Ecological Engineering & Environmental Technology, Dec 31, 2023
This paper illustrates the importance of integrating buried stormwater ponds into underground dev... more This paper illustrates the importance of integrating buried stormwater ponds into underground development plans using a multi-criteria analysis and modeling for the selection of support in urban underground constructions, applied to the case study of buried stormwater ponds. This study underlines the importance of careful planning and the use of the technique for order of preference by similarity to ideal solution (TOPSIS) in the selection of support for underground stormwater basins in urban environments. The TOPSIS method led to the selection of diaphragm walls as the optimum solution, illustrating its effectiveness in evaluating alternatives based on a variety of criteria. diaphragm wall modeling using robot structural analysis (RSA) software validated this choice and accurately predicted the structure's behavior, underlining the importance of numerical tools in engineering decision-making. The analysis of wall displacements, carried out using these tools, confirmed their compliance with standards, validating the choice of cast walls and highlighting the need for continuous monitoring to guarantee the stability of the structures.
The process of removing organic components from wastewater as BOD5 through wastewater treatment p... more The process of removing organic components from wastewater as BOD5 through wastewater treatment plants has been proven to be a significant source of greenhouse gas emissions, mainly methane CH4, carbon dioxide CO2 and nitrous oxide N2O. The reduction of these emissions has attracted more interest given their major contribution to global warming. This study was able to identify and estimate the amount of methane and CO2 emissions on a monthly basis by a simple modeling approach and an empirical method (IPCC) for N2O emissions, in the case of Ain-Taoujdate wastewater treatment plant, throughout the years 2013, 2018 and 2019. The results showed that anaerobic ponds were the main source of on-site emissions with 66% of total contribution and 33% for facultative ponds, followed by the energy consumption of the pumping station as off-site GHG emissions.
The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibili... more The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibility, among these rocks are those which constitute the Proterozoic and Paleozoic basement of the plain of Tamlelt which is the study area. This work is devoted to the analysis and interpretation of the main magnetic anomalies using the Oisis Montaj program, and the correlation using ArcGis software, from the main « magnetic facies» detected, to the main geological formations affecting the geological basement, highlighted in the plain of Tamlelt. The map of the residual magnetic field shows elongated magnetic anomalies in the direction E-W and NE-SW. the reduction to the pole shows at the level of the plain of Tamlelt a large anomaly elongated in the direction E-W then in the direction NW-SE. The transformation of Tilt Angle allowed to delimit the anomalies of low or high amplitude that limit the shallow structures. The quantitative interpretation of the main magnetic anomalies highlighted in the study area has made it possible to characterize the deep structure of the magnetic bodies, which could contain sulphide clusters, according to the geological and mining context of the studied area.
According to the Intergovernmental Panel on Climate Change (IPCC), climate change is manifested b... more According to the Intergovernmental Panel on Climate Change (IPCC), climate change is manifested by the increase in average surface atmospheric temperatures and a decrease in rainfall. The impacts are multiple, complex and differentiated from one region to another in the world. In the Guelmim region (southern Morocco), climate change is manifested by severe droughts and/or recurrent floods. The objective of this study is to characterize the recent and future climate variability in the Guelmim region based on time series of precipitation, the study period goes from 1985 to 2017, and from 2020 to 2099 using Standardized Precipitation Index (SPI).Results of SPI analysis indicate that the most notable droughts for their varying intensity, duration and frequency occurred during the 1992-94 and 1997-2000 periods. Future analysis indicates the study area will face several extended periods of drought and wet during 2020 to 2099. The results of this study show also the link between North Atla...
Several methods are proposed for improving the slopes stability. We are studying the use of a new... more Several methods are proposed for improving the slopes stability. We are studying the use of a new technique: concrete lozenges channels. The objective of this technique is to stabilize the slope against water erosion. In addition, it makes it possible to combine both mechanical protection with concrete lozenges channels and protection by plant engineering techniques with plants adapted to the area. The present study is part of the continuation of a parametric study whose purpose was to define the optimal design of concrete lozenges channels. Using the finite element method, the purpose is to study the geotechnical stability of a slope stabilized by said lozenges and to define their constructive arrangements.
The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes... more The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes their instability. Particularly in road environments, gullying on the slope's surface due to runoffs causes landslides, which in turn cause considerable damage and consequent disorders to the road network. The aim of this research is to put in place a new technology for superficial water drainage on slope surfaces. Our study has developed a methodology involving the change of the geometric configuration of the water flow, aiming at velocity control of the flows by choosing slanting waterways with small slopes coupled to vertical drains. A modelling of the proposed solution will evaluate its effectiveness as to prevent the erosive factor and to identify other factors that are responsible for slope disorders.
Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prend... more Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prendre la releve du gisement du Grand Daoui. Ce gisement phosphatier presente des discontinuites appelees communement « derangements » qui affectent totalement et/ou partiellement la succession habituelle de la serie phosphatee. Steriles, generalement tres durs et detectables uniquement lors de la foration, ces « derangements » ainsi definis perturbent considerablement les chaines cinematiques d'exploitation tout en biaisant les calculs de reserve . Les methodes directes telles les coupes de puits et les indices de surface (comme les lambeaux de dalle a thersitees) se sont averees insuffisantes et non adaptees pour la reconnaissance de ces discontinuites. Les transformations chimiques operees au niveau du « derangement » couplees a l'examen des lithofacies, a la teneur en argiles et a la durete de celui-ci, attestent de l'existence d'un contraste de resistivite electrique entre la serie phosphatee normale de resistivite comprise entre 80 et 150 Ώm et les « derangements » de resistivite superieure a 200 Ώm pouvant atteindre les 1000 Ώm. Dans ce contexte specifique, a la demande du Groupe Office Cherifien des Phosphates une campagne geophysique de prospection electrique en courant continu a ete realisee. Couvrant un panneau de 50 ha, cette etude pilote avait pour objectif de cartographier et de delimiter en surface les zones anomaliques correspondant aux « derangements ». Trois cartes de resistivite ont ainsi ete realisees avec un dispositif Schlumberger afin de circonscrire les zones anomaliques. Les longueurs de ligne AB=40m, AB=80m et AB=120m ont ete utilisees pour cibler des « derangements » situes sur des profondeurs moyennes comprises entre 15 et 40 m. Les mesures de resistivite ont ete realisees avec un RESISTIVIMETRE SYSCAL2 DE BRGM-INSTRUMENTS aux nœuds d' une maille de dimensions 20x5 m. Les cartes de resistivites ont ete dressees avec le logiciel Surfer(Win32) V.6.04 de Golden Sofware. L'analyse et l'interpretation des cartes de resistivite permettent d'optimiser le calcul des reserves. Journal des Sciences Pour l'Ingenieur Vol. 6, 2006: 1-10
We describe the problem and the negative impact engendered by the activity of exploitation of the... more We describe the problem and the negative impact engendered by the activity of exploitation of the quarries of the region of Casablanca-Mohammedia on the environment, most of which of these last ones were exploited to extract building materials, while most part of the exploited rocks are dolomites and limestones which constitute the reservoirs of the groundwaters of the region. The mismanagement of these quarries, and the bad choice to make of these quarries of the garbage dumps, which became the sources of pollution of the region, so putting in danger groundwaters and the environment surround. We shall take within the framework of this study as example the Mediouna landfill. The presents publication makes obvious a new technique for the treatment of the leachate of Mediouna landfill by the Diatomite. This last one was the object of a preceding study and that showed his usefulness in the filtration of worn waters.
Objectifs.-Examiner les effets de l'entraînement aérobie ou anaérobie sur la plasticité neuronale... more Objectifs.-Examiner les effets de l'entraînement aérobie ou anaérobie sur la plasticité neuronale spinale par le biais du réflexe de Hoffmann (H) et l'onde motrice M. Cette étude se propose de discuter l'hypothèse selon laquelle ces réponses réflexes pourront être utilisées pour estimer l'excitabilité des motoneurones et la transmission synaptique spinale. Méthodes.-Quatre groupes de 14 sportifs chacun (sprinteurs, athlètes demi-fond, footballeurs et nageurs) ont accepté au début de la saison sportive de mesurer au niveau du soléaire la puissance et l'explosivité en saut sur tapis de Bosco, la force maximale par haltères et les réflexes H et M par électromyographie. Après 10 mois d'entraînement, les mêmes variables n'ont été mesurés que chez les deux groupes d'athlètes (sprinteurs, athlètes de demi-fond). Résultats.-La comparaison des moyennes par Anova a montré que les différences intergroupes sont toutes statiquement significatives (p < 0,05) pour l'amplitude maximale du réflexe H. Les moyennes de cette variable ont diminué significativement (p < 0,05) chez les sprinteurs et augmenté significativement (p < 0,05) chez les athlètes de demi-fond. De plus, les corrélations bilatérales entre les paramètres physiques et électromyographiques se sont révélées toutes significatives (p < 0,01) sauf pour Mmax. Toutefois, les comparaisons filles/garçons n'ont révélé aucune différence significative. Conclusion.-Ces résultats suggèrent l'existence d'une adaptation synaptique au niveau spinal permettant d'expliquer le sens de l'évolution du réflexe H induit par le type d'activité physique pratiquée (aérobie ou anaérobie).
A comprehensive use of analytical hierarchy process (AHP) method in landslide susceptibility mapp... more A comprehensive use of analytical hierarchy process (AHP) method in landslide susceptibility mapping (LSM) has been presented for rim region of Tehri reservoir. Using remote sensing data, various landslide causative factors responsible for inducing instability in the area were derived. Ancillary data such as geological map, soil map, and topographic map were also considered along with remote sensing data. Exhaustive field checks were performed to define the credibility of the random landslide conditioning factors considered in this study. Apart from universally acceptable inherent causative factors used in the susceptibility mapping, others such as impact of reservoir impoundment on terrain, topographic wetness index and stream power index were found to be important causative factors in rim region of the Tehri reservoir. The AHP method was used to acquire weights of factors and their classes respectively. Weights achieved from AHP method matched with the existing field conditions. Acceptable consistency ratio (CR) value was achieved for each AHP matrix. Weights of each factor were integrated with weighted sum technique and a landslide susceptibility index map was generated. Jenk’s natural break classifier was used to classify LSI map into very low, low, moderate, high and very high landslide susceptible classes. Validation of the susceptibility map was performed using cumulative percentage/success rate curve technique. Area under curve value of the success rate curve was converted to percentage validation accuracy and a reasonable 78.7% validation accuracy was achieved.
Many countries all over the world have started to massively introduce renewable energy sources as... more Many countries all over the world have started to massively introduce renewable energy sources as clean alternatives to conventional energy sources. These technologies are expected to reduce pollution and dependence on fossil fuels. Indeed, the objective of introducing these alternative energy sources is to switch to more sustainable ones that would not compromise the capability of future generations to meet their own energy requirements. However, not many studies have been conducted to illustrate the impact of those renewable energy sources on the environment. Therefore, it is necessary to study their impact taking into consideration all stages of the life cycle of the power plant: the extraction of raw materials, construction of components, installation, operation and maintenance of the plant; and the end of life including waste management. This study focuses on one renewable energy source, which is Concentrated Solar Power (CSP). The approach used is a life cycle analysis of a CS...
Ecological Engineering & Environmental Technology, Dec 31, 2023
This paper illustrates the importance of integrating buried stormwater ponds into underground dev... more This paper illustrates the importance of integrating buried stormwater ponds into underground development plans using a multi-criteria analysis and modeling for the selection of support in urban underground constructions, applied to the case study of buried stormwater ponds. This study underlines the importance of careful planning and the use of the technique for order of preference by similarity to ideal solution (TOPSIS) in the selection of support for underground stormwater basins in urban environments. The TOPSIS method led to the selection of diaphragm walls as the optimum solution, illustrating its effectiveness in evaluating alternatives based on a variety of criteria. diaphragm wall modeling using robot structural analysis (RSA) software validated this choice and accurately predicted the structure's behavior, underlining the importance of numerical tools in engineering decision-making. The analysis of wall displacements, carried out using these tools, confirmed their compliance with standards, validating the choice of cast walls and highlighting the need for continuous monitoring to guarantee the stability of the structures.
The process of removing organic components from wastewater as BOD5 through wastewater treatment p... more The process of removing organic components from wastewater as BOD5 through wastewater treatment plants has been proven to be a significant source of greenhouse gas emissions, mainly methane CH4, carbon dioxide CO2 and nitrous oxide N2O. The reduction of these emissions has attracted more interest given their major contribution to global warming. This study was able to identify and estimate the amount of methane and CO2 emissions on a monthly basis by a simple modeling approach and an empirical method (IPCC) for N2O emissions, in the case of Ain-Taoujdate wastewater treatment plant, throughout the years 2013, 2018 and 2019. The results showed that anaerobic ponds were the main source of on-site emissions with 66% of total contribution and 33% for facultative ponds, followed by the energy consumption of the pumping station as off-site GHG emissions.
The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibili... more The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibility, among these rocks are those which constitute the Proterozoic and Paleozoic basement of the plain of Tamlelt which is the study area. This work is devoted to the analysis and interpretation of the main magnetic anomalies using the Oisis Montaj program, and the correlation using ArcGis software, from the main « magnetic facies» detected, to the main geological formations affecting the geological basement, highlighted in the plain of Tamlelt. The map of the residual magnetic field shows elongated magnetic anomalies in the direction E-W and NE-SW. the reduction to the pole shows at the level of the plain of Tamlelt a large anomaly elongated in the direction E-W then in the direction NW-SE. The transformation of Tilt Angle allowed to delimit the anomalies of low or high amplitude that limit the shallow structures. The quantitative interpretation of the main magnetic anomalies highlighted in the study area has made it possible to characterize the deep structure of the magnetic bodies, which could contain sulphide clusters, according to the geological and mining context of the studied area.
According to the Intergovernmental Panel on Climate Change (IPCC), climate change is manifested b... more According to the Intergovernmental Panel on Climate Change (IPCC), climate change is manifested by the increase in average surface atmospheric temperatures and a decrease in rainfall. The impacts are multiple, complex and differentiated from one region to another in the world. In the Guelmim region (southern Morocco), climate change is manifested by severe droughts and/or recurrent floods. The objective of this study is to characterize the recent and future climate variability in the Guelmim region based on time series of precipitation, the study period goes from 1985 to 2017, and from 2020 to 2099 using Standardized Precipitation Index (SPI).Results of SPI analysis indicate that the most notable droughts for their varying intensity, duration and frequency occurred during the 1992-94 and 1997-2000 periods. Future analysis indicates the study area will face several extended periods of drought and wet during 2020 to 2099. The results of this study show also the link between North Atla...
Several methods are proposed for improving the slopes stability. We are studying the use of a new... more Several methods are proposed for improving the slopes stability. We are studying the use of a new technique: concrete lozenges channels. The objective of this technique is to stabilize the slope against water erosion. In addition, it makes it possible to combine both mechanical protection with concrete lozenges channels and protection by plant engineering techniques with plants adapted to the area. The present study is part of the continuation of a parametric study whose purpose was to define the optimal design of concrete lozenges channels. Using the finite element method, the purpose is to study the geotechnical stability of a slope stabilized by said lozenges and to define their constructive arrangements.
The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes... more The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes their instability. Particularly in road environments, gullying on the slope's surface due to runoffs causes landslides, which in turn cause considerable damage and consequent disorders to the road network. The aim of this research is to put in place a new technology for superficial water drainage on slope surfaces. Our study has developed a methodology involving the change of the geometric configuration of the water flow, aiming at velocity control of the flows by choosing slanting waterways with small slopes coupled to vertical drains. A modelling of the proposed solution will evaluate its effectiveness as to prevent the erosive factor and to identify other factors that are responsible for slope disorders.
Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prend... more Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prendre la releve du gisement du Grand Daoui. Ce gisement phosphatier presente des discontinuites appelees communement « derangements » qui affectent totalement et/ou partiellement la succession habituelle de la serie phosphatee. Steriles, generalement tres durs et detectables uniquement lors de la foration, ces « derangements » ainsi definis perturbent considerablement les chaines cinematiques d'exploitation tout en biaisant les calculs de reserve . Les methodes directes telles les coupes de puits et les indices de surface (comme les lambeaux de dalle a thersitees) se sont averees insuffisantes et non adaptees pour la reconnaissance de ces discontinuites. Les transformations chimiques operees au niveau du « derangement » couplees a l'examen des lithofacies, a la teneur en argiles et a la durete de celui-ci, attestent de l'existence d'un contraste de resistivite electrique entre la serie phosphatee normale de resistivite comprise entre 80 et 150 Ώm et les « derangements » de resistivite superieure a 200 Ώm pouvant atteindre les 1000 Ώm. Dans ce contexte specifique, a la demande du Groupe Office Cherifien des Phosphates une campagne geophysique de prospection electrique en courant continu a ete realisee. Couvrant un panneau de 50 ha, cette etude pilote avait pour objectif de cartographier et de delimiter en surface les zones anomaliques correspondant aux « derangements ». Trois cartes de resistivite ont ainsi ete realisees avec un dispositif Schlumberger afin de circonscrire les zones anomaliques. Les longueurs de ligne AB=40m, AB=80m et AB=120m ont ete utilisees pour cibler des « derangements » situes sur des profondeurs moyennes comprises entre 15 et 40 m. Les mesures de resistivite ont ete realisees avec un RESISTIVIMETRE SYSCAL2 DE BRGM-INSTRUMENTS aux nœuds d' une maille de dimensions 20x5 m. Les cartes de resistivites ont ete dressees avec le logiciel Surfer(Win32) V.6.04 de Golden Sofware. L'analyse et l'interpretation des cartes de resistivite permettent d'optimiser le calcul des reserves. Journal des Sciences Pour l'Ingenieur Vol. 6, 2006: 1-10
We describe the problem and the negative impact engendered by the activity of exploitation of the... more We describe the problem and the negative impact engendered by the activity of exploitation of the quarries of the region of Casablanca-Mohammedia on the environment, most of which of these last ones were exploited to extract building materials, while most part of the exploited rocks are dolomites and limestones which constitute the reservoirs of the groundwaters of the region. The mismanagement of these quarries, and the bad choice to make of these quarries of the garbage dumps, which became the sources of pollution of the region, so putting in danger groundwaters and the environment surround. We shall take within the framework of this study as example the Mediouna landfill. The presents publication makes obvious a new technique for the treatment of the leachate of Mediouna landfill by the Diatomite. This last one was the object of a preceding study and that showed his usefulness in the filtration of worn waters.
Objectifs.-Examiner les effets de l'entraînement aérobie ou anaérobie sur la plasticité neuronale... more Objectifs.-Examiner les effets de l'entraînement aérobie ou anaérobie sur la plasticité neuronale spinale par le biais du réflexe de Hoffmann (H) et l'onde motrice M. Cette étude se propose de discuter l'hypothèse selon laquelle ces réponses réflexes pourront être utilisées pour estimer l'excitabilité des motoneurones et la transmission synaptique spinale. Méthodes.-Quatre groupes de 14 sportifs chacun (sprinteurs, athlètes demi-fond, footballeurs et nageurs) ont accepté au début de la saison sportive de mesurer au niveau du soléaire la puissance et l'explosivité en saut sur tapis de Bosco, la force maximale par haltères et les réflexes H et M par électromyographie. Après 10 mois d'entraînement, les mêmes variables n'ont été mesurés que chez les deux groupes d'athlètes (sprinteurs, athlètes de demi-fond). Résultats.-La comparaison des moyennes par Anova a montré que les différences intergroupes sont toutes statiquement significatives (p < 0,05) pour l'amplitude maximale du réflexe H. Les moyennes de cette variable ont diminué significativement (p < 0,05) chez les sprinteurs et augmenté significativement (p < 0,05) chez les athlètes de demi-fond. De plus, les corrélations bilatérales entre les paramètres physiques et électromyographiques se sont révélées toutes significatives (p < 0,01) sauf pour Mmax. Toutefois, les comparaisons filles/garçons n'ont révélé aucune différence significative. Conclusion.-Ces résultats suggèrent l'existence d'une adaptation synaptique au niveau spinal permettant d'expliquer le sens de l'évolution du réflexe H induit par le type d'activité physique pratiquée (aérobie ou anaérobie).
A comprehensive use of analytical hierarchy process (AHP) method in landslide susceptibility mapp... more A comprehensive use of analytical hierarchy process (AHP) method in landslide susceptibility mapping (LSM) has been presented for rim region of Tehri reservoir. Using remote sensing data, various landslide causative factors responsible for inducing instability in the area were derived. Ancillary data such as geological map, soil map, and topographic map were also considered along with remote sensing data. Exhaustive field checks were performed to define the credibility of the random landslide conditioning factors considered in this study. Apart from universally acceptable inherent causative factors used in the susceptibility mapping, others such as impact of reservoir impoundment on terrain, topographic wetness index and stream power index were found to be important causative factors in rim region of the Tehri reservoir. The AHP method was used to acquire weights of factors and their classes respectively. Weights achieved from AHP method matched with the existing field conditions. Acceptable consistency ratio (CR) value was achieved for each AHP matrix. Weights of each factor were integrated with weighted sum technique and a landslide susceptibility index map was generated. Jenk’s natural break classifier was used to classify LSI map into very low, low, moderate, high and very high landslide susceptible classes. Validation of the susceptibility map was performed using cumulative percentage/success rate curve technique. Area under curve value of the success rate curve was converted to percentage validation accuracy and a reasonable 78.7% validation accuracy was achieved.
Many countries all over the world have started to massively introduce renewable energy sources as... more Many countries all over the world have started to massively introduce renewable energy sources as clean alternatives to conventional energy sources. These technologies are expected to reduce pollution and dependence on fossil fuels. Indeed, the objective of introducing these alternative energy sources is to switch to more sustainable ones that would not compromise the capability of future generations to meet their own energy requirements. However, not many studies have been conducted to illustrate the impact of those renewable energy sources on the environment. Therefore, it is necessary to study their impact taking into consideration all stages of the life cycle of the power plant: the extraction of raw materials, construction of components, installation, operation and maintenance of the plant; and the end of life including waste management. This study focuses on one renewable energy source, which is Concentrated Solar Power (CSP). The approach used is a life cycle analysis of a CS...
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