TY - JOUR N2 - This work describes the behaviour of organic pollutants along the wadi Mouillah watercourse and its main tributaries and their impacts on the Hammam Boughrara dam, located in the NW of Algeria, in the Wilaya of Tlemcen. The use of a database relating to physico-chemical, biotic and hydrological variables, covering the period from January 2006 to December 2009, contributed to the understanding of the spatiotemporal evolution of each variable. The application of a mathematical model of the diffusion by convection-dispersion with a reaction on two characteristic parameters of organic pollution, the biochemical oxygen demand (BOD 5) which records values above the norm, with peaks that can reach 614%, and total phosphorus (P tot), which the concentration is always higher with maxima reaching 53 mg∙dm –3 favouring eutrophication; this made it possible with precision to synthesise the propagation of pollutants in the liquid mass. The results obtained on the waters of Wadi Mouillah are therefore of poor quality; there is a need to set up a rigorous water quality monitoring system, with water treatment and decontamination devices to preserve the water resources. This will allow to contribute to better management of water quality in terms of combating the spread of pollution. Therefore, they can be used to support decisions in the context of sustainable development. L1 - http://journals.pan.pl/Content/124430/PDF/2022-01-JWLD-04.pdf L2 - http://journals.pan.pl/Content/124430 PY - 2022 IS - No 54 EP - 37 DO - 10.24425/jwld.2022.141552 KW - biochemical oxygen demand (BOD5) KW - diffusion KW - Hammam Boughrara dam KW - mathematical modelling KW - pollution KW - total phosphorus KW - wadi Mouillah A1 - Benadda, Lotfi A1 - Djelita, Belkheir A1 - Chiboub-Fellah, Abdelghani PB - Polish Academy of Sciences; Institute of Technology and Life Sciences - National Research Institute DA - 2022.09.28 T1 - Mathematical modelling by convection-diffusion with reaction of organic pollution in the wadi Mouillah stream north-western Algeria SP - 26 UR - http://journals.pan.pl/dlibra/publication/edition/124430 T2 - Journal of Water and Land Development ER -