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- Title
Spatial and Temporal Analysis of Nitrate Dynamics along the Tigris River.
- Authors
Al Lami, Muwafaq H.
- Abstract
Given the wide dependency on surface water used to supply drinking water, agricultural irrigation, and industrial activities, nitrate pollution has posed a serious concern in the Tigris River in recent years. The main objective of this study was to develop an understanding of the spatiotemporal patterns of nitrate distribution in the Tigris River through an integrated approach using hydrological data, physicochemical parameters, and model-based analysis. Eighty-four monthly sampling campaigns from forty monitoring locations along the Tigris River were carried out from January 2011 to December 2018. Obtained results demonstrated that the dynamics were strongly correlated with the length of transport the accumulation processes of and promoted a concentration effect. High distance and flow rates along the river system (p < 0.05). High flow rates in the upper courses of the river system favored physical transport of and promoted a dilution effect. However, low flow rates in the lower sections favored JWMM concentration of 7.0±1.96 g m-3 was observed in February 2018 downstream in the river. No significant seasonal effect in concentrations were observed. These results were supported by the changes in dissolved oxygen concentration and pH in the river system and indicated high nitrification rates and elevated accumulation, particularly downstream in the river. This modeling approach has also confirmed field observations of dynamics with 65% of the variances in the river system being explained by the model.
- Subjects
TIGRIS River; NITRATES &; the environment; IRRIGATION; HYDROLOGICAL databases; NITRIFICATION; WATERSHEDS
- Publication
Journal of Water Management Modeling, 2023, p1
- ISSN
2292-6062
- Publication type
Article
- DOI
10.14796/JWMM.C503