Results 11 to 20 of about 133,844 (123)
The Relational Materiality of Groundwater [PDF]
GeoHumanities, 2021 This paper is part of a larger research project which draws out ways of knowing and thinking with groundwater from Chennai, south India. The (under)ground or (sub)terranean environment is a thick and complex, three-dimensional space of "nothing but change," but whose utility is essential to sustaining urban life above it.
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Water Environment Research, 2020 AbstractGroundwater is a vital component of water supply for residential, industrial, and agricultural purposes. However, many groundwater basins are being used unsustainably and groundwater contamination is a growing water quality problem. Although anthropogenic activities and natural processes have been increasing the contamination in this valuable ...
Amir Mohaghegh Motlagh +2 more
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Geochemistry constrains global hydrology on Early Mars [PDF]
, 2019 Ancient hydrology is recorded by sedimentary rocks on Mars. The most voluminous sedimentary rocks that formed during Mars' Hesperian period are sulfate-rich rocks, explored by the $Opportunity$ rover from 2004-2012 and soon to be investigated by the $Curiosity$ rover at Gale crater.
arxiv +1 more source
Rethinking Groundwater Age [PDF]
Nature Geoscience, 2020 It is commonly thought that old groundwater cannot be pumped sustainably, and that recently recharged groundwater is inherently sustainable. We argue that both old and young groundwaters can be used in physically sustainable or unsustainable ways.
Jennifer C. McIntosh +7 more
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One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36 [PDF]
, 2004 Measurements of 81Kr/Kr in deep groundwater from the Nubian Aquifer (Egypt) were performed by a new laser-based atom-counting method. 81Kr ages range from \~2x10^5 to ~1x10^6 yr, correlate with 36Cl/Cl ratios, and are consistent with lateral flow of groundwater from a recharge area near the Uweinat Uplift in SW Egypt.
arxiv +1 more source
Understanding the Efficacy of U-Net & Vision Transformer for Groundwater Numerical Modelling [PDF]
arXiv, 2023 This paper presents a comprehensive comparison of various machine learning models, namely U-Net, U-Net integrated with Vision Transformers (ViT), and Fourier Neural Operator (FNO), for time-dependent forward modelling in groundwater systems. Through testing on synthetic datasets, it is demonstrated that U-Net and U-Net + ViT models outperform FNO in ...
arxiv
Groundwater pumping to increase food production causes persistent groundwater drought in India [PDF]
arXiv, 2019 Rapid groundwater depletion in India is a sustainability challenge. However, the crucial role of climate and groundwater pumping on persisting groundwater drought remains unrecognized. Using the data from Gravity recovery climate experiment (GRACE) satellites and more than 5000 observational wells, here we show that the increase in precipitation in ...
arxiv
Surrogate Optimization of Deep Neural Networks for Groundwater Predictions [PDF]
arXiv, 2019 Sustainable management of groundwater resources under changing climatic conditions require an application of reliable and accurate predictions of groundwater levels. Mechanistic multi-scale, multi-physics simulation models are often too hard to use for this purpose, especially for groundwater managers who do not have access to the complex compute ...
arxiv
SARGDV: Efficient identification of groundwater-dependent vegetation using synthetic aperture radar [PDF]
arXiv, 2020 Groundwater depletion impacts the sustainability of numerous groundwater-dependent vegetation (GDV) globally, placing significant stress on their capacity to provide environmental and ecological support for flora, fauna, and anthropic benefits. Industries such as mining, agriculture, and plantations are heavily reliant on groundwater, the over ...
arxiv
Multi-scale Digital Twin: Developing a fast and physics-informed surrogate model for groundwater contamination with uncertain climate models [PDF]
arXiv, 2022 Soil and groundwater contamination is a pervasive problem at thousands of locations across the world. Contaminated sites often require decades to remediate or to monitor natural attenuation. Climate change exacerbates the long-term site management problem because extreme precipitation and/or shifts in precipitation/evapotranspiration regimes could re ...
arxiv