Papers by Lahcen Benaabidate
Journal of Water and Land Development
A-study design B-data collection C-statistical analysis D-data interpretation E-manuscript prepar... more A-study design B-data collection C-statistical analysis D-data interpretation E-manuscript preparation F-literature search
Modeling long term response of environmental flow attributes to future climate change in a North African watershed (Bouregreg watershed, Morocco)
Ecohydrology and Hydrobiology, 2022
Abstract Environmental flows are unanimously considered to be one of the most comprehensive indic... more Abstract Environmental flows are unanimously considered to be one of the most comprehensive indicators of the rivers health and their capacities to provide ecosystem goods and services. In this study, the objective was to predict the response of environmental flow components in a typical North African rivers network to future climate change. The study watershed is Bouregreg watershed (BW) in Morocco. To achieve this objective, a hybrid approach was build based on the semi-distributed model Soil and Water Assessment Tool (SWAT) and the Indicators of Hydrologic Alteration program (IHA). Data of two emissions scenarios (RCP4.5 and RCP8.5) from a downscaled Global Circulation Model were used to force the hybrid SWAT-IHA to calculate modifications of BW's environmental flow components in 2085-2100 period. Results showed that BW will experience climatic changes under both scenarios. Most of the environmental flow attributes will be modified within the study period: loss of natural flow variability due to shift in exceedance probability of low flows (up to 40%), decrease of monthly low flows, forward shift in high flow timing (up to 50%), and alteration of both the duration and the rise rates of floods. BW's streams responded unequally to the simulated changes in terms of the altered attributes as well as the degree of the alteration. This study confirmed the ability of the developed modeling approach to monitor environmental flow parameters for the first time in Morocco, and contributed in highlighting the necessity of proactive long term strategies to protect riverine ecosystems in North Africa watersheds.
Caracterisation Geochimiques et Statistique Des Eaux Souterraines Du Perimetres Irriguee Du Tadla (Maroc) Geochemical and Statistical Characterization of Groundwater in Tadla Irrigated Perimeter (Morocco)
Le Journal de l'Eau et de l'Environnement, Dec 31, 2006
RESUME : Dans le perimetre irrigue du Tadla,l’utilisation accrue des ressources en eau souterrain... more RESUME : Dans le perimetre irrigue du Tadla,l’utilisation accrue des ressources en eau souterraine et de surface couplee a l’intensification agricole conduit a la degradation de la qualite de l’eau et du sol par la salinisation generalisee des sols et des nappes phreatiques.Cette etude vise la caracterisation geochimique et statistique des eaux du perimetre irrigue de la plaine du Tadla. Les diagrammes de concentration montre nt que les elements chimiques : sulfate et calcite evoluent de facon incertaine a cause d’une alcalinite residuelle calcite.L’etude statistique met en evidence des similitudes mais aussi des differences significatives entre la composition des deux perimetres irrigues. Dans les deux perimetres le processus de salinisation est le processus majeur.
Etude De La Qualite Metallique Des Eaux Souterraines Situees Au Voisinage Des Eaux Usees Dans Le Bassin Versant Du Moyen Sebou: Maroc Study of the Metallic Quality of Subterranean Waters Situated in the Neighborhood of Waste Water in the Middle Sebou Basin: Morocco
Le Journal de l'Eau et de l'Environnement, Dec 31, 2009
The Mohamed V hospital of Meknes is one of the most important establishments for public health in... more The Mohamed V hospital of Meknes is one of the most important establishments for public health in the entire region of Meknes-Tafilalet; it is also one of the biggest sanitary structures of Morocco. According to the classification of the American Hospital Association (American Hospital Association [AHA], 1986) based on the number of active beds, this hospital belongs to class 7, with a real bed capacity of 531 beds among which 416 are functional, hence this has led to the importance of the study of the impacts of its effluents on the environment. Wastewaters of this hospital contain pollutions of microbiological, chemical, organic, mineral and metallic nature. They are rejected in the sewer system of the city without any preliminary treatment and has a loosened open-air at the level of Aïn Choubbik district where they are reused by the local residents for the irrigation of truck farm, cereal and tree-dwelling farm. Moreover, the major part of these wastewaters is poured into Bourouh river, in particular during pluvial period. Consequently, we may note direct harmful impacts on the health of Man as well as on the environment with its diverse compartments, water (Surface Water and subsoil water), ground and air. Thus, we will try using this present study to evaluate the pollution rate by elements in state of trace, taking a case of heavy metals effluents of the Mohamed V hospital of Meknes and the consequences it could have on the environment and as well as the proposed solutions. So, we are also going to estimate the pollution rate by these elements at the levels of urban wastewaters of the Ain Choubbik district receptacles of the hospital effluents.
The management of the hospital waste constitutes one of the main challenges with which our societ... more The management of the hospital waste constitutes one of the main challenges with which our societies are confronted; but unfortunately, only few researches has been conducted with regards to the management of hospital waste. Most establishments of health especially in the private sector throw their waste in the garbage dumps, which can provoke the contamination of grounds and groundwater sheets. Thus, the sanitary establishments which make the treatment of their waste are rare. A more practiced treatment is the incineration process, of which the consequences are very fatal on the environment if it is made without appropriate filtering: discharge of smokes which is a toxic waste, if not polluting the atmosphere (US EPA: USA-.Environment Protection Agency, 2006). This work is realized on the ground of the Moulay Ismail hospital in Meknes. Before 2006, the waste of this hospital was always treated in open-air burned. This practice which does not correspond to the international standards leads to the formation of the dioxins which are toxic matter, and are harmful to the human health and to the environment. These substances constitute a group including 210 chlorinated tricyclic organic compounds which include dioxins (PCDDs [Polychlorinated dibenzodioxins] / PCDFs [Polychlorinated dibenzofurans]). Thus, we took analyses of the ground of Moulay Ismail hospital in Meknes to look for these substances. In this work, we made use of chromatography in gaseous phase connected to the mass spectrometry (GC/MS); it is the method of choice to identify and quantify PCDD / Fs to the state of tracks in the complex matrices (Eppe et al., 2006). Therefore, the dosage demonstrated the absence of any organic polluting substances.
Currently, Sebou watershed is threatened by an intensive pollution, considering the enormous volu... more Currently, Sebou watershed is threatened by an intensive pollution, considering the enormous volume of dismissals issued from the city of Fez. The total pollution rejected by this city rises up to 100.000 m 3 /day; it will reach 120.000 m 3 /day by 2015 (RADEEF, 2007). The agricultural use of Fez stream and Sebou river wastewaters in the area of Fez is more intense and aims primarily the market gardenings. This use may be accompanied with health hazards for which evaluation requires the well knowledge of physicochemical and microbiological characteristics of this water. Obtained results during this study, indicate that physicochemical and microbiological quality the water used in irrigation, does not fit always with the criteria on conditions of the use of wastewater in agriculture. However, stations located respectively upstream of Fez city and the confluence zone between Fez stream and Sebou river are, slightly susceptible to satisfy the fixed criteria by WHO. Furthermore, irrigation waters of stations located downstream from dismissals of Fez city and downstream from the zone of confluence are highly chemically and bacteriologically polluted, they are characterized by low content in oxygen, large contents in suspended matter, DBO 5 , nitrate, K + , phosphates, and high concentrations in heavy metals such as Cr, Cu and Ni as well as an important presence of fecal coliformes and Streptocoques which exceed the limits fixed by WHO. The protection of this water against various contaminations is necessary and imperative in order that this water continues to be used in agriculture.
River runoff estimation with satellite rainfall in Morocco
Hydrological Sciences Journal-journal Des Sciences Hydrologiques, Feb 17, 2023
Characterization of physicochemical impacts of hospital and urban effluents on the environment, case of Meknes, Morocco
Sciendo eBooks, Jul 13, 2023
Journal of Ecological Engineering, Sep 1, 2022
In order to evaluate the degree of sediment contamination by metallic trace elements in the water... more In order to evaluate the degree of sediment contamination by metallic trace elements in the watershed of Oued Inaouene (North-East of Morocco), samples of surface sediments were taken along the river and at the level of the Idriss 1 st dam. The objective was to obtain thorough knowledge of the environment (metallic element content, organic matter content, granulometry, and pH, EC, CaCO 3 content) in order to identify the degree of pollution in these sediments. The results of analysis have highlighted a contamination accentuated by Ba, Sr, P, Cu, Pb, In fact, this element is present at very high levels, with a maximum content ppm for the samples taken upstream of Oued Inaouene. This increase is related to the physicochemical conditions of the environment, despite the diversity of sources of pollutants. The analysis of hazardous heavy metals showed the values under the detection limits. The qualitative study allowed to identifying the source of contamination, it is an anthropogenic source related to the discharges of cities in vicinity of Oued Inaouene, and natural considered as the main source of pollution by trace elements of sediments that constitute an important reserve of pollutants in the environment
Arabian Journal of Geosciences, Oct 1, 2020
The study of the influence of climate change on the evolution of floods in areas under the influe... more The study of the influence of climate change on the evolution of floods in areas under the influence of a Mediterranean climate is very important. This work aims to provide new analytical elements to decision-makers in flood management and forecasting in three Mediterranean catchments (Lonquen, Evrotas, and Azzaba), in order to better understand their hydrological behavior and to quantify the flow and its vulnerability to climate change. A semi-distributed conceptual model (HBV-A model) was used to simulate flows with a daily time step. The model results (simulated flows) were used to examine the evolution of high flows using two different approaches (linear regressions and statistical test). The Chilean and the Greece catchments show a decrease in flooding. However, the Moroccan catchment reacts differently, since a positive trend in high flows is observed. The overall results confirm the influence of climate change on the rainfall/runoff relationship.
Revue Nature et Technologie, Feb 25, 2015
Les eaux résiduaires urbaines de la ville de Meknès constituent un réceptacle des effluents prove... more Les eaux résiduaires urbaines de la ville de Meknès constituent un réceptacle des effluents provenant des activités diverses, entre autres industrielles, hospitalières, agricoles … etc ; et ceci sans aucun traitement préalable. L'hôpital Mohammed V est l'un des plus importants établissements de santé publique à avoir des impacts sur ces eaux ; ses effluents sont déversés directement sans aucun traitement préalable dans le réseau d'assainissement de la ville et dégagés à ciel ouvert au niveau du quartier Ain Choubbik. C'est un hôpital très important à l'échelle régionale aussi bien que nationale ; il appartient à la classe 7 selon la classification de l'American Hospital Association [1] reposant sur le nombre de lits actifs, sa capacité litière est de l'ordre de 531 lits dont 416 sont fonctionnels ; d'où l'importance de le choisir comme modèle dans cette étude. L'objectif de cette recherche est de caractériser la pollution bactériologique des effluents de cet hôpital, estimer son intensité en la comparant avec celle d'autres effluents hospitaliers étudiés antérieurement, et puis avec celle des effluents urbains d'Ain Choubbik en vue d'estimer ses impacts sur ceux-ci. En effet les paramètres bactériologiques mesurés et comparés en deux stations : le regard principal des effluents de l'hôpital Mohamed V de Meknès et les eaux usées urbaines de Aïn Choubbik montrent que le taux de certaines espèces bactériennes dans celles-ci est très élevé par rapport aux effluents hospitaliers, il s'agit des coliformes totaux, coliformes fécaux et streptocoques fécaux ; pour d'autres espèces telles que les spores du clostridium, les germes totaux et les staphylocoques, leur concentration dans l'effluent de l'hôpital Mohamed V de Meknès est plutôt plus élevée par rapport à celle de l'effluent urbain de Aïn Choubbik.
Environnement, ingénierie & développement, 2009
Dans le but, d'évaluer les paramètres physico-chimiques du lixiviat de la décharge publique de la... more Dans le but, d'évaluer les paramètres physico-chimiques du lixiviat de la décharge publique de la ville de Sefrou et son impact sur l'environnement (eaux souterraines, de surface, air atmosphérique…), des prélèvements bisannuels (saison estivale et hivernale) ont été effectués et ont été analysés. Les résultats obtenus ont montré une forte dégradation de la qualité physico-chimique des lixiviats : faibles teneurs en oxygène, valeurs élevées de la conductivité électrique et des concentrations en Chlore, Sulfates, Nitrates, Nitrites, Mg 2+ , Ca 2+ , DBO 5 , DCO, Zn, Cu, Fe et Ni. La forte charge en matière organique et la présence des éléments métalliques montrent que les ordures ménagères contiennent des déchets industriels. Les concentrations dépassent les normes de rejets (OMS 2000), ce qui constitue un danger potentiel pour l'environnement et la santé des populations de la ville de Sefrou. La variation des paramètres physico-chimiques est régie par des facteurs hydrogéologiques et climatiques. Le traitement des lixiviats avant leur rejet dans l'environnement semble donc nécessaire.
Diagnostic of physicochemical and bacteriological quality of fez wastewaters rejected in Sebou River: Morocco
Environmental Earth Sciences, Oct 12, 2010
Abstract The high demographic growth of the city of Fez, as well as the implantation of social di... more Abstract The high demographic growth of the city of Fez, as well as the implantation of social districts in the periphery of the city, is leading to the deterioration of water quality of the Sebou River. This critical situation has considerable effects on the environment of Fez, where ...
Desalination and Water Treatment, Jul 15, 2015
This work aims to evaluate the hydrochemical characteristics of a shallow aquifer located between... more This work aims to evaluate the hydrochemical characteristics of a shallow aquifer located between carbonated formations and salt lake in the Chemora region in northeastern Algeria. Hydrochemical, multivariate statistical, and the thermodynamics techniques were used to investigate the hydrochemical evolution within the aquifer. Twenty-five water samples were collected during May 2013 in this the aquifer wells. The results indicate that this shallow water is characterized by sulfate-dominant facies representing about 64% of cases, followed by the chloride with 24%, and the remaining (12%) is represented by the bicarbonate facies. The sulfate facies is acquired mainly by the alteration of pyrite. The saturation index showed that all carbonate minerals are supersaturated and all evaporate minerals are undersaturated which suggest that their soluble component Na + , Cl − , Ca 2+ , and SO 2À 4 concentrations are not limited by mineral equilibrium. The application of the cluster analysis and the principal components analysis based on major ion contents defined 3 main chemical water types reflecting different hydrochemical processes with salinity increases along the groundwater flow.
RESEARCH ARTICLE Monitoring of heavy metals in the sediments of the Inaouene River, Morocco
The watercourse of the Inaouene River carries all the solid waste disposals from the urban areas ... more The watercourse of the Inaouene River carries all the solid waste disposals from the urban areas (City of Taza, Bab marzouka, oued Amlil, Bouhlou). It also receives wastewater which is not treated at the sources. This wastewater contains various types of heavy metals. The study of heavy metal contents in the sediments was carried out at 11 sampling sites alongside the Inaouene River and some of its principal tributaries in May 2008 and October 2009. The results can be classified into three series: the series 1: including the metals (Fe, Sr, Mn, Zn, Rb, Pb) detected on all the sampled sites, the series 2: including the metals (Cu, Ni, Cr, As, Co, Pt, Sn) detected only some sites, the series 3: including hazardous metals (Ag, Cd, Hg) which were under the limit of detection. The correlation analyses of heavy metal contents of two study periods indicated that a large part of examined heavy metals had common sources and behaved similarly during the transportation.
Impact of urban wastewaters on groundwater quality in the watershed of Middle Sebou (Morocco)
The study has been carried out in November 2007 and July 2008 on eight wells located in the vicin... more The study has been carried out in November 2007 and July 2008 on eight wells located in the vicinity of Fez stream and Sebou River which waters are polluted from discharges issued from the urban area of Fez city. The obtained results showed important concentrations in ...
European Scientific Journal, ESJ, Dec 31, 2013
The effluents of the Mohamed V hospital of Meknes include strong polluting factors harmful to env... more The effluents of the Mohamed V hospital of Meknes include strong polluting factors harmful to environment and to human health, notably important bacterial load. This hospital has not a pretreatment station so it rejects its effluents in the urban sewer system without any preliminary treatment. The urban effluents are cleared open air at the level of the Aïn Choubbik district and poured into Bourouh river notably during pluvial period; consequently they cause a physicochemical and biological deterioration of the aquatic ecosystem. To reduce their negative impacts, several treatment techniques are operated. The chemical coagulation and the biological treatments are techniques used particularly for the treatment of various types of effluents. Their inconveniences it is because they cause an acidification of treated water and a production of important quantities of muck. The electrocoagulation is a very interesting alternative to these techniques. The present job registers as part of research works which have as objective to study the effects of this technique on wastewaters of the Mohamed V hospital of Meknes. This is the way how we studied experimentally the treatment of the hospital effluents by the means of the electrocoagulation by using iron electrodes. To determine the optimal conditions of treatment of these effluents, we made several experiments by varying every time the intensity of current and time of retention. The obtained rates of reduction are
International journal of innovation and scientific research, Jan 2, 2015
This study aims to quantify the pollution levels in the main Lakes of El Kala National Park; Mell... more This study aims to quantify the pollution levels in the main Lakes of El Kala National Park; Mellah, Oubeira, and Tonga, which constitute an important source of water supply and a National Heritage according to Ramsar convention, by monitoring five heavy metals (Al, Cr, Zn, Cu, Pb) and the phosphates content. This park contains up to 33% of the population of El Kala district, which liquid wastes are discharged directly in the lakes ecosystem. Results revealed that the Aluminum is present in the three Lakes, Lead was detected in the lakes of Oubeira and Mellah, Zinc and Cr were inexistent in the three lakes, Copper was detected only in Oubeira Lake. Phosphates were present in three lakes with a maximal content of 6 mg/l. This value remains superior to the limit content of phosphates for a lake eutrophication (0.2 mg/l). This situation threatens seriously the Lakes water quality and then its ecosystem.
Management Strategies of Water Resources in the Arid Zone of South-Eastern Morocco
Springer eBooks, Aug 13, 2008
The Errachidia basin is located in the South Eastern part of Morocco and character-ised by its ty... more The Errachidia basin is located in the South Eastern part of Morocco and character-ised by its typical arid climate. With an average rainfall of under 80 mm/year, the potential of water resources are very low in this part of the country. Because of its highly growing population, water is ...
Uploads
Papers by Lahcen Benaabidate