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NEOM City in Saudi Arabia is planned to be the first environmentally friendly city in the world that is powered by renewable energy sources minimizing CO2 emissions to reduce the effect of global warming according to Saudi Arabia’s Vision 2030. In recent years, Saudi Arabia has had a problem with water scarcity. The main factors affecting water security are unequal water distribution, wrong use of water resources and using bad or less efficient irrigation techniques. This paper is aimed to provide a detailed feasibility and techno-economic evaluation of using several scenarios of a stand-alone hybrid renewable energy system to satisfy the electrical energy needs for an environmentally friendly seawater desalination plant which feeds 150 m−3 day−1 of freshwater to 1000 people in NEOM City, Saudi Arabia. The first scenario is based on hybrid solar photovoltaic PV, fuel cells (FC) with a hydrogen storage system and batteries system (BS), while the second and third scenarios are based on hybrid PV/BS and PV/FC with a hydrogen storage system, respectively. HOMER® software was used to obtain the optimal configuration based on techno-economic analysis of each component of the hybrid renewable energy systems and an economic and environmental point of view based on the values of net present cost (NPC) and cost of energy (COE). Based on the obtained results, the best configuration is PV/FC/BS. The optimal size and related costs for the optimal size are 235 kW PV array, 30 kW FC, 144 batteries, 30 kW converter, 130 kW electrolyzer, and 25 kg hydrogen tank is considered the best option for powering a 150 m3 reverse osmosis (RO) desalination plant. The values of net present cost (NPC) and the cost of energy (COE) are$438,657 and $ 0.117/kWh, respectively. From the authors’ point view, the proposed system is one among the foremost environmentally friendly systems to provide electric energy to the seawater desalination plant, especially when connecting to the utility grid, because it is ready to reduce a large amount of greenhouse gas emissions due to using oil/nature gas in utility generation stations to reduce the effect of global warming.

A risk analysis is conducted considering an array of release sources located around the NEOM shoreline. The sources are selected close to the coast and in neighboring regions of high marine traffic. The evolution of oil spills released by these sources is simulated using the MOHID model, driven by validated, high-resolution met-ocean fields of the Red Sea. For each source, simulations are conducted over a 4-week period, starting from first, tenth and twentieth days of each month, covering five consecutive years. A total of 180 simulations are thus conducted for each source location, adequately reflecting the variability of met-ocean conditions in the region. The risk associated with each source is described in terms of amount of oil beached, and by the time required for the spilled oil to reach the NEOM coast, extending from the Gulf of Aqaba in the North to Duba in the South. To further characterize the impact of individual sources, a finer analysis is performed by segmenting the NEOM shoreline, based on important coastal development and installation sites. For each subregion, source and release event considered, a histogram of the amount of volume beached is generated, also classifying individual events in terms of the corresponding arrival times. In addition, for each subregion considered, an inverse analysis is conducted to identify regions of dependence of the cumulative risk, estimated using the collection of all sources and events considered. The transport of oil around the NEOM shorelines is promoted by chaotic circulations and northwest winds in summer, and a dominant cyclonic eddy in winter. Hence, spills originating from release sources located close to the NEOM shorelines are characterized by large monthly variations in arrival times, ranging from less than a week to more than 2 weeks. Similarly, large variations in the volume fraction of beached oil, ranging from less then 50% to more than 80% are reported. The results of this study provide key information regarding the location of dominant oil spill risk sources, the severity of the potential release events, as well as the time frames within which mitigation actions may need to deployed.

Antimicrobial resistance reduces the possibility of avoiding and curing infectious diseases triggered by bacteria, viruses, parasites, and fungi. Therefore, searching for new antimicrobials from prolific producers of novel natural products, including marine sponges, is necessary to address this resistance. Marine sponges are known to host diverse microbial communities, many of which are prolific producers of bioactive secondary metabolites. Several biological activities are exhibited by bioactive metabolites extracted from marine sponges. Mounting research demonstrates that these secondary metabolites arise from microorganisms rather than sponges. This paper aims to assess the in vitro antimicrobial activity of bacteria associated with the marine sponge sample collected from the NEOM region of Saudi Arabia. Based on the morphology of the bacterial colonies, 13 marine bacterial isolates were obtained from the Negombata magnifica sponge sample using a culture-dependent method. Results indicate that screening of isolated strains showed that only two (15.4%) bacteria possess antimicrobial activity against some human pathogens, as determined by an agar plug diffusion method with fungi and an agar well-diffusion method with bacteria. Potential marine bacterial strains MB3 and MB8 were selected to identify bioactive products using GC-MS analyses. Bioactive compounds include Phenol, 2,4-bis(1,1-dimethylethyl)-, Tryptophol, and Pyrrolo[1,2-α]pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl)- (PPDHMP) were detected from the culture extract of strain MB3 and PPDHMP from MB8. Overall, this study highlights the potential of marine bacteria, symbiotically associated with the NEOM sponge sample, to produce antimicrobial compounds effective against human pathogenic microorganisms, like Staphylococcus aureus , Pseudomonas aeruginosa , Enterococcus faecalis , Klebsiella pneumoniae , and the fungus Candida albicans .

The economic and social development of the Kingdom of Saudi Arabia (KSA) has led to a rapid increase in the consumption of electricity, with the residential sector consuming approximately 50% of total electricity production. The KSA depends largely on non-renewable energy resources, and the government has produced Saudi Vision 2030. This plan aims to lessen the country’s reliance on fossil fuels and reduce associated problems such as air pollution. Saudi Vision 2030 combines renewable energy and new building designs so that, for example, the planned city of Neom will be net zero energy. This study addresses how best to reduce Neom’s reliance on the national grid through rooftop photovoltaic generation in residential buildings. The study develops a techno-economic model of rooftop PV with battery storage suitable for existing residential building types likely to be built in Neom city (villas, traditional houses, and apartments), and assesses the optimal PV size, battery storage capacity, and optimal orientation of the PV panels. The study used HOMER Pro to compute the Net Present Cost, Levelized Cost of Energy, orientation of PV panels, and optimum PV system size. The optimal size of PV system is 14.0 kW for the villa, 11.1 kW for the traditional dwelling, and 10.3 kW for the apartment, each with a single battery of capacity 12 kWh.

Coastal lagoons are shallow water bodies connected through narrow inlets, and their varying hydrographic conditions lead to distinct ecological characteristics providing important ecosystem services. Sharma is a restricted coastal lagoon ( 150 km 2 ) surrounded by pristine coral reefs in the northern Red Sea (NRS), and it holds significant value as it is part of Saudi Arabia’s NEOM ongoing gigaproject. Previous research revealed a remarkable anomalous phytoplankton seasonality within the lagoon compared to the rest of the NRS waters, with the lagoon exhibiting a late summer peak, opposite to the winter/spring peak in open waters. Here we aim to identify the physical mechanisms driving this phytoplankton phenology paradox and support informed decision-making for the lagoon’s future. To investigate the driving mechanism of phytoplankton phenology inside the lagoon, we utilised regionally-tuned satellite chlorophyll-a data (Sentinel-3 OLCI), in situ cruise measurements, and outputs from a high-resolution numerical model (Delft3D). We reveal several hydrodynamic differences between winter and summer that collectively alter stratification strength and nutrient availability within the lagoon due to its enclosed nature. Tidal oscillations modulate lagoon exchange, with seasonal density differences altering stratification and mixing. In summer, this density difference diminishes, and flood tides can induce mixing, especially during the day. Additionally, diurnal heat fluxes, particularly the summer nighttime heat loss from evaporation, enhance vertical mixing and ultimately nutrient availability. Following our findings, we provide recommendations to the NEOM project stakeholders targeting to sustain Sharma’s ecosystem services by maintaining this natural phytoplankton phenology paradox.

Neom city is a unique cross-border city connecting Saudi Arabia, Jordan, and Egypt. Although Neom city is of great and critical importance for Saudi Arabia, few hydrological, natural hazard, and geomorphological studies have been undertaken on this region. This work aims to investigate the hydro-geomorphological characteristics and assess the flash flood hazards in Neom city by investigating several valuable morphometric parameters. The Shutter Radar Topography Mission (SRTM) digital elevation model and hydrological and geological data were analyzed in this study using ArcGIS software. Based on the morphometric parameter results, total stream lengths and stream orders were relatively high (17,956.03 km and 5, respectively), whereas the average bifurcation ratio was recorded to be low at 3.54. Basins 10, 12, 17, 30, 31, 32, and 34 were described as large basins, coarse-textured, elongated, with a medium drainage density, low infiltration values, long overland flows, and high values of constant maintenance. Additionally, the El-Shamy approach for flood hazard assessment was applied side by side with the morphometric analysis, which indicated that the possibility of an intense flood hazard is very low. In general, this study suggests that most of the studied basins cover similar and resistant rocks and soils. They have minimal conditions for flooding events and suitable conditions for underground and surface water resources. Therefore, they display high signals of susceptibility to erosion. The morphometric analysis and flash flood assessment techniques applied in this study were time- and cost-effective for the morphometric characterization of landforms. This text deals with the analysis of several environmental characteristics including hydro-morphological characteristics, drainage topography and lithology, soil erosion, groundwater recharge impact, and flash flood signals. Excellent sustainability plans should be reliant on extensive and varied information about the environment. Thus, integrated analyses incorporating environmental characteristics and flood hazard assessment play an important role in adjusting and adapting the suitable socioeconomic and scientific sustainability of the development of the study city. They build up the basic and essential information required to help decision-makers and sustainability managers design and adjust the most suitable sustainability plans for the study city over the long term.

A black coral, Bathypathes thermophila Chimienti, sp. nov. is described from the Saudi Arabian coasts of the Gulf of Aqaba and north Red Sea (Neom area) using an integrated taxonomic approach. The morphological distinctiveness of the new species is confirmed by molecular analyses. The species thrives in warm and high salinity waters typical of the Red Sea at bathyal depths. It can form colony aggregations on muddy bottoms with scattered, small hard substrates. Colonies are monopodial, feather-like, and attached to a hard substrate through a thorny basal plate. Pinnules are simple, arranged biserially and alternately, and all the same length (up to approximately 20 cm) except for few, proximal ones. Spines are triangular, laterally compressed, subequal, smooth, and simple or rarely bifurcated. Polyps are elongated transversely, 1.5–2.0 mm in transverse diameter. Large colonies can have one or few branches, whose origin is discussed. The phylogenetic position of B. thermophila sp. nov. within the order Antipatharia, recovered using three mitochondrial markers, shows that it is nested within the family Schizopathidae. It is close to species in the genera Parantipathes , Lillipathes , Alternatipathes , and Umbellapathes rather than to the other available representatives of the genus Bathypathes , as currently defined based on morphology. In agreement with previous findings, our results question the evolutionary significance of morphological characters traditionally used to discriminate Antipatharia at higher taxonomic level.

The objective of this case study was to examine how the planned city of NEOM in Saudi Arabia can contribute to the country’s economy and sustainability goals. The case study was intended to assess the challenges of planned city projects through the lens of the potential benefits to the host country’s economy. Using data from the project’s official website and relevant publications, it became possible to assess the risk management in urban megaprojects and to explore the issue of sustainable urbanization in the context of NEOM. In order to analyze the data, content analysis and thematic analysis techniques were used which allowed for the identification of patterns and trends in the data and to draw conclusions about the potential contributions of NEOM to Saudi Arabia’s economy and sustainability goals. The findings suggest that NEOM, which aims to be a net-zero carbon city, has attracted significant partners and investors interested in testing renewable energy technologies and infrastructure. The viability of NEOM as a testing ground for sustainable planned cities and their impact on the host country will depend on the ability to effectively balance the potential economic benefits with the risks and costs associated with the project. This study’s results indicate that NEOM represents an opportunity for Saudi Arabia to rebrand its image and participate in the creation of a green future, but its success will depend on fulfilling the investment requirements and managing the project-related challenges.

Effective management to conserve marine environments requires up-to-date information on the location, distribution, and extent of major benthic habitats. Remote sensing is a key tool for such assessments, enabling consistent, repeated measurements over large areas. There is particular interest in using freely available satellite images such as from the Copernicus Sentinel-2 series for accessible repeat assessments. In this study, an area of 438 km2 of the northern Red Sea coastline, adjacent to the NEOM development was mapped using Sentinel-2 imagery. A hierarchical Random Forest classification method was used, where the initial level classified pixels into a geomorphological class, followed by a second level of benthic cover classification. Uncrewed Aerial Vehicle (UAV) surveys were carried out in 12 locations in the NEOM area to collect field data on benthic cover for training and validation. The overall accuracy of the geomorphic and benthic classifications was 84.15% and 72.97%, respectively. Approximately 12% (26.26 km2) of the shallow Red Sea study area was classified as coral or dense algae and 16% (36.12 km2) was classified as rubble. These reef environments offer crucial ecosystem services and are believed to be internationally important as a global warming refugium. Seagrass meadows, covering an estimated 29.17 km2 of the study area, play a regionally significant role in carbon sequestration and are estimated to store 200 tonnes of carbon annually, emphasising the importance of their conservation for meeting the environmental goals of the NEOM megaproject. This is the first map of this region generated using Sentinel-2 data and demonstrates the feasibility of using an open source and reproducible methodology for monitoring coastal habitats in the region. The use of training data derived from UAV imagery provides a low-cost and time-efficient alternative to traditional methods of boat or snorkel surveys for covering large areas in remote sites.

The Saudi Arabia government announced the $500 billion mega project “NEOM City”, to build a cross-border mega city to connect Saudi Arabia, Egypt, and Jordon for attracting foreign investments to the region. NEOM city is situated on the eastern region of the Gulf of Aqaba with its western side in the Sinai Peninsula. The selected site for NEOM city is geographically remarkable; nevertheless, this site needs a detailed geological and geophysical investigation. Sinai Peninsula is a microplate between the Arabian and African plates. Its southern tip is located at a triple junction comprising the Gulf of Aqaba–Dead Sea Transform fault, the Gulf of Suez, and the Red Sea, leading to relatively higher seismic activities in the region. The current study aims to understand the thermal structure of the vicinity of NEOM city to address the potential geohazards and indicate geological attractions within and around the planned city. We use the magnetic data from which geothermal images can be obtained. The preliminary results indicate that there is geologic similarity between the southern part of Sinai Peninsula and the northern part of the Arabian shield. This is because the Gulf of Aqaba separates what was once a continues Neoproterozoic crust. In addition, the magnetic data showed the presence of prominent lineaments on either side of the Gulf of Aqaba. The notable lineaments might represent faults that could still be active. Hence, selecting a site of NEOM city to be east of the Gulf of Aqaba needs to be guided by the careful understanding of the potential hazards. In addition, shallow Curie depths near the Gulf of Aqaba are recognized as a source for renewable geothermal energy.