Aging deterioration of mechanical properties on coal-rock combinations considering hydro-chemical corrosion

Energy, Год журнала: 2023, Номер 282, С. 128770 - 128770

Опубликована: Авг. 17, 2023

Язык: Английский

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Increasing Nickel Concentrations in a Large River Network of South Tyrol, Eastern European Alps

ACS ES&T Water, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Climate change and cryosphere degradation may enhance the concentrations of heavy metals in high-mountain rivers. However, downstream export these contaminants to lower elevations is still overlooked. In this study, we investigated spatial temporal patterns dissolved bioavailable nickel upper Etsch/Adige river basin (1590 km2; 54 sites) during period 2005–2023. Furthermore, same seasonally (2022–2023) along a tributary (Schnals/Senales River), from glacier origin down confluence with Etsch River (13 sites). Concentrations both forms increased past decade by up 4 times, yet only reaches draining acidic metamorphic Ötztal Unit. Sulfide oxidation, more intense at sites featuring larger glaciers, rock permafrost extent their catchment, enhanced concentrations. Along Schnals River, values were elevated proglacial waters (dissolved fraction 112 μg L–1), gradually decreased moving elevations, dropped (from 20 30 2–5 L–1) large reservoir. Currently, exceed EU environmental quality standards 40% sites, demonstrating sharp implications that be extended other similar geological cryospheric settings.

Язык: Английский

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Rising Temperatures Drive Lower Summer Minimum Flows Across Hydrologically Diverse Catchments in British Columbia

Water Resources Research, Год журнала: 2025, Номер 61(2)

Опубликована: Фев. 1, 2025

Abstract Excessively low stream flows harm ecosystems and societies, so two key goals of low‐flow hydrology are to understand their drivers predict severity frequency. We show that linear regressions can accomplish both across diverse catchments. analyze 230 unregulated moderate high relief catchments rainfall‐dominated, hybrid, snowmelt‐dominated, glacial regimes in British Columbia, Canada, with drainage areas spanning 5 orders magnitude from 0.5 55,000 km 2 . Summer decreasing rainfall‐dominated hybrid but have been stable remain snowmelt or glacial‐dominated. However, we find since 1950 approximately one third snowmelt‐dominated transitioned a rain‐snow regime. The declines dominantly driven by summer precipitation temperature, only weakly influenced winter storage. apply this understanding create regression models the minimum flow using monthly temperature data. These outperform distributed process‐based for every common goodness‐of‐fit metric; performance improvement is mostly result abandoning requirement simulate all parts annual hydrograph. Using these reconstruct streamflow droughts anomalies 1901 2022. reproduce recent drying trends catchments, also present conditions comparable those seen hundred years ago. anomalously last century were caused large deficits while current rising temperatures despite near‐normal precipitation.

Язык: Английский

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Relative contribution from different water sources to supraglacial runoff in western Himalaya

Journal of Hydrology, Год журнала: 2024, Номер 635, С. 131137 - 131137

Опубликована: Март 27, 2024

Язык: Английский

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Factors controlling the water quality of rock glacier springs in European and American mountain ranges

The Science of The Total Environment, Год журнала: 2024, Номер 953, С. 175706 - 175706

Опубликована: Авг. 27, 2024

Rock glaciers (RGs) provide significant water resources in mountain areas under climate change. Recent research has highlighted high concentrations of solutes including trace elements RG-fed waters, with negative implications on quality. Yet, sparse studies from a few locations hinder conclusions about the main drivers solute export RGs. Here, an unprecedented effort, we collected published and unpublished data rock glacier hydrochemistry around globe. We considered 201 RG springs ranges across Europe, North South America, using combination machine learning, multivariate univariate analyses, geochemical modeling. found that 35 % issuing intact RGs (containing internal ice) have quality below drinking standards, compared to 5 connected relict (without ice). The interaction ice bedrock lithology is responsible for springs. Indeed, higher sulfate sourcing originating RGs, mostly specific lithological settings. Enhanced sulfide oxidation elevated element concentrations. Challenges management may arise catchments rich where predisposing geology would make these hotspots. Our work represents first comprehensive attempt identify waters.

Язык: Английский

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Cryosphere and land cover influence on stream water quality in Central Asia's glacierized catchments

The Science of The Total Environment, Год журнала: 2024, Номер 939, С. 173525 - 173525

Опубликована: Май 27, 2024

Язык: Английский

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Ecological “Windows of opportunity” influence biofilm prokaryotic diversity differently in glacial and non-glacial Alpine streams

The Science of The Total Environment, Год журнала: 2024, Номер 944, С. 173826 - 173826

Опубликована: Июнь 12, 2024

Язык: Английский

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Water–Rock Interaction and Freeze–Thaw Cycles as Drivers of Acid Rock Drainage Generation by a Rock Glacier in the European Alps

ACS ES&T Water, Год журнала: 2024, Номер 4(12), С. 5264 - 5274

Опубликована: Ноя. 13, 2024

Little is known to date about the processes governing natural acid rock drainage (NARD) generated by glaciers. We used paragneiss samples from a catchment with NARD glacier in Italian Alps for long-term leaching experiments under conditions that are possible within The findings clearly suggest at low neutralization capacity of rock, dissolution sulfide minerals, even if they present trace amounts, may be most important process controls groundwater acidity 1 °C, typical temperature discharge acidic increase solubility and mobility aquifer lithology-specific elements, concentrations some heavy metals geogenic origin (e.g., Mn Ni) greatly exceed health standards after six month interaction water paragneisses. Diurnal freeze–thaw cycles were found 6–7 times more effective transformation coarse fragments fine-grained debris fresh, reactive mineral surfaces, compared temperatures above freezing. Cyclic freezing favors an enhanced formation amorphous silica, highly adsorbent metal ions, its redissolution unfrozen layers glaciers represent additional source elements.

Язык: Английский

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Radium fingerprinting traces hydrology of the global cryosphere under climate warming

Global and Planetary Change, Год журнала: 2024, Номер 244, С. 104654 - 104654

Опубликована: Ноя. 26, 2024

Язык: Английский

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Factors Controlling the Water Quality of Rock Glacier Springs in European and American Mountain Ranges

Опубликована: Янв. 1, 2024

Язык: Английский

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