Ministry of Energy, Mines, Water and Environment

Abstract This paper examines the causal impact of the technological innovation, trade openness and economic growth on the renewable energy use (RE) in Germany, the United Kingdom and Turkey. To this end, Breitung and Candelon (Journal of Econometrics, 2006, 132, 363) causality test linked to Toda and Yamamoto (Journal of Econometrics, 1995, 66, 225) procedure is applied on data for the period 1985–2021. Our results indicate that the German RE is mainly affected by the technological innovation and economic growth, but over the long‐term. Regarding the United Kingdom, its RE dynamics is found to be significantly impacted by the technological progress, trade openness and output growth all together, but only during the long‐run. However, in Turkey, the RE long‐term pattern is mainly led by the technological innovation, while the RE short‐term dynamics is primarily drown by the trade openness. This study provides policymakers a better understanding of RE pattern to formulate appropriate policies dealing with energy security, sustainable development and environmental pollution.

Dans le domaine de l’électricité, la modernisation écologique suppose une transition vers des sources primaires renouvelables comme le solaire et l’éolien. Souvent abordés plutôt sous l’angle de la technique, ces processus de transition se situent au centre d’un réseau de relations entre trois pôles apparemment indépendants : la technologie, l’environnement et la société, qui forment un « nexus ». Il faut donc les approcher en considérant les trois dimensions simultanément et dans leurs interactions. Dans cet article, nous appliquons ce cadre d’analyse au cas de la transition énergétique initiée dans la ville de Tucson (Arizona, États-Unis), qui répond parfaitement au cadre théorique de la modernisation écologique en ce qu’elle vise à maintenir le niveau de consommation final tout en minimisant l’impact environnemental. En appliquant le prisme du nexus technologie-société-environnement, nous montrons combien le progrès technique n’est pas la seule variable clé et nous observons les nouvelles questions que permet de poser l’approche « nexus ».

This research work presents the high-speed railway line (HSRL) case study constructed on soft soils deposits. The performance of the improvement method combining both PVD’s (Prefabricated vertical drains) and surcharge preloading was evaluated herein based on numerical simulation approach to predict the induced deformations during the HSRL construction phase. For this aim, the performance of the PVD-assisted preloading was evaluated based on in situ measurement database from a selected well instrumented embankment. From the results, it was observed that the use of the PVD and preloading was found as the most efficient improvement method for improved section. In addition, multiple modelling approaches were used for the studied section to evaluate the usefulness of the published literature on the PVD- surcharge system performance. For that, is was concluded that the well-developed numerical approaches in the literature is an encouraging factor for using the PVD-preloading improvement method in both practice and research.

Abstract Event-based rainfall-runoff mechanism modeling is a very useful process for flood forecasting, in particular at the level of the dam watersheds in semi-arid regions. In this regard, this paper presents a flood modeling application in the Sidi Mohammed Ben Abdellah (SMBA) dam watershed in Morocco, using the HEC-HMS model. The Soil Conservation Service (SCS) Curve Number (CN), the SCS Unit hydrograph, and the Recession were chosen as loss, transform, and baseflow methods respectively. The various frequency floods entering the SMBA dam were simulated using the elaborated model. The results show that it is possible to estimate the volumes of water generated during floods satisfactorily with errors of 6–11%, while the error in peak flow is around 20%. The median NSE, during validation, is 0.58 and the R2 is about 0.67. Sensitivity analysis shows that the runoff volume, the peak flow, and the NSE were found to be more sensitive to lag time and CN parameters. The developed event-based model will make it possible to carry out several simulations allowing the assessment of the North to South Water Transfer Project operation, in particular, the SMBA dam reservoir management during the flood periods.

A rich rugose coral assemblage has been recorded from a biostrome at the top of the Djebel Ouarkziz Fm. in the Tindouf Basin, S. Morocco. It is composed of 10 genera and 14 species, of which 5 are new: Dibunophyllum bipartitum, Arachnolasma sp., Palaeosmilia murchisoni, Palaeosmilia ressoti, Palastraea regia, Siphonodendron tindoufense sp. nov., Siphonodendron ouarkzizense sp. nov., Diphyphyllum maximum, Axophyllum moroccoense sp. nov., Gangamophyllum sp., Axoclisia sahariense sp. nov., Axoclisia cf. coronata, Actinocyathus sarytschevae and Actinocyathus mariae sp. nov. It represents essentially a Mississippian-type coral fauna but with some evolved species. However, its age, as determined by foraminifers, is early Bashkirian (Early Pennsylvanian). The presence of Mississippian-like corals in the Bashkirian indicates that the epicontinental basins in northern Gondwana (Saharan basins) were a refuge for coral faunas during the late Serpukhovian extinction event. The persistence of the Mississippian assemblages in the Bashkirian from northern Gondwana was probably due to a combination of warm waters and tectonic stability. The coral assemblage from the Tindouf biostrome is similar to those corals recorded from Ellesmere Island, Arctic Canada and Novaya Zemlya, Arctic Russia where similar tropical warm water conditions have been identified during the Bashkirian in the northern hemisphere

ABSTRACT Geophysical data processing further constrained inversion is evolving progressively prevalent in geoscience domains for three-dimensional modelling and resources evaluation. The process is based on the magnetic and gravity data processing further constrained Cartesian cut cell inversion to discern the maximum of information about HAJJAR deposit in order to calculate its tonnage. This article exhibits data and inversion processing technique for tonnage calculation based on an important geophysical magnetic and gravity surveys of defined extent of HAJJAR region, which presents a great benefit to save time and have accurate and realistic results to a same case. Otherwise, the potential-field signatures of what are regarded to be geologically expressive features are sought within the magnetic and gravity data. The preliminary stage for tonnage calculation was residual anomaly processing and depth estimation of the orebody using spectral analysis method. However, progressing towards extracting the deposit signature, the used method leads to invest the gravity signature of the orebody in adequacy with the magnetic signature. Finally, the tonnage calculation was developed by constrained Cartesian cut cell inversion using Voxi Earth ModellingTM. Obtained results were very important, given their qualitative and quantitative accuracy, which give an added value for the governmental geological and geophysical survey.