Characterization of the mineralization of the Groundwater in high Basin of Guir (Morocco) by geochemical and geostatistical (original) (raw)
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A STUDY ON GROUNDWATER GEOCHEMISTRY AND METALLIC PROPERTIES IN THE GUIR BASIN (EASTERN MOROCCO
The management and conservation of groundwater of Talssint (watershed of the guir basin), requires a principal components analysis (PCA) of ten physico-chemical parameters. The results visualization showed that Na+, Ca2+ and Mg2+ are positively correlated to the F1 axis, unlike conductivity; pH and K+ which are associated with this axis negatively. The application of the main component analysis to these results shows that we have two groups of wells, a first group of wells in the positive part of the F1 axis, characterized by water with high (Na+, Ca2+, Mg2+), at well P1 and P2 and a second group of wells in the negative part of axis F1, characterized by water with high K+ concentration and high electrical conductivity at wells P3 and P4. This enrichment of chemical elements should be related to the geological contexts of the region.
IAEME, 2019
A hydrogeochemical study was conducted in the Middle Ouerrha, Taounate, Morocco, to identify the mechanisms responsible for the chemical compositions of the shallow groundwater and to document water quality. Different physicochemical parameters are determined, and correlation were used to reveal the hydrogeochemical characteristics of the shallow groundwater, and the potential water-rock interactions. Groundwater samples were collected from a natural source and two wells. Unfortunately, the groundwater of Taounate district have know the problem of salinity, which threatens their quality. In the Hammam source were characterized by high levels of salinity. The temperature, pH, electrical conductivity, salinity, Ca, Mg, Cl, SO 4 , K, NO 3 , Na and HCO 3 were determined. The predominant mechanism controlling groundwater chemistry proved to be the dissolution of carbonates, salt red marls and gypsum. The purpose of this study was to identify salinity water sources and quantitatively analyze their composition using comprehensive hydrogeochemical determinations. This approach facilitates important decision making for water salinity disaster control, and quickly and accurately solves the fuzzy and uncertain characteristics of water quality. In addition, the method also can be used at various scales for water resources development, regional water resource evaluations, and environmental assessment.
Hydrogeochemical Study of Groundwater Quality in the West of Sidi Allal Tazi, Gharb area, Morocco
Journal of Materials and Environmental Sciences, 2018
Groundwater is the world's largest and most reliable source of freshwater, with nearly 80% of global inhabitants relying on it as a source of drinking water [1]. It is an essential source for domestic, industrial and agricultural activities. However, it is threatened with pollution and pure water is not available everywhere. Even the storage and availability of fresh water are not always secured. Also, the majority of irrigation and drinking water resources do not always conform to the international quality standards. This probably signifies the presence of anthropogenic or geochemical contamination. There are many reports worldwide indicating the contamination of groundwater or that it becomes at risk of contamination [2]. Failure to minimize water contamination can result in severe adverse effects on human health, animal and agriculture. Most diseases in human beings are caused by polluted water. Knowledge of hydrogeochemistry is a key to determining the origin of the chemical composition of groundwater, the interaction between water and rock and the process of groundwater flow [3 , 4]. Groundwater quality is naturally linked to the chemical properties of the aquifer's geology through which it flows. Thus, there is spatial variability in the quality of groundwater from one aquifer to another. Geology is not the only factor determining groundwater quality; anthropogenic factors also play an important role [5-7].
The Rharb hydrogeological basin, of which our study area is part, is one of the main sources of drinking water and irrigation for a large part of northern Morocco. The groundwater of the Rharb basin is characterized by its poor quality, which may be related to its high mineralization. In order to characterize these features, we have applied an approach that relies on the compilation of hydrochemical parameters, hydrogeological drilling, and geophysical data (VES and well logs). The main objective of this work is to highlight some of the features in the geometry of the quaternary deposits and identify the origin of the groundwater mineralization as well as study its spatial variability. The obtained results showed that the geometry of the Amirian bedrock is mainly constituted by two depressions separated by NW-SE and NE-SW trending faults. The main chemical facies of the groundwater are a mixture of calcium and magnesium sulfate chloride facies and chloride-sodium facies. The origin of this mineralization is related to reverse ion exchange processes, halite and gypsum dissolution, in addition to the processes of evaporation-crystallization and water-rock interaction under geological conditions that favor residence time. Such results open up new perspectives for the sustainable management of this important hydrogeological groundwater area.
Assessement of the Physico-Chemical Quality of Groundwater in the Sidi Yahya Region, Gharb, Morocco
2019
Groundwater is the most important natural resource which cannot be optimally used and sustained unless its quality is properly assessed. The aim of this work is to study the physico-chemical quality of groundwater in the water table of the Sidi Yahya region (Gharb, Morocco). We have carried out a qualitative study of the water in different sites of the irrigated perimeter of Sidi Yahya. In fact several measurements (pH and groundwater depth) and laboratory analysis (ionic balance) were conducted to determine the physico-chemical characteristics of water. We prospected 33 wells distributed into 6 zones: A, B, C, D, E, and F. Data were statistically analyzed using the analysis of variance (ANOVA). The results showed that the depth of water table varied between 6 and 96 m and that 51.5% of the wells were highly to extremely saline, thus inadequate for irrigation. The studied zones do not have the same salinity level. In fact, the B and F zones represent a significantly higher salinity ...
Groundwater in Morocco is restricted because of the semiarid to arid climatic conditions. In this area, the water resources, especially groundwater, are extremely significant. However, it is under threat from organic and inorganic pollution. Furthermore, it is considered the only source of potable water as well as having different usages in Zagora (the southeast of Morocco), making its quantitative and qualitative protection an urgent priority. The present study focused mainly on the anthropogenic impact on the natural resources and groundwater quality around Zagora city by using geospatial techniques and the Water Quality Index (WQI). This paper uses sampling data from 15 wells in the water table of Oasis Fezouata. 15 samples were collected from wells during rainy and dry seasons in two years 2020-2021 and the analysis of the groundwater quality of studied stations. The suitability of the aquifer Fezouata was investigated using drinking and irrigation water quality indices like SSP...
Quality of Groundwaters of the Rural District EL Ganzra (Province of Khemisset, Morocco)
International Journal of Engineering Sciences & Research Technology, 2014
The study of groundwater quality in the rural commune of EL GANZRA by agricultural excellence is of importance for the use of groundwater for various activities (drinking, irrigation, patenting ...) to do a follow-up of several physicochemical tracers. there was held samples of 19 wells spread throughout the area concerned. Results emit conductivity and salinity highlighting the role of the effect on the geological nature of the water quality and that a change in MES and COT which confirms the presence of natural organic matter origin (productivity) or anthropogenic (human). The DBO5/DCO ratio is about 0.3 can be concluded that the water from these wells are quite loaded with poorly biodegradable inorganic components. For nitrates values are noted below the WHO standard allowable, except P19 in which there is a high value of 33mg / l which is probably due to agricultural activity characterized by the use of fertilizers.
SN Applied Sciences
The aim of this present study was to evaluate groundwater quality in the upstream part of the Essaouira basin. A detailed geochemical study of groundwater region is described, and the origin of the chemical composition of groundwater has been qualitatively evaluated, using multivariate statistical methods (PCA, HCA), and Water Quality Index (WQI) was used to determine the suitability of water for drinking. To attempt this investigation, 38 samples were analysed for various physicochemical parameters such as temperature, pH, TDS, Na, NO 3 , K, Ca, HCO 3 , Cl, Mg, and SO 4. The results obtained showed that the facies characterizing the study area was a combination of Ca-SO 4 and mixed Ca-Mg-Cl. Hydrochemical approach based on the bivariate diagrams of major ions indicates that the origins of groundwater mineralization are the result of (I) evaporite dissolution; (II) cation-exchange reactions; and (III) evaporation processes. The WQI values range from 82.3 to 390.9, and therefore the water samples can be categorized into five groups: excellent water to water unsuitable for drinking. In global, 61% of the groundwater sampled had poor water quality, 18% were very poor water quality, 16% are unsuitable for drinking, and just 6% represent a good quality. However, the results of this paper indicate that most water is not safe for drinking and needs further treatment.
Materials Today: Proceedings, 2019
This paper reports results of a physico-chimical study of groundwater in in high Basin of Guir (Eastern High Atlas, Morocco). The water quality data was monitored at ten different wells and springs using 12 water quality parameters (Biochemical oxygen demand (DBO 5), chemical oxygen demand (DCO), Sulfate (SO4 2-) while the factor 2 is related to mineral salts (Cland SO42-). The typological structure of the plan analysis F1 x F2 shows four areas depending on the nature of salt pollutants. The contamination observed for the majority of stations could be related to domestic, fertilizers and geological sources of pollution.
Mapping of groundwater quality in the Turonian aquifer of Oum Er-Rabia Basin, Morocco: a case study
Environmental Geology, 2006
This study takes the groundwater of the Moroccan limestone aquifer of Oum Er-Rabia as an example of statistical and cartographical approaches in water resources management. Statistical analyses based on frequency distribution and PCA methods revealed the homogeneity of waters with the existence of abnormal points and have helped to assess correlations between the studied variables. The mapping approach illustrated that waters are influenced by the lithology of the surrounding rocks and are of Ca-Mg-HCO 3 , Ca-Mg-Cl-SO 4 , and mixed types according to the Piper classification. The quality of water is of high to medium, north of the basin, but it is of medium to bad, NE and south, due to excessive contents of chloride, sulfate and nitrate. According to the US Salinity Laboratory classification, water used for irrigation in the eastern and the southern parts of the basin should take into consideration the drainage conditions, the nature of plants and the addition of gypsum doses.