electrical
conductivity and ranged from (0.42-0.81)<sup>&#9675;</sup>. CO<sub>2</sub>
concentrations ranged from 1.51-3.62 mg L<sup>&#150;1</sup> while total
acidity reached values ranging from (755-6481) mg L<sup>&#150;1</sup>
and total alkalinity (214-367) mg L<sup>&#150;1</sup>. The results showed
that there was no apparent decrease in the concentration
of dissolved oxygen at the study site and did not reach
complete depletion in station with the lowest
concentration of dissolved oxygen in water (5.8) mg L<sup>&#150;1</sup>
and highest (7.8) mg L<sup>&#150;1</sup>. Plant nutrient ranged from
(0.004-0.077) &#956;g of nitrogen atom-nitrite/L while
phosphate concentrations ranged (0.64-4.10) &#956;g of
phosphorus atom-phosphate/L and silica concentrations
reached between (189-412) &#956;g of silicon atom-silicate/L.
(35) species of algae belong to (31) genus which the
class in clued Bacillariophyceae, Cyanophyceae,
Chlorophyceae, Euglenophyceae and Pyrrophyeae. As for
the quantitative study, the total count of algae in the
Euphrates river for samples studied ranged from (76&timesmn;10<sup>3</sup>)
cell/L and (475&timesmn;10<sup>3</sup>) cell/L. Chlorophyll concentration
was estimated in the river and the concentrations ranged
from (5.43) &#956;g chlorophyll-a/L at (16) o&#146;clock and
(0.91) &#956;g chlorophyll-a/L at (24) o&#146;clock.}
    }