Anthropogenic Activities Impact on the Physicochemical and Bacteriological Quality of Water in Dayat Roumi Lake, Morocco

• Autorzy: Ihsane Ougrad , Zahra Elassassi , Imad Allali , Mohammed Elbouch , Abdeslam Abid , Mohamed Fadli

Identyfikatory

DOI

10.12912/27197050/150561

• Języki publikacji: EN

Abstrakty

EN

Dayat Roumi Lake, a vast body of permanent and shallow water in Morocco, is exposed to urban, tourist, and agricultural constraints. This human intervention can lead to microbial pollution of the lake ecosystem, hence the need to assess this contamination. For this reason, we undertook in this study an evaluation of the microbiological quality of the lake’s water. Thus, seasonal water samples were taken at eight selected stations, taking into account the reception sites of the tributaries and anthropic activities. The parameters determined were: temperature, pH, dissolved oxygen (DO), electrical conductivity, biological oxygen demand (BOD), chemical oxygen demand (COD), ammonium, nitrates, orthophosphates, total phosphate, total coliforms, fecal coliforms and fecal streptococci. The results reveal: (1) A high water conductivity exceeding the admissible value recommended by the Moroccan standard; (2) A significant presence of coliforms and fecal streptococci, in dry periods, exceeding the standards set by the WHO, which could be attributed to a summer temperature favorable to the development of coliforms. This fecal contamination leads to an increased consumption of dissolved oxygen (high BOD and low DO values) explaining the fish mortality in this period of the year; (3) The principal component analysis identified the sources of water quality degradation as domestic sewage, agricultural run-off, domestic waste, and human and animal excreta; (4) The hierarchical analysis divided the sampling stations into three different clusters. The results of the microbiological quality index classified the waters from not to highly polluted. Station 4 was classified as the most polluted site. The results of the COD/BOD ratio showed a spatial and temporal heterogeneity of the biodegradability of the oxidizable matter present in the lake waters.

Słowa kluczowe

EN

bacteriological quality; Dayat Roumi Lake; physicochemical parameter; organic pollution; water; fecal contamination

• Wydawca: Lubelski Oddział Polskiego Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology ; WNGB Wydawnictwo Naukowe
• Czasopismo: Ecological Engineering & Environmental Technology
• Rocznik: 2022
• Tom: Vol. 23, iss. 4
• Strony: 162--172
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Ihsane Ougrad

• Laboratory of Plant, Animal and Agro-industry Productions, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco

• https://orcid.org/0000-0001-5121-6803

autor

Zahra Elassassi

• Organic chemistry, Catalysis and Environment, Department of Chemistry, Faculty of Science, Ibn Tofail University, Morocco

• https://orcid.org/0000-0002-2889-4494

autor

Imad Allali

• Laboratory of Plant, Animal and Agro-industry Productions, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco

• https://orcid.org/0000-0002-2733-9747

autor

Mohammed Elbouch

• National Laboratory of Studies and Monitoring of Pollution, Rabat, Morocco

• https://orcid.org/0000-0001-9857-5408

autor

Abdeslam Abid

• Research Laboratory in Applied and Marine Geosciences, Geotechnics and Georisk, Faculty of Sciences of Tetouan, Abdelmalek Essaadi University, Morocco

• https://orcid.org/0000-0002-1679-5309

autor

Mohamed Fadli

• Laboratory of Plant, Animal and Agro-industry Productions, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco

• https://orcid.org/0000-0003-4864-7965

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