Global water resources and the role of groundwater in a resilient water future

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(2), P. 87 - 101

Published: Jan. 31, 2023

Language: Английский

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Rapid groundwater decline and some cases of recovery in aquifers globally

Nature, Journal Year: 2024, Volume and Issue: 625(7996), P. 715 - 721

Published: Jan. 24, 2024

Abstract Groundwater resources are vital to ecosystems and livelihoods. Excessive groundwater withdrawals can cause levels decline 1–10 , resulting in seawater intrusion 11 land subsidence 12,13 streamflow depletion 14–16 wells running dry 17 . However, the global pace prevalence of local declines poorly constrained, because situ have not been synthesized at scale. Here we analyse groundwater-level trends for 170,000 monitoring 1,693 aquifer systems countries that encompass approximately 75% 18 We show rapid (>0.5 m year −1 ) widespread twenty-first century, especially regions with extensive croplands. Critically, also accelerated over past four decades 30% world’s regional aquifers. This acceleration deepening highlights an urgent need more effective measures address depletion. Our analysis reveals specific cases which reversed following policy changes, managed recharge surface-water diversions, demonstrating potential depleted recover.

Language: Английский

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Hydropower expansion in eco-sensitive river basins under global energy-economic change

Nature Sustainability, Journal Year: 2024, Volume and Issue: 7(2), P. 213 - 222

Published: Jan. 22, 2024

Language: Английский

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Advancing Efficiency in Solar-Driven Interfacial Evaporation: Strategies and Applications

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 8, 2025

Solar-driven interfacial evaporation (SDIE) has emerged as a promising technology for addressing global water scarcity by utilizing solar-thermal conversion and at the air/material/water interface. The exceptional performance of these systems attracted significant interest; it is imperative to establish rigorous scientific standards evaluating effectiveness, optimizing system design, ensuring efficient practical applications. In this Review, we propose consensus criteria accurately assessing guiding future advancements. We then explore fundamental mechanisms driving synergy, emphasizing how material compositions, microscopic hierarchical structures, macroscopic three-dimensional spatial architecture designs enhance solar absorption photothermal conversion; balance heat confinement with pathway optimization; manage salt resistance; regulate enthalpy during vaporization. These matched coordination strategies are crucial maximizing target SDIE efficiency. Additionally, investigate applications technologies, focusing on cutting-edge progress versatile purification, combined atmospheric harvesting, collection, electric generation, deicing. Finally, highlight challenges exciting opportunities advancing research, efforts integrate principles, system-level collaboration, application-driven approaches boost sustainable highly energy technologies. By linking evaluation optimization influencing factors, offer comprehensive overview field outlook that promotes clean production synergistic

Language: Английский

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Hydrochemical Characterization and Quality Assessment of Groundwater in Hatiya Island, Southeastern Coastal Region of Bangladesh

Water, Journal Year: 2023, Volume and Issue: 15(5), P. 905 - 905

Published: Feb. 26, 2023

Groundwater is a vital source of fresh water for drinking and agricultural purposes in the region Hatiya Island, Bangladesh, yet it subject to contamination by natural anthropogenic activities. Over time, has resulted variety negative effects on human health. This research aims examine groundwater hydrogeochemical characterization suitability irrigation different indices utilizing combined geochemical method, multivariate statistical approaches, geospatial analysis. Results analyses 15 samples from intermediate aquifer (60–90 m depth) represent order cations, anions, metal concentrations as Na+ > Mg2+ Ca2+ K+, Cl− SO42− HCO3− NO3−, Fe I Br Mn As, respectively. Saltwater intrusion been determined be most important process influencing chemistry groundwater. Principal component analysis, Pearson’s correlation matrix, hierarchical cluster analysis indicate that quality highly governed geogenic influences. information evaluated using index map, which found six (40%) are suitable consumption, whereas other nine (60%) unfit drinking. The parameters revealed eight (54%) excellent or good condition uses; however, seven (46%) unsuitable.

Language: Английский

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Advancing Geohazard Monitoring: Sentinel‐1 InSAR Observations of Land Subsidence in Northern and Central Bangladesh

Geological Journal, Journal Year: 2025, Volume and Issue: 60(5), P. 1106 - 1128

Published: April 28, 2025

ABSTRACT Bangladesh in the Bengal Delta faces complex environmental issues, including sea‐level rise, coastal flooding, high population density, and widespread poverty. These factors lead to severe land loss, saltwater intrusion, water scarcity, biodiversity decline, further exacerbated by climate change. challenges significantly risk groundwater availability increase likelihood of natural hazards such as subsidence, landslides, flooding. This study quantitatively maps spatial distribution subsidence urban agricultural settings utilising Differential Interferometric Synthetic Aperture Radar (DInSAR) Persistent Scatter (PSI) techniques with ascending Sentinel‐1 satellite data. We analysed 55 pairs images DInSAR 142 PSI from March 2017 October 2022, focusing on five target locations for Dhaka PSI. Findings reveal consistent at an average rate 16 mm/year, along semi‐seasonal variability locations. Specific rates are 7 mm/year Dhaka, 8 both Rajshahi Mymensingh, 9 Rangpur. Sylhet subsides a 5 potentially linked fold thrust belt Dauki Fault. Our research highlights significant impacts human activities like withdrawal land‐use changes, which contribute depletion via Water Machine. While is required comprehensively understand relationship between LOS indicated rates, geological factors, geomorphological our findings offer crucial insights into current change ongoing degradation region.

Language: Английский

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Global groundwater droughts are more severe than they appear in hydrological models: An investigation through a Bayesian merging of GRACE and GRACE-FO data with a water balance model

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169476 - 169476

Published: Dec. 23, 2023

Realistic representation of hydrological drought events is increasingly important in world facing decreased freshwater availability. Index-based monitoring systems are often adopted to represent the evolution and distribution droughts, which mainly rely on model simulations compute these indices. Recent studies, however, indicate that derived water storage estimates might have difficulties adequately representing reality. Here, a novel Markov Chain Monte Carlo - Data Assimilation (MCMC-DA) approach implemented merge global Terrestrial Water Storage (TWS) changes from Gravity Recovery And Climate Experiment (GRACE) its Follow On mission (GRACE-FO) with estimations W3RA balance model. The modified MCMC-DA summation deep-rooted soil groundwater then used 0.5∘ standardized indices globally show impact GRACE/GRACE-FO DA index-based system. Our numerical assessment covers period 2003–2021, shows integrating data modifies seasonality inter-annual trends estimations. Considerable increases length severity extreme droughts found basins exhibited multi-year fluctuations those affected by climate teleconnections.

Language: Английский

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Pumping-induced groundwater aging and rejuvenation in aquifer-aquitard systems: A perspective from regional groundwater flow

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 632, P. 130718 - 130718

Published: Jan. 24, 2024

Language: Английский

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What drives changes in surface water salinity in coastal Bangladesh?

Frontiers in Water, Journal Year: 2024, Volume and Issue: 6

Published: April 17, 2024

The salinisation of freshwater resources is a priority concern in Asian mega-deltas including the Bengal Basin Bangladesh where livelihoods, ecosystem services and health coastal populations are increasingly under threat. Understanding trends variations surface water salinity required to inform sustainable use supplies face hydrological regimes intensified by global environmental change. We interrogate 86 time series fortnightly records situ between 1990 2019. Statistical geospatial techniques were employed characterise spatiotemporal distributions identify key drivers change region Bangladesh. observed structure primarily controlled magnitude seasonality river discharge entering delta. In moribund delta north Sundarbans, contour fresh brackish migrates seasonally ~20 ~40 km northward during dry season. Abrupt increases throughout response upstream discharge; prominence these events highlights their importance driving increases. Areas which better connected more voluminous seasonal (active delta), show greater recovery episodic inundations cyclones than those less-well flushed (moribund delta). Our reported observations provide baseline for understanding consequences informing climate-resilient adaptation strategies environments other mega-deltas.

Language: Английский

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Social‐ecological systems modeling for drought‐food security nexus

Sustainable Development, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

Abstract Droughts pose severe threats to social systems, particularly food security which is one of the priority targets in UN's sustainable development goals (SDG 2). The drought‐food insecurity nexus entails complex social‐ecological systems (SES) relationships (e.g., feedback) that underpin insecurity, leading disastrous consequence society. To advance knowledge on capturing SES nexus, an model was employed (first attempt) simulate these inform policies context climate change Bangladesh. Different “what if” scenarios were examined determining possible future trajectories system under socio‐economic and scenarios. Findings revealed (i) with business‐as‐usual scenario, crop production continue increase at expense declining water resources over simulation period; (ii) temperature changes (3.5–5.7°C) surface reduction due dam sustained groundwater decline may reduce (~55%); (iii) tipping risk increases when increasing (>3.5°C) combined upstream withdrawal (30%–50%), subsidy (50%–100%), population growth political instability. These indicate need for perspective security, simultaneously ensuring adaptation. findings are useful achieve other related SDGs (1&6) Bangladesh similar areas Kenya), informed by consequences plausible alternative futures.

Language: Английский

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