Abstract
In this study, the distribution of chlorophyll-a for phytoplankton was monitored using Geographic Information System (GIS) techniques in selected regions of Iraq represented by the three governorates namely: Salah al-Din (Samarra (1), Baghdad (Al-Muthanna Bridge (2), Al-Utaifi (3), Al-Jadiriya(4), Kut (Al-Aziziyah (5), Al-Zubaydah (6), Al-Numaniyah (7), and Al-Muftah (8)) as human agricultural, and industrial activity rose in these locations. These stations, which are located along the Tigris River, were used as sites for collecting samples. The selection procedure was conducted on a monthly basis between February 2022 and January 2023. Chlorophyll-a measurements for phytoplankton throughout the sampling period varied from 3.7 to 2.59 g/L at stations. The two stations (Al-Utaifi and Al-Zubaydah) had similar values for both seasons, and the five stations in the dry season had values of less than 0.23 g/L. While phytoplankton numbers varied from 40.32 104 to 21.16 104cell/L for stations 3 and 5, respectively, they varied from 72.39 104 to 37.7 104cell/L for stations 6 and 8, respectively, throughout the wet season. In all of the stations and classes of phytoplankton, the amount of chlorophyll dye was approximately equal to the overall density of phytoplankton. The area under study’s predictive maps of chlorophyll-a analysis also revealed changes in the concentration of dye in all stations.
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