CONTRIBUTION A L’EVALUATION DE LA QUALITE PHYSICO-CHIMIQUE DU COURS D’EAU MERZEG (PERIURBAIN DE CASABLANCA, MAROC)
Journal Title: Larhyss Journal - Year 2014, Vol 18, Issue 18
Abstract
Morocco’s water resources are facing quantity and quality problems. Limited resources due largely to a semi-arid and arid climate and also to the significant deterioration in the quality grounded by different pollutants. Casablanca city (Morocco's economic capital) is one of Morocco’s parts that best illustrates these phenomena. It shows a considerable increase of the population and continuous development of industrial activities especially in the suburban area. Rivers of this area who suffer the most are the effects of these pressures, what makes compromised of their uses. Merzeg river and their tributary oued Sierni were chosen to illustrate the above impacts. These hydrosystems receive water from the waste water plant (WWTP) of the city of Berrechid as well as the release of the industrial area of Had Soualem. A companion of 14 months was conducted in order to determine the physicochemical water quality in 7 sampling stations chosen along these hydrosystems. The findings highlighted the extreme high organic load at the level of the Merzeg river and their tributary Oued Sierni as evidenced by the values of the main parameters: BOD5, COD, Ammonium, orthophosphate and total phosphorus.The waters of study stations can be described as bad to very bad. Significant mineralization was highlighted at the level of this stream. This would result from the combined effect of the degradation of the coastal chaouia groundwater and the mineral load of wastewater. The follow-up of the spatio-temporal evolution of organic pollution index “OPI†shows the polluting waters in the stations receiving releases of the STEP of Berrechid and also Had Soualem. The results of the principal component analysis (PCA) have highlighted two gradients. The first reflects the degree of pollution and eutrophication, while the second describes the mineralization of waters and seasonality. Moreover, this PCA allowed discriminating against stations according to their physicochemical data.
Authors and Affiliations
MOUNJID J. | Laboratoire d’Ecologie et d’Environnement, Faculté des Sciences Ben M’Sik – Casablanca, Laboratoire de Microbiologie et Sécurité Sanitaire des Produits et de l’Environnement, Institut Pasteur du Maroc, COHEN N. | Laboratoire de Microbiologie et Sécurité Sanitaire des Produits et de l’Environnement, Institut Pasteur du Maroc, FADLAOUI S. | Laboratoire d’Ecologie et d’Environnement, Faculté des Sciences Ben M’Sik – Casablanca, BELHOUARI A. | Laboratoire d’Ecologie et d’Environnement, Faculté des Sciences Ben M’Sik – Casablanca, OUBRAIM S. | Laboratoire d’Ecologie et d’Environnement, Faculté des Sciences Ben M’Sik – Casablanca
Keywords
Related Articles
- EP ID EP15075
- DOI -
- Views 338
- Downloads 14
CARACTERISATION HYDROGEOCHIMIQUE ET MICROBIOLOGIQUE DES EAUX SOUTERRAINES DANS LE SYSTEME D’AQUIFERES MULTI COUCHE DE LA REGION DE POINTE-NOIRE EN REPUBLIQUE DU CONGO
To evaluate the groundwater of Pointe-Noire for human use, it was necessary to determinate the various parameters influencing the quality of water of the coastal sedimentary basin. Their physicochemical elements were f...
ANALYSE DE LA PRODUCTIVITÉ DES AQUIFÈRES FISSURÉS DE LA RÉGION DU N’ZI-COMOÉ (CENTRE-EST DE LA CÔTE D’IVOIRE)
This study relates to the analysis of the productivity of the fractured aquifers in the area of N’zi-Comoé (Center-East of Ivory Coast). It is based on an approach which takes into account the hydrological balance a...
SOIL SALINITY MAPPING IN THE IRRIGATED PERIMETER ZELBA OF THE REGION OF MAHDIA (TUNISIAN SAHEL)
In the region of Mahdia (Eastern Tunisia) perimeters are irrigated using saline waters coming from groundwater and deep aquifers. Consequences are therefore progressive soils salinization. In this context, this work wa...
BRINGING STATISTICAL TECHNICS TO THE STUDY OF THE CLIMATE VARIABILITY : CASEOF TADLA-AZILAL BASIN
Rainfall has varied considerably over the last few decades resulting in droughts and floods. The occurrence of these extreme events implies a potential change in the stationarity of climate regime. The aim of this stud...
DIAGNOSTIC DES PRATIQUES D’IRRIGATION LOCALISEE SOUTERRAINE EN TUNISIE EFFET SUR LA VARIATION DU STOCK EN EAU DU SOL, LE RENDEMENT D’UNE CULTURE DE MAÃS ET L’EFFICIENCE DE L'UTILISATION DE L'EAU
Despite there’re many researches have been conducted in subsurface drip irrigation (SDI), local information on the response of corn growth and water dynamics with SDI is very limited in Tunisia. As in many parts of t...