Comparative Analysis of Nonlinear Models from Different Domains: A Case Study on the Quality of Groundwater in an Alluvial Aquifer in Northwestern Croatia

Water, Год журнала: 2025, Номер 17(9), С. 1378 - 1378

Опубликована: Май 2, 2025

In groundwater quality analysis, nonlinear models are typically used, with domains spanning the entire real number line. this study, alongside these (Logistic, Gompertz and Richards), defined based on functions whose domain is only positive part of line presented (Michaelis–Menten, Hill 1 2 Rosin–Rammler 2). Two case studies were observed in paper: (i) dependence nitrate concentration pumping rate Bartolovec wellfield, (ii) distance from source pollution Varaždin wellfield. Both wellfields located alluvial aquifer northwestern Croatia. way, curves obtained basis mentioned mathematical fitted to experimental data. The results show a good fit, so that values coefficients determination R2 greater than 0.82 for study 0.96 (ii). Since differ parameters (e.g., three Michaelis–Menten five Rosin–Rammler), corrected Akaike information criterion (AICc) was used their comparison. best fit model, while (ii), it model. A t-test performed all models, they can be considered reliable at significance level 0.05. However, t-values p-values also calculated each parameter Based results, concluded model 0.05 both studies. For reason, generally demonstrates superiority restricted numbers 1, 1) over traditional Logistic, Richards) analysis. These findings offer practical tools predicting contaminant extremes maximum/minimum concentrations) optimizing management strategies.

Язык: Английский

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Impact of Artificial Light at Night (ALAN) on Cardiac Function and Acute Oxidative Stress Physiology in Migratory Brown Trout Smolts

Environmental Pollution, Год журнала: 2025, Номер 381, С. 126593 - 126593

Опубликована: Июнь 3, 2025

Light pollution poses significant ecological challenges for nocturnal animals reliant on natural light migration, orientation, and circadian rhythms. The physiological effects of abrupt exposure to artificial at night (ALAN) migratory fish, such as the experienced passing near illuminated infrastructures, remain poorly understood. This study investigates responses brown trout (Salmo trutta) smolts low-intensity (0.02 lx) short-term (30 seconds) ALAN, simulating migration conditions bridges. To evaluate influence social dynamics, were tested individually (solitary) or in groups six. Using continuous cardiac monitoring with data storage tags, alongside analyses oxidative stress markers adenylate kinase (AK) activity heart, we identified distinct patterns responses. Solitary fish exhibited heart rate variability (HRV) increases following repeated ALAN exposure, suggesting impaired regulation under exposure. In contrast, displayed consistently lower HRV over entire 90-minute experiment, implying that dynamics likely influenced a sustained response, corroborated by increased AK activity. Oxidative further reflected effects, upregulation key antioxidant enzymes (sod1, sod2, gpx1, gpx4) elevated lipid peroxidation, identifying lipids primary targets. observed divergence between superoxide dismutase (SOD) sod gene expression suggests adaptive post-transcriptional maintain redox balance combined environmental stress. These findings reveal can amplify stress, potentially affecting outcomes.

Язык: Английский

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Socioeconomic prerequisites determine national long-term biomonitoring efforts

Journal of Environmental Management, Год журнала: 2024, Номер 370, С. 122431 - 122431

Опубликована: Сен. 7, 2024

Язык: Английский

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Global concerns related to water biology and security: The need for language and policies that safeguard living resources versus those that dilute scientific knowledge

Water Biology and Security, Год журнала: 2023, Номер 2(4), С. 100191 - 100191

Опубликована: Июнь 22, 2023

Increasingly, scientists and non-scientists, especially employees of government agencies, tend to use weak or equivocal language when making statements related science policy governmental regulation. We recent publications provide examples vague versus strong authors write about regulating anthropogenic pressures on natural resources. Lifeless is common in agency reports, documents, even scientific papers published by academics. Such limits success This challenge must be recognized countered as a driver the condition water associated also list sources wording, global how ambiguous political influences have contributed resource degradation, discuss history censorship, offer possible solutions for more direct discourse. found that: (1) was concluding not only employees; (2) discussed confusing concerns an publication; (3) sometimes used active, language. Key drivers include: holding old paradigms resisting new knowledge; uncertainty; institutional manuscript review policies; (4) employment funding insecurity; (5) avoiding appearance advocacy. Examples with euphemistic included climate change, flow physical habitat alteration, dams, agriculture, mining, forestry, fisheries, well resistance towards monitoring, assessing, reporting ecological conditions. Suggestions mitigating involve protections greater focus ethics. conclude that should resist calls employ imprecise Instead, they advocates prescriptive protective actions—based their science—to halt reverse systemic degradation those

Язык: Английский

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Effect of climate change on the water quality of Mediterranean rivers and alternatives to improve its status

Journal of Environmental Management, Год журнала: 2023, Номер 348, С. 119069 - 119069

Опубликована: Окт. 9, 2023

Surface water (SW) quality is particularly vulnerable to increased concentrations of nutrients, and this issue may be exacerbated by climate change. Knowledge the effects temperature rainfall on SW required take necessary measures achieve good status in future. To address this, aims study were threefold: (1) assess how a changing alter nitrate, ammonium, phosphorus biological oxygen demand (BOD5) SW; (2) relationship between flow; (3) simulate diffuse point source pollution reduction scenarios Júcar River Basin District Mediterranean region. A regionalised long-term scenario was used following one Representative Concentration Pathway (RCP8.5) with data incorporated into coupling hydrological models. According these change scenarios, poor BOD5 are expected increase future factors 1.3, 1.9, 4 4, respectively. Furthermore, median ammonium concentration doubled months low flows. Additional maintain current bodies, it reduce at least 25% nitrate pollution, 50% loads phosphorus, BOD5.

Язык: Английский

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Coastal Water Quality Modelling Using E. coli, Meteorological Parameters and Machine Learning Algorithms

International Journal of Environmental Research and Public Health, Год журнала: 2023, Номер 20(13), С. 6216 - 6216

Опубликована: Июнь 24, 2023

In this study, machine learning models were implemented to predict the classification of coastal waters in region Eastern Macedonia and Thrace (EMT) concerning Escherichia coli (E. coli) concentration weather variables framework Directive 2006/7/EC. Six sampling stations EMT, located on beaches regional units Kavala, Xanthi, Rhodopi, Evros, Thasos Samothraki, selected. All 1039 samples collected from May September within a 14-year follow-up period (2009–2021). The parameters acquired nearby meteorological stations. analysed according ISO 9308-1 for detection enumeration E. coli. vast majority fall into category 1 (Excellent), which is mark high quality EMT. experimental results disclose, additionally, that two-class classifiers, namely Decision Forest, Jungle Boosted Tree, achieved Accuracy scores over 99%. addition, comparing our performance metrics with those other researchers, diversity observed using algorithms water prediction, such as Artificial Neural Networks Bayesian Belief demonstrating satisfactory results. Machine approaches can provide critical information about dynamic contamination and, concurrently, consider classification.

Язык: Английский

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An Assessment of Options to Improve the Removal of Excess Nutrients from European Wastewater

Water Air & Soil Pollution, Год журнала: 2023, Номер 234(9)

Опубликована: Сен. 1, 2023

Abstract In this contribution we quantify the potential to reduce discharge of excess nutrients with European wastewater, by modelling pollution, greenhouse gas emissions and costs measures under various scenarios. We analyse two types strategies, namely extending requirement nutrient removal broader areas increasing efficiency nitrogen phosphorus. As former strategy usually entails some infrastructural investment while latter an optimization existing processes, imply different costs, shows a better cost–benefit ratio. any case, actions are expected pay for themselves in terms benefits they bring abating water pollution (for nitrogen) emissions. Nitrogen becomes even more attractive whenever investments that assume may be avoided, thanks possibility optimized use infrastructure. Phosphorus become progress technologies its recovery from wastewater sludge, increase demand fertilizers other industrial uses.

Язык: Английский

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Looking back to move forward: Restoring vegetated canals to meet missing Water Framework Directive goals in agricultural basins

The Science of The Total Environment, Год журнала: 2023, Номер 905, С. 167331 - 167331

Опубликована: Сен. 23, 2023

Nitrate pollution and eutrophication remain pressing issues in Europe regarding the quality of aquatic ecosystems safety drinking water. Achieving water goals under Water Framework Directive (WFD) has proven to be particularly challenging agricultural catchments, where high nitrate concentrations are main reason for failure many bodies meet a good ecological status. Canals ditches common man-made features irrigated drained landscapes and, when vegetated, have recently been identified as denitrification hotspots. By combining experimental data GIS-based upscaling estimation, potential capacity canal network reduce loads was quantified several scenarios differing level extent length conservative management practices implemented. The analysis carried out lowlands Po River basin, which is largest hydrographic system Italy global hotspot nitrogen inputs eutrophication. Scenario simulations showed that maintaining vegetation at least 25 % length, selecting sites with availability (>2.4 mg N L-1), would promote greater permanent removal. increased load reduction target required achieve WFD status waters draining into Adriatic Sea during spring-summer months, risk higher. Promoting by postponing mowing in-stream end growing season could an effective mitigation strategy improve basins contribute achieving goals.

Язык: Английский

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Assessing the Effects of Multiple Stressors on Aquatic Systems across Temporal and Spatial Scales: From Measurement to Management

Water, Год журнала: 2021, Номер 13(24), С. 3549 - 3549

Опубликована: Дек. 11, 2021

Freshwater habitats are home to a disproportionately high biodiversity, given the total area they cover worldwide, hosting 10% of all species while occupying less than 1% Earth’s surface [...]

Язык: Английский

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ECOLOGICAL ASSESSMENT OF THE DNIPRO RIVER'S LARGEST TRIBUTARY WITHIN UKRAINE

Ukrainian Journal of Civil Engineering and Architecture, Год журнала: 2022, Номер 4, С. 65 - 76

Опубликована: Окт. 22, 2022

Problem statement. Water resources play a leading role in various aspects of human life. is needed for domestic, commercial, industrial, agricultural and recreational purposes not only Ukraine, but also the world. Ecological monitoring used to obtain holistic picture current ecological condition large administrative-territorial units industrialized countries world, particular even with gradual reduction industrial potential. Therefore, article analyzes qualitative composition surface water body, namely Desna River, largest tributary Dnieper, within determine changes its status. Possible causes pollution are determined. A statistical systematic analysis status was carried out based on data interactive map «Monitoring environmental assessment Ukraine» by State Agency Resources Ukraine period from January 2012 December 2020. Data intake control four posts River were investigated. The content main indicators: ammonium, nitrates, nitrites, phosphates sulfates analyzed. purpose article. Determination new temporal-spatial seasonal patterns quality change body according indicators. Possibility use obtained results as initial development influence mechanisms state conditions basin principle management. Conclusions. Analyzing research 2020, we can note tendency deteriorate Ukraine. cause this phenomenon man-made load bodies: tributaries. New trends 2020 distribution ammonium ions, nitrates sulfates, phosphates, along possibility using source implementing management further research. For it advisable establish additional observation points more detailed presentation between 2−3, 4–5 5–6, these areas has left right

Язык: Английский

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