AI-assisted surface water dynamics analysis in the Indochina Peninsula integrating Landsat-8 and Sentinel-2 imagery

Seasonal variations in sources and dynamics of surface water-groundwater nitrate in a plain river network area: Based on hydrochemical, dual isotope approach and feature importance interpretation.

On-board determination and ecological risk of Cu species in Yellow River Estuary.

Spatiotemporal patterns of gross alpha and beta radioactivity in surface water and tap water and implications for radiological exposure: A 12-year study in Beijing, China.

A high-resolution record of long-term variations in detrital input, chemical weathering, freshwater influx, and palaeoproductivity from a pelagic environment of the Western Tethys spanning the late Aptian to late Cenomanian (~25 million years) is presented, based on quantitative elemental data from the Umbria-Marche Basin (Monte Petrano section and Piobbico Core, central Italy). This interval captures a major environmental transition from the multicolored marlstone and black shale-dominated sediments of the Marne a Fucoidi Formation to the extensive limy deposits of the Scaglia Bianca Formation but also highlights three main distinct palaeoenvironmental phases during the deposition of the Marne a Fucoidi. During the late Aptian cooling episode, semi-arid conditions prevailed, with surface waters being oligo- to mesotrophic and stratified, while bottom waters remained oxygenated. A marked warming started at the Aptian/Albian boundary paralleled by increased surface water fertility and seafloor deoxygenation. The early to middle Albian experienced intensified weathering and nutrient supply under warm and humid conditions, fostering meso- to eutrophic conditions and promoting the deposition of alternated marlstones and black shales. A major transition took place in the late Albian, with the emergence of arid conditions that reduced runoff and chemical weathering, coinciding with progressively more oligotrophic surface waters and a stable thermocline that persisted until just prior to the onset of Oceanic Anoxic Event 2 in the latest Cenomanian. • Late Aptian dominated by semi-arid, cooler, oligo-mesotrophic conditions. • Early–middle Albian characterized by humid, warmer, meso- eutrophic conditions. • Late Albian–Cenomanian with prevailing arid, warm, oligotrophic conditions. • Onset of limy sedimentation corresponds to runoff cease and stratified water masses.

Sources and fate of parent and derivative PAHs in urban-industrial watersheds: A case study in Changzhou, China

Spatiotemporal variations in dissolved organic matter chemistry in reservoir-river continuums formed by cascade low-head dams: A case study in southwest China.

Evaluating solar potential and hydro-photovoltaic hybrid system prospects in a Brazilian hydropower reservoir

Processes and driving mechanisms of drought propagation in Central Asia: A coupled perspective of meteorological, surface water, agricultural, and groundwater drought

Embryonic exposure to environmentally relevant concentrations of PFAS cause larval fish to be more susceptible to predation.

Climate change-induced shocks, particularly drought, are more prevalent and causing drastic changes in farming and livelihood in the Barind Tract region of Bangladesh. Therefore, this study aims to identify drought shocks experienced by farmers, investigate their coping strategies, and develop a contextualized Composite Coping Strategy Index (CCSI). A mixed-method approach combining FGDs and KIIs, followed by a structured survey (351 respondents ) was carried out across the two most drought-prone upazilas: Tanore and Nachol, in the Rajshahi and Chapainawabganj districts of Bangladesh. Quantitative data were analyzed using regression models, while qualitative data enriched contextual understanding using thematic and narrative analysis. The study found twelve drought effects along with fourteen coping strategies against drought. Findings reveal that groundwater depletion and loss of crop yield are the most severe impacts of drought. Coping strategies ranked highest included deep tube well water extraction and cultivating less water-intensive crops, while water preservation through storage in tanks and intercropping practices were the least used coping strategies. Regression analysis confirmed that extension media contact (β=0.263, p<0.001), drought impact on agriculture (β=0.257, p<0.001), and drought impact on livelihood (β=0.157, p<0.001) significantly influenced farmers’ adoption of coping strategies, while demographic factors showed minimal predictive effect. These findings emphasize the urgency of targeted policy interventions to enhance drought resilience through sustainable water use, diversified livelihoods, and inclusive resource access in vulnerable farming communities. Promoting sustainable water management, alternative income sources, and farmer-led innovations can substantially improve adaptation in drought-prone regions. • Groundwater depletion is the most severe impact of drought. • Water reuse practices remain limited in the region. • Water recycling, rainwater harvesting, and surface water use should be encouraged. • Localized early weather warning systems and climate services should be expanded. • Precision irrigation, re-excavation of canals, buried-pipe should be promoted.

The Elbe Estuary (Germany) stretches 142 km from the weir in Geesthacht to the North Sea. It is classified as mesotidal, partially mixed and heavily impacted by anthropogenic activities and modifications. Despite well-documented changes in ecosystem status, little is known about the microbial community in its surface water. In this study, we used 16S rDNA sequencing to characterise bacterial communities in surface water of the Elbe Estuary. Samples were collected across three seasons (winter, spring, and summer) in 2021 and 2022, to assess the relationship between environmental factors and bacterial community structure. Our analyses revealed that bacterial community diversity and composition varied seasonally and along the estuary stretch and were closely linked to physicochemical properties. Alpha diversity was highest in winter and in oligohaline samples. Distance-based redundancy analysis showed that salinity, discharge, temperature, inorganic nitrogen (NO2), and silicate are key factors in shaping the bacterial community compositions. Although spatial differences were observed, seasonal variation was the main determinant of bacterial diversity and community structure. Overall, our results show that anthropogenic pressures and seasonal changes are reflected in a dynamic microbial community with metabolic functions strongly shaped by human activity.

Baseline radiological environmental monitoring and impact assessment of radioactive waste storage facilities in Thailand

Effect-based methods (EBMs) may be included in the European Water Framework Directive (WFD) to evaluate estrogenic substances. The European Commission's Joint Research Centre conducted an interlaboratory study to assess estrogenic EBMs and effect-based trigger (EBTs) values derived using three options: (1) linking the EBT value to environmental quality standards (EQS), (2) correlating in vitro and in vivo data, and (3) averaging bioassay-specific EBT values. Surface water samples from eight Northern-Italian sites containing estrogenic hormones and endocrine-disrupting chemicals (EDCs) were analysed by fourteen laboratories employing EBMs, while four laboratories performed chemical analysis. Chemical data indicated cumulative risk in several samples, with estrone and bisphenol A identified as main drivers. All EBMs detected estrogenic activity, but specificity differed: some bioassays responded mainly to hormones, whereas others also responded to non-hormonal EDCs. EBMs flagged estrogenic risk in a sample that showed no individual exceedances of EQS. Applying EBT option 1 yielded the highest concordance with chemical results, achieving full compliance in eight bioassays and proven to be the most protective. Indeed, option 2 reduced the risk quotient (RQ) by>30%, leading to two bioassays in full compliance, while Option 3 resulted in RQ changes (<20%) for most EBMs, with seven bioassays in full compliance with chemical analysis. The study underscores the need to harmonise EBMs - including data evaluation - to address chemical mixtures and provides recommendations for Member States on their application in the WFD. Integrating EBMs with conventional monitoring enhances protection against cumulative estrogenic risks from both hormones and EDCs.

Anthropogenic particles ingestion by fish larvae in important nursery areas of Iberia (South Europe).

Use of Surface Water and Ocean Topography (SWOT) observations to support Land Use/Land Cover (LULC) change products: the case of the pacific coast of Ecuador

Spatiotemporal response of depth‑to‑water table (ZWT) to the Three Gorges Reservoir impoundment across hydrological year types

Zoonotic risk of transmission of Giardia duodenalis from water resources; Worldwide molecular and network analyses.

Modeling the transmission of β-lactam-resistant Escherichia coli through lettuce: A quantitative microbial exposure assessment integrating environmental and postharvest factors.

Bottom grinding (BG), which suspends the anaerobic microorganisms deposited at the bottom of the pond through aeration, is a common practice in sea cucumber aquaculture for maintaining water quality. However, little is known about the effects of BG on the environmental microbiome. This study investigated differences in bacterial communities from three niches (surface water, bottom water and sediments) of culture ponds with and without BG operations. Only minor changes in sediment bacterial communities were observed between BG-treated and control ponds. In contrast, the composition of the bacterial communities in the water was also significantly altered by the BG operation, with an increase in Cyanobacteria and a decrease in Proteobacteria. Additionally, functional prediction revealed increased phototrophy and decreased chemoheterotrophy in aquatic bacterial communities following BG treatment. Co-occurrence network analysis revealed that bacterial communities in all three niches were more complex but unstable with BG treatment compared to without, indicating some remedial operations for farming practice. Analysis of community assembly mechanisms showed increased stochastic assembly of bacterial communities in all three niches induced by BG treatment. Overall, this study revealed the effects of BG operation on the bacterial communities in culture ponds, providing insights into the ongoing evolution of farming techniques.