Preprints

Filtering by Subject: Engineering

MultiRS Flood Mapper: A Google Earth Engine Application for Water Extent Mapping with Multimodal Remote Sensing and Quantile-Based Postprocessing

Zhouyayan Li, Ibrahim Demir

Published: 2023-12-10
Subjects: Engineering, Geotechnical Engineering, Hydraulic Engineering

Remote Sensing (RS) imagery is an important data source in surface water mapping applications thanks to its high spatial and temporal consistency and scalability. The introduction of Google Earth Engine (GEE) has cleared some of the major barriers of fast and large-scale RS-based geospatial analyses by providing easy and open access to most of the commonly used RS image products as well as [...]

Salt Precipitation during Geological CO2 Storage: Effect of Access to Continuous Brine Source

Mohammad Masoudi, Mohammad Nooraiepour, Helge Hellevang

Published: 2023-12-08
Subjects: Earth Sciences, Engineering, Environmental Sciences

During CO2 storage, the near-wellbore environment experiences significant chemical, physical, thermal, and mechanical perturbations. Therefore, it is crucial to characterize the coupled thermo-hydro-mechanical-chemical (THMC) processes in this region through representative experimental tests and numerical simulations to maximize the safety and cost-efficiency of CO2 storage. One common [...]

Precipitation Inequality Exacerbates Streamflow Inequality, but Dams Moderate it

Sai Kiran Kuntla, Manabendra Saharia, Samar Prakash, et al.

Published: 2023-12-04
Subjects: Engineering

Access to clean water is a fundamental human right, yet millions worldwide face the dire consequences of water scarcity and inadequate sanitation. Water inequality, characterized by disparities in access and availability of water resources, has emerged as a critical global challenge with far-reaching social, economic, and environmental implications. Using a globally representative observational [...]

Advancing hydrological monitoring using image-based techniques: challenges and opportunities

Salvatore Manfreda, Domenico Miglino, Khim Cathleen Saddi, et al.

Published: 2023-11-17
Subjects: Engineering, Life Sciences

Enhanced and effective hydrological monitoring plays a crucial role in understanding water-related processes in a rapidly changing world. This paper explores the challenges and opportunities associated with image-based hydrological monitoring techniques, and highlights the need for innovative approaches and technologies to overcome existing limitations. Image-based hydrological monitoring has [...]

Leveraging Past Information and Machine Learning to Accelerate Land Disturbance Monitoring

Su Ye, Zhe Zhu, Ji Won Suh

Published: 2023-11-13
Subjects: Engineering

Near real time (NRT) monitoring of land disturbances holds great importance for delivering emergency aids, mitigating negative social and ecological impacts, and distributing resources for disaster recovery. Many past NRT techniques were built upon examining the overall change magnitude of a spectral anomaly with a pre-defined threshold, namely the unsupervised approach. However, their lack of [...]

WITHDRAWN: Magma as a generator of plasma and thermonuclear reactions in the bowels of the Earth?

serguei bytchkov

Published: 2023-11-02
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

WITHDRAWN: Seismology for Dummies

serguei bytchkov

Published: 2023-11-02
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

WITHDRAWN: Earthquakes and Other Seismic Processes as Part of Impact Theory

serguei bytchkov

Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

WITHDRAWN: The Energy of Earthquakes. What's Wrong with the Elastic Recoil Theory?

serguei bytchkov

Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

WITHDRAWN: Thermonuclear Fusion as a Source of Seismic Phenomena?

serguei bytchkov

Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

Pacific shoreline erosion and accretion patterns controlled by El Niño/Southern Oscillation

Kilian Vos, Mitchell Dean Harley, Ian L Turner, et al.

Published: 2023-10-27
Subjects: Civil and Environmental Engineering, Climate, Earth Sciences, Engineering, Environmental Monitoring, Environmental Sciences, Geomorphology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

In the Pacific Basin, the El Niño/Southern Oscillation (ENSO) is the dominant mode of interannual climate variability, driving substantial changes in oceanographic forcing and impacting Pacific coastlines. Yet, how sandy coasts respond to these basin-scale changes has to date been limited to a few long-term beach monitoring sites, predominantly on developed coasts. Here we use 38 years of Landsat [...]

Poroelastic Properties of Sierra White Granite

Ahmad Ghassemi, Xejun Zhou

Published: 2023-10-19
Subjects: Engineering

In this work, poroelastic properties of Sierra White granite are determined, including elastic moduli, Biot's effective stress coefficient, α, and Skempton’s pore pressure coefficient, B. The Biot’s coefficient of this rock was determined using two different approaches. It is found that overall, the Biot’s coefficient decreases from 0.77 at low effective stress (3~4 MPa) to 0.45~0.55 at high [...]

CASH Paradox, ReWASH, Bronze-2-Gold and JEDI AWAKENS: introduction of new concepts to enhance the sustainability of the water-energy nexus

Gabriel Marinho Silva, Pedro Gustavo Câmara da Silva, Mateo Hernández Sánchez, et al.

Published: 2023-10-04
Subjects: Education, Engineering, Social and Behavioral Sciences

Amidst the escalating impacts of climate change and extreme weather events, participatory decision-making in water management stands out as a sustainable approach for disaster risk reduction. Hydrological disasters, such as floods and droughts, are increasing globally due to anthropogenic activities, necessitating adaptation in water infrastructure. The OECD projects severe water stress for 2.3 [...]

Persistent Global Greening Over the Last Four Decades Using Novel Long-term Vegetation Index Data with Enhanced Temporal Consistency

Sungchan Jeong, Youngryel Ryu, Pierre Gentine, et al.

Published: 2023-10-02
Subjects: Engineering

Advanced Very High-Resolution Radiometer (AVHRR) satellite observations have provided the longest global daily records from the 1980s, but the remaining temporal inconsistency in vegetation index datasets has hindered reliable assessment of vegetation greenness trends. To tackle this, we generated novel global long-term Normalized Difference Vegetation Index (NDVI) and Near-Infrared Reflectance [...]

Thermo-hydraulic analysis of desiccation cracked soil strata considering ground temperature and moisture dynamics under the influence of soil-atmosphere interactions

Milad Jabbarzadeh, Hamed Sadeghi, Saeed Tourchi, et al.

Published: 2023-09-26
Subjects: Engineering

Global warming and climate change significantly affect ground temperature and flow patterns. Moreover, areas prone to cracking experience intensified temperature and moisture variations. Therefore, the aim of this study is to investigate ground temperature and moisture dynamics considering soil-atmosphere interaction through a coupled thermo-hydraulic analysis. Heat transfer, advective, and [...]

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