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Monitoring of Physicochemical and Microbiological Quality of Taghazout Seawater (Southwest of Morocco): Impact of the New Tourist Resort "Taghazout Bay"

Lamine Imane, Alla Aicha Ait, Bourouache Mohamed, Moukrim Abdellatif

Journal of Ecological Engineering

2019

Vol. 20, nr 7

79--89

The marine environment plays a major socio-economic role in the Agadir region (south-west Morocco). This area, which hosts important fishery resources, is currently not spared from the pollutants produced in the course of agricultural, domestic, industrial and tourist development. The aim of this study is to assess the impact of the Taghazout bay tourist resort on the bacteriological and physicochemical quality of the coastal waters of Taghazout. The seawater samples were collected between March 2016 and March 2018 at three sampling sites (S1, S2 and S3) in order to monitor the concentrations of fecal coliforms (FC), fecal streptococci (FS) and total germs (TG). The results of physicochemical parameters show seasonal fluctuations influenced by climatic factors. The spatio-temporal monitoring of the bacteriological parameters shows that the average total germ count is 127.05 CFU/100 ml, 39.61 CFU/100 ml for fecal coliforms and 15.21 CFU/100 ml for fecal streptococci. The values of FC80, FC95 and FS90 do not exceed the guide values of the Moroccan standards. This classifies the Taghazout beach in category A (good quality of bathing water). The monitoring analysis recorded by the Pearson correlation test between the environmental parameters and the level of fecal bacteria showed that there was a significant positive correlation between the FC concentrations and rainfall; the FS concentrations showed significant positive correlations with all the environmental parameters while the TG concentrations indicate no correlation with them. The fecal contamination parameters should be routinely monitored for improving the environmental conditions of coastal cities. This must be the case for the Taghazout coastline where a regular monitoring program must be established to evaluate the impact of the new tourist resort “Taghazout bay” on the environmental quality of this ecosystem.

Bakterie "sanitarne" w próbkach wody pochodzącej z jeziora Syrenie Stawy

Nahurska A., Deptuła W., Stosik M.

Chemia i Inżynieria Ekologiczna

2003

Vol. 10, nr S1

109-114

Przedstawiono ocenę stanu sanitarnego małego jeziora położonego w obrębie miasta Szczecina Syrenie Stawy. Wodę do badań pobierano z czterech punktów wyznaczonych na podstawie analizy terenu i wywiadu środowiskowego. W próbach wody oznaczano: miano i najbardziej prawdopodobną liczbę (NPL) bakterii grupy coli, miano i NPL bakterii grupy coli typu kałowego, NPL paciorkowców kałowych oraz liczbę kolonii bakterii w 1 cm3 badanej próbki na agarze odżywczym po 72 godz. inkubacji w temp. 20°C i liczbę kolonii bakterii w 1 cm3 badanej próbki na agarze odżywczym po 24 godz. inkubacji w temp. 37°C. Na miejscu mierzono również temperaturę wody i powietrza. Analizując otrzymane wyniki, należy stwierdzić, że w badanym okresie wystąpiły wahania wszystkich parametrów, z tym że największe zmiany dotyczyły miana i NPL bakterii grupy coli.

Sanitary condition of a small lake - Syrenie Stawy was evaluated, situated within the town of Szczecin. Water for the studies was sampled from four sites, selected on grounds of analysis of the area as well as of an environmental interview. In the water sampIes, titre and the most probable number (MPN) of coli group bacteria, titre and MPN of fecal type coli group bacteria, MPN of fecal streptococci and total number of bacteria on broth-agar after 72 h incubation at 20°C (TVC 20°C), total number of bacteria on broth-agar after 24 h incubation at 37°C (TVC 37°C) were determined. On the spot, water and air temperature were also measured. Analysis of the obtained results demonstrated in the studied period alterations in all parameters including the most pronounced ones in the titre and NPL of coli group bacteria.