Article
Engineering, Environmental
Massimiliano Schiavo, Nicolo Colombani, Micol Mastrocicco
Summary: This paper proposes a robust geostatistical methodology for assessing the salinity distribution in alluvial coastal areas. The study reveals that high salinity found inland may be attributed to trapped paleo-seawater rather than actual seawater intrusion. This methodology can be applied to similar coastal areas to understand the spatial patterns of salinization and delineate unsuitable zones for irrigation purposes.
Article
Environmental Sciences
Md. Mizanur Rahman Sarker, Marc Van Camp, Delwar Hossain, Mazeda Islam, Nasir Ahmed, Md. Masud Karim, Md. Abdul Quaiyum Bhuiyan, Kristine Walraevens
Summary: The study on hydrogeochemical processes in the multilayer aquifers of southwest coastal area of Bangladesh reveals the hydrochemical differences between different aquifers and the main processes affecting groundwater chemistry, providing insights for managing and preserving the water resources in the area.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Julia A. Cantelon, Julia A. Guimond, Clare E. Robinson, Holly A. Michael, Barret L. Kurylyk
Summary: With rising sea levels and increased frequency and intensity of storms, low-elevation coastal areas are at an increasing risk of seawater flooding. This flooding can lead to the salinization of coastal aquifers through vertical saltwater intrusion. However, vertical saltwater intrusion is often overlooked in coastal zone assessments. This review synthesizes previous studies on vertical saltwater intrusion and highlights the need for improved understanding, coordination, and education in addressing the vulnerability of coastal groundwater.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
A. Paldor, H. A. Michael
Summary: The study examines the impact of storm surges on coastal aquifers, finding that surges can lead to vertical infiltration and lateral saltwater intrusion, while climate change is projected to increase surge frequency and potentially induce long-term migration of the saltwater interface in aquifers along global coastlines.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Georgios Etsias, Gerard A. Hamill, Christopher Thomson, Samuel Kennerley, Jesus F. Aguila, Eric M. Benner, Mark C. McDonnell, Ashraf A. Ahmed, Raymond Flynn
Summary: This study investigated the saltwater upconing mechanism in fractured coastal aquifers through experiments, advanced image analysis algorithms, and numerical modeling. It identified the impact of fractures' length, permeability, and position on the upconing mechanism, providing valuable conclusions for the successful management of real-world fractured coastal aquifers.
Article
Engineering, Environmental
Sukran Acikel, Mehmet Ekmekci
Summary: The study analyzed the circulation of coastal karst aquifers in southwest Turkey using hydrochemical and isotopic data, revealing that the Azmak Streamflow Karst System consists of multiple components, with groundwater salinization being contributed not only by seawater mixing but also by other sources.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Environmental Sciences
Antoifi Abdoulhalik, Ashraf Ahmed, Abdelrahman Abdelgawad, Gerard Hamill
Summary: This paper investigates the effect of a top low-permeability layer on saltwater intrusion dynamics caused by water table fluctuations and sea level rise. The results show that increasing the thickness of the top layer can reduce the length of saltwater intrusion, and lowering the permeability of the upper aquifer can accelerate the removal of saltwater. However, if the upper layer thickness is less than or equal to one fifth of the total aquifer thickness, the reduction in intrusion length is minimal regardless of the permeability of the top layer. Additionally, the effectiveness of the low-permeability layer decreases as the hydraulic gradient decreases.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Geosciences, Multidisciplinary
Shaked Stein, Eyal Shalev, Orit Sivan, Yoseph Yechieli
Summary: Coastal aquifers serve as water sources for billions of people worldwide, but are threatened by seawater intrusion caused by excessive pumping. The management of coastal aquifers faces challenges related to climate change, control of extraction and recharge. Various approaches are used globally to prevent aquifer salinization. This essay discusses these challenges, possible solutions, and the need for improvement in different management approaches.
HYDROGEOLOGY JOURNAL
(2023)
Article
Geochemistry & Geophysics
Ilhem Moussaoui, Eric Rosa, Vincent Cloutier, Carmen Mihaela Neculita, Lassaad Dassi
Summary: This study aims to identify the sources and fate of salinity in the Djebeniana basin aquifers. Groundwater samples from two different aquifers were analyzed for various parameters, revealing distinct chemical compositions and geological processes. A conceptual model of groundwater salinization is proposed for better management of the basin's groundwater resources.
APPLIED GEOCHEMISTRY
(2023)
Article
Water Resources
Maryam Vahidipour, Ezzat Raeisi, Sjoerd E. A. T. M. van der Zee
Summary: The study focused on the shrinking wetlands of International Importance in southern Iran, resulting in increased total dissolved solids in the lakes. Through hydrogeological analysis, the researchers identified five zones based on electrical conductivity changes and hydraulic gradients, revealing active saltwater intrusion and groundwater flow directions. The forecasting models indicate a further deterioration of water quality and drop in groundwater levels, emphasizing the need for systematic and sustainable water management.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Environmental Sciences
Peng Huang, Chuanming Ma, Aiguo Zhou
Summary: Groundwater salinization is a significant issue in coastal areas, and this study provides insights into the complex mechanisms and influencing factors of groundwater salinization in the Laizhou Bay coastal area, contributing to a deeper understanding of its origins and informing groundwater protection policies.
Article
Biochemistry & Molecular Biology
Mohammed Benaafi, Bassam Tawabini, S. Abba, John D. Humphrey, Ahmed M. AL-Areeq, Saad A. Alhulaibi, A. G. Usman, Isam H. Aljundi
Summary: This study assesses seawater intrusion and groundwater salinization in the Al-Qatif area of eastern Saudi Arabia. It finds that shallow groundwater is more affected by seawater intrusion than deep groundwater. Recommendations are made to implement management practices and continuous monitoring of deep groundwater to protect it from seawater intrusion.
Article
Engineering, Chemical
Qinpeng Chang, Tianyuan Zheng, Youyuan Chen, Xilai Zheng, Marc Walther
Summary: This study demonstrates that inland freshwater influx is the key factor controlling the desalination of coastal aquifers, while the freshwater flow velocity at the wall opening also has a significant impact on the length of seawater intrusion. The results provide a comprehensive explanation of the hydrodynamic mechanism of cutoff walls and offer a reference for groundwater resource management in coastal regions.
Article
Geochemistry & Geophysics
Yanpeng Zhang, Qinghua Li, Yixuan Luo, Lu Yan, Kang Peng, Zimin Liu, Yanxin Wang
Summary: This study investigates the salinization processes and evolutionary mechanisms of groundwater in the Beihai area, China, using hydrogeochemical and isotopic analysis methods, combined with water level and quality monitoring. The results show that groundwater levels and total dissolved solids are influenced by seasonal variations and human activities, while the variations of hydrogen, oxygen, sulfur, and strontium isotopes are related to the degree of groundwater salinization. The study also identifies the significant influences of seawater intrusion and high-productivity mariculture activities on groundwater salinization.
APPLIED GEOCHEMISTRY
(2022)
Article
Water Resources
Marjorie B. Kreis, Jean-Denis Taupin, Nicolas Patris, Virginie Vergnaud-Ayraud, Christian Leduc, Patrick Lachassagne, Julien D. P. Burte, Eduardo S. P. R. Martins
Summary: This study provides new insights into the hydrogeological functioning and salinization processes of shallow crystalline groundwater in the semi-arid hinterland of Ceara. The data collected reveal fast flow circulation processes and a significant contribution of evaporated surface water to aquifer recharge. The groundwater consists mainly of seasonal vertical infiltration flows mixing with older waters stored in the aquifer.
HYDROLOGICAL SCIENCES JOURNAL
(2023)
Article
Computer Science, Interdisciplinary Applications
George Falalakis, Alexandra Gemitzi
JOURNAL OF HYDROINFORMATICS
(2020)
Article
Green & Sustainable Science & Technology
Maria Kofidou, Michael de Courcy Williams, Andreas Nearchou, Stavroula Veletza, Alexandra Gemitzi, Ioannis Karakasiliotis
Summary: This study analyzed the impact of environmental variables on mosquito populations using remote sensing data and an artificial neural network model, finding that land surface temperature was the most important factor in predicting mosquito populations. The developed model can predict mosquito populations 13 days in advance, providing a substantial window for appropriate control measures.
Article
Geosciences, Multidisciplinary
Konstantinos Kaffas, Vassilios Pisinaras, Mario J. Al Sayah, Simone Santopietro, Maurizio Righetti
Summary: This study analyzed sedimentation rates in a reservoir of a hydropower dam in South Tyrol, Italian Alps, focusing on a five-year period between two consecutive sediment flushing operations. The calculated reservoir sedimentation rates using different methods showed deviations from measured values, demonstrating the efficiency of the applied techniques for estimating reservoir sedimentation rates in an Alpine basin.
Article
Environmental Sciences
Alexandra Gemitzi, Nikos Koutsias, Venkataraman Lakshmi
Summary: A downscaling framework for GRACE Total Water Storage Anomaly data was developed using precipitation observations from the Global Precipitation Measurement mission. The study found that downscaled GRACE observations were comparable to TWSA estimates from hydrological modeling, indicating the potential of GRACE data in improving hydrological model performance.
Article
Chemistry, Analytical
Cosimo Brogi, Vassilios Pisinaras, Markus Koehli, Olga Dombrowski, Harrie-Jan Hendricks Franssen, Konstantinos Babakos, Anna Chatzi, Andreas Panagopoulos, Heye Reemt Bogena
Summary: Due to their unique characteristics, cosmic-ray neutron sensors (CRNSs) have the potential to monitor and inform irrigation management, optimizing water resource usage in agriculture. However, current practical methods for monitoring small, irrigated fields with CRNSs are unavailable, and the challenges of targeting areas smaller than the CRNS sensing volume remain unaddressed. This study uses CRNSs to continuously monitor soil moisture dynamics in two similar-sized irrigated apple orchards in Greece, and compares the CRNS-derived soil moisture with a reference obtained from a dense sensor network. An ad hoc calibration improved the accuracy of the CRNS-derived soil moisture before irrigation, but a correction based on neutron transport simulations and measurements from a non-irrigated location proved to be more effective in enhancing the CRNS-derived soil moisture, allowing for the monitoring of irrigation-induced soil moisture dynamics.
Article
Green & Sustainable Science & Technology
Vassilios Pisinaras, Frank Herrmann, Andreas Panagopoulos, Evangelos Tziritis, Ian McNamara, Frank Wendland
Summary: To support sustainable water resources management in the Pinios River Basin (PRB), we established and calibrated the mGROWA hydrological model at a high resolution (100 meters) and daily time scale, considering crop-specific irrigation requirements and overcoming data scarcity constraints. This approach provides spatially continuous estimates of various water balance components, such as actual evapotranspiration, irrigation requirements, total runoff, and groundwater recharge, and enables identification of potential unsustainable water use in irrigated agriculture.
Article
Agronomy
Iphigenia Keramitsoglou, Panagiotis Sismanidis, Olga Sykioti, Vassilios Pisinaras, Ioannis Tsakmakis, Andreas Panagopoulos, Argyrios Argyriou, Chris T. Kiranoudis
Summary: A new satellite-enabled interoperable service called SENSE-GDD has been developed to provide high-resolution and continuous time series of Growing Degree Days (GDDs) at the field level. Using MSG-SEVIRI data acquired by the EUMETCast station, the service calculates GDDs and downscales them on-the-fly to improve the spatial resolution. The reliability of SENSE-GDD in deriving accurate GDD timeseries at key phenological stages is assessed using in situ air temperature measurements from weather stations in vineyards and an apple orchard in Greece, and the assessment shows promising results.
Article
Water Resources
Maria Kofidou, Alexandra Gemitzi
Summary: This study aims to improve model performance by assimilating soil moisture information and using QSWAT to simulate hydrological processes in the Vosvozis River Basin. The results show that incorporating satellite-derived soil moisture into the calibration process can significantly improve the simulation of soil moisture conditions while maintaining satisfactory flow simulation.
Article
Environmental Studies
Margarita Bachantourian, Kyriakos Chaleplis, Alexandra Gemitzi, Kostas Kalabokidis, Palaiologos Palaiologou, Christos Vasilakos
Summary: This study compared the accuracy of three widely used land cover products and found that they all underestimated forested areas. Overall accuracy was high for broad classes, but specific weaknesses were highlighted in detailed classification, with CLC showing the highest overall accuracy.
Article
Environmental Sciences
Alexandra Gemitzi, Nikos Koutsias
Summary: This study demonstrates the application of a previously published methodology for analyzing the properties of NDVI time series in fire-affected areas. The research was motivated by the devastating fire events in Evia island, Greece in August 2021. The findings show lower standard deviation values in the NDVI time series of the fire-affected areas. The study utilized Landsat 8 NDVI time series data and developed a Google Earth Engine tool for processing and estimating the properties of the remotely sensed data.
REMOTE SENSING APPLICATIONS-SOCIETY AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Alexandra Gemitzi, Nikos Koutsias
Summary: The study assessed the properties of vegetation phenology in fire-affected areas in the Peloponnese, Greece over a 10-year period. Fire events caused breaks in NDVI time series and affected the trend and seasonality of vegetation recovery patterns. Areas with homogeneous vegetation without fire breaks were found to be the most vulnerable and severely affected by fires.
REMOTE SENSING APPLICATIONS-SOCIETY AND ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
Kleoniki Demertzi, Vassilios Pisinaras, Emanuel Lekakis, Evangelos Tziritis, Konstantinos Babakos, Vassilis Aschonitis
Summary: A simplified method for estimating annual actual evapotranspiration (AET) by considering topography, soil, and irrigation is proposed. This method is applied in Greece and compared with other climate-based methods, showing better performance in regions with high runoff.
Article
Environmental Studies
Alexandra Gemitzi
Article
Water Resources
Konstantinos Babakos, Dimitris Papamichail, Panagiotis Tziachris, Vassilios Pisinaras, Kleoniki Demertzi, Vassilis Aschonitis
Article
Agriculture, Multidisciplinary
Maria A. Banti, Kyriakos Kiachidis, Alexandra Gemitzi
JOURNAL OF LAND USE SCIENCE
(2019)
Article
Engineering, Chemical
Arvin Sohrabi, Mousa Meratizaman, Shuli Liu
Summary: This paper simulates and discusses possible solutions to improve the economic and technical performances of a battery-less renewable energy-powered BWRO system under real climate conditions. The study finds that the photovoltaic-based system performs better in terms of specific energy consumption and unused energy ratio.
Article
Engineering, Chemical
Chunlan Pan, Xiaoyin Hu, Vishal Goyal, Theyab R. Alsenani, Salem Alkhalaf, Tamim Alkhalifah, Fahad Alturise, Hamad Almujibah, H. Elhosiny Ali
Summary: This paper introduces a novel waste heat recovery method using the hot flue gas from a ship's engine to produce liquefied hydrogen while meeting the ship's air-conditioning requirement. A comprehensive feasibility assessment is conducted and an artificial neural network with a multiobjective grey wolf optimization method is used for optimization. The findings indicate the highest mean sensitivity index of the flash temperature and the best optimization scenario for exergy efficiency, CO2 emission reduction, and liquefied hydrogen cost.
Article
Engineering, Chemical
Daniele Chinello, Jan Post, Louis C. P. M. de Smet
Summary: In this study, PVDF-based anion-exchange membranes were designed to selectively separate nitrate from chloride. Experimental data showed that increasing the concentration of PVDF enhanced nitrate transport but also increased the membrane electrical resistance. The selectivity of nitrate was found to be independent of the membrane thickness and mainly driven by the increased affinity between the anion and the membrane.
Article
Engineering, Chemical
Umar Noor, Muhammad Fayyaz Farid, Ammara Sharif, Amna Saleem, Zubair Nabi, Muhammad Furqan Mughal, Kiran Abbas, Toheed Ahmed
Summary: Global water scarcity is increasing, and water desalination is an important solution. Multifunctional advanced materials, such as membrane materials and solar-driven desalination, play a crucial role in water desalination. Additionally, these materials can be used for water purification, wastewater treatment, and pollutant elimination.
Article
Engineering, Chemical
Emrah Gumus
Summary: With growing global concerns about climate change and environmental impacts, the use of nuclear energy in naval vessels offers a cleaner and more efficient solution to reduce emissions and address water and energy supply challenges. This study explores a novel system that combines a nuclear-driven supercritical carbon dioxide power cycle with reverse osmosis cogeneration to meet the water and electricity demands in maritime operations, enhancing the sustainability, efficiency, and self-sufficiency of naval vessels. The results indicate that the system has the potential to be a viable and effective solution for naval operations.
Article
Engineering, Chemical
Dao Thi Thanh Huyen, Saikat Sinha Ray, Young -Nam Kwon
Summary: This study focuses on the modification of a commercially available polyamide thin-film composite membrane with a zwitterionic material to enhance its fouling resistance. The modified membrane shows improved salt rejection and reduced permeability compared to the pristine membrane. Fouling tests demonstrate that the modified membrane has a lower fouling ratio and higher recovery ratio. The enhanced antifouling characteristics are attributed to the improved hydrophilicity resulting from the zwitterionic brushes and the salting-in effect.
Article
Engineering, Chemical
Niklas Koeller, Lukas Mankertz, Selina Finger, Christian J. Linnartz, Matthias Wessling
Summary: This study presents a methodology to scale up Flow-electrode Capacitive Deionization (FCDI) technology from lab-scale to pilot-scale systems. By increasing membrane area and using a stacking approach, the FCDI modules were successfully scaled up and achieved a salt transfer rate comparable to lab-scale systems. This provides a foundation for future assessments of energy demand and economics.
Article
Engineering, Chemical
Mona Gulied, Sifani Zavahir, Tasneem Elmakki, Hyunwoong Park, Guillermo Hijos Gago, Ho Kyong Shon, Dong Suk Han
Summary: This study introduces a novel hybrid system that combines direct contact membrane distillation (DCMD) and electrically switched ion exchange (ESIX) to facilitate seawater reverse osmosis (SWRO) brine enrichment and selective lithium recovery.
Article
Engineering, Chemical
Zhiqiang Zhang, Ruifeng Deng, Jiao Zhang, Lu She, Guangfeng Wei, Renyong Jia, Pengyu Xiang, Siqing Xia
Summary: A transmembrane electro-chemisorption system with authigenic acid and base was developed for enhancing ammonia recovery from strong ammonia wastewater. The system efficiently transformed ammonium into free ammonia, which was then adsorbed and recovered through transmembrane chemisorption. This system yielded pure (NH4)2SO4 product and produced valuable byproducts of pure hydrogen and oxygen. Higher applied voltage resulted in better ammonia recovery.
Article
Engineering, Chemical
Alena Popova, Sandrine Boivin, Takuji Shintani, Takahiro Fujioka
Summary: This study aimed to produce a high-integrity RO membrane by forming a polyamide skin layer on a TE support layer, in order to enhance the integrity of the membrane and improve the microbiological safety of potable water reuse.
Article
Engineering, Chemical
Sanjana Yagnambhatt, Saber Khanmohammadi, Jonathan Maisonneuve
Summary: This study investigates the concept of using heat to enhance reverse osmosis (RO) desalination. The effect of temperature on water permeate flux, specific energy, permeate quality, and applied operating pressures is evaluated using an analytical model. The results suggest that under specific conditions, the tradeoff between savings in mechanical pump work and thermal energy input in thermally-enhanced RO can be favorable, leading to overall energy savings.
Article
Engineering, Chemical
Jiangju Si, Chenrui Xue, Shun Li, Linchao Yang, Weiwei Li, Jie Yang, Jihong Lan, Ningbo Sun
Summary: To meet the huge demand for lithium resources, there is an urgent need to develop a new efficient technology for lithium recovery from salt-lake brines. In this study, a selective membrane capacitive deionization system is reported, which achieves high lithium recovery capacity and rate through the use of materials with efficient intercalated pseudo-capacitance and a high specific area porous carbon. The use of a modified thin-coated membrane allows for selective Li+ recovery, and adjusting the concentrations of Li+ and Mg2+ in the feed solution enables higher Li+/Mg2+ selectivity.
Article
Engineering, Chemical
Mohamed R. Salem, R. Y. Sakr, Ghazy M. R. Assassa, Omar A. Aly
Summary: This research proposes a new method of using wasted thermal energies as an additional heating source for solar still distillation units (SSDUs) to increase productivity and reduce pollution and global warming. By testing two SSDUs, the study shows that heating airflow can raise temperatures, enhance freshwater production, and improve system thermal efficiency.
Article
Engineering, Chemical
Qimeng Sun, Miao Sun, Linyan Yang, Yuan Gao, Xinghai Zhou, Lihua Lyu, Chunyan Wei
Summary: This study presents an innovative design and fabrication of a fabric-based conical roll (FCR) evaporator, which enables low-temperature evaporation and achieves high evaporation efficiency with excellent thermal management ability. The evaporator has demonstrated advanced light-harvesting capability and can produce freshwater that meets drinking water standards, showing great potential for applications in desalination and sewage treatment.
Article
Engineering, Chemical
Yidong Zhang, Wangfang Deng, Meiyan Wu, Chao Liu, Guang Yu, Qiu Cui, Pedram Fatehi, Chunlin Xu, Bin Li
Summary: In this study, a novel polydopamine-functionalized lignin-containing pulp foam evaporator with high-efficiency desalination and multi-contaminant adsorption capabilities was designed. The foam evaporator showed excellent light absorption, water absorption, thermal conductivity, and chelation abilities, allowing for solar evaporation and contaminant adsorption synergistically. It also exhibited potential applications in metal ion concentration and contaminated seawater treatments, and demonstrated superior biodegradability compared to poly-styrene foam. This foam material holds promise for developing multifunctional photo-thermal systems for solar-driven water purification.