Seasonal Variations in Groundwater Quality under Different Impacts Using Statistical Approaches

Civil Engineering Journal, Год журнала: 2023, Номер 9(3), С. 497 - 511

Опубликована: Март 1, 2023

The objective of this study was to evaluate seasonal fluctuations in groundwater quality, determine the effects different stressors on resource, and recognize potential pollution sources a coastal region southern Vietnam. Eleven samples collected Ben Tre province during dry wet seasons were then analyzed for sixteen parameters, including pH, total dissolved solids (TDS), salinity, hardness (TH), ammonium (NH₄⁺-N), nitrite (NO₂ˉ-N), nitrate (NO₃ˉ-N), sulfate (SO₄²ˉ), chloride (Clˉ), iron (Fe), manganese (Mn), lead (Pb), mercury (Hg), arsenic (As), coliforms, Escherichia coli (E. coli). Pearson correlation analysis, principal component analysis (PCA), cluster (CA) employed. results indicated that solids, hardness, Clˉ, E. coliform detected as contaminants samples. trend parameters mostly higher season. Which Mn significantly fluctuated between seasons. Activities industrial-craft areas, landfills seawater-intruded areas negatively impacted typically TDS E.coliat landfill area. Six components obtained from PCA could explain 93.6% variance, all are responsible variations quality. Geology, discharged wastewater, leachate, agricultural activities, saltwater intrusion can be considered representative factors. CA grouped into four clusters based similarity water properties. showed locations each have outstanding quality characteristics, I III high II has IV sets with salinity. This is promised partially fill gap comprehensive information so policymakers develop sustainable management strategies future. Doi: 10.28991/CEJ-2023-09-03-01 Full Text: PDF

Язык: Английский

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Revealing the drivers and genesis of NO3-N pollution classification in shallow groundwater of the Shaying River Basin by explainable machine learning and pathway analysis method

The Science of The Total Environment, Год журнала: 2024, Номер 918, С. 170742 - 170742

Опубликована: Фев. 8, 2024

Язык: Английский

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Seasonal nitrate input drives the spatiotemporal variability of regional surface water-groundwater interactions, nitrate sources and transformations

Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 132973 - 132973

Опубликована: Фев. 1, 2025

Язык: Английский

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Optimal nitrogen management to achieve high wheat grain yield, grain protein content, and water productivity: A meta-analysis

Agricultural Water Management, Год журнала: 2023, Номер 290, С. 108587 - 108587

Опубликована: Ноя. 14, 2023

Nitrogen (N) addition is commonly employed to enhance wheat production, and the effectiveness strongly influenced by site-specific factors encompassing environmental conditions crop management practices. However, current understanding fails adequately account for intricate variable interactions among these factors. Consequently, we conducted a global meta-analysis quantify combined contributions of yield, grain protein content (GPC), water productivity (WP) provide recommendations optimizing N management. The results revealed significant improvement in yield (14.85%), GPC (6.62%), WP (10.79%) following application N. Moreover, higher rates, utilization coated fertilizer, post-anthesis fertilization, multiple applications exhibited enhanced outcomes terms GPC, systems. It was observed that applying 100–200 kg/ha optimal rate maximizing WP. Medium soil texture humid climate showed more pronounced increase response addition. Additionally, demonstrated stronger benefits when annual temperature below 14 °C, while with temperatures exceeding °C. Furthermore, adopting common fertilization practices alongside irrigation implementing pre-anthesis medium also contributed achieving performance. finding this study serves as guideline support on-site practice offer reference policy design across specific site conditions.

Язык: Английский

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Nitrogen in soil, manure and sewage has become a major challenge in controlling nitrate pollution in groundwater around plateau lakes, Southwest China

Journal of Hydrology, Год журнала: 2023, Номер 620, С. 129541 - 129541

Опубликована: Апрель 21, 2023

Язык: Английский

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Effect of nitrogen fertilisation on yield and protein content of durum wheat ( Triticum durum Desf ) cultivated in the Constantine region of Algeria

International Journal of Environmental Studies, Год журнала: 2025, Номер unknown, С. 1 - 13

Опубликована: Янв. 2, 2025

The study aims to assess the impact of nitrogen fertilisation on yield and agronomic characteristics durum wheat (Triticum Desf) in Constantine's semi-arid region during 2021/2022 season. Conducted at Centre for Biotechnology Research, experiment used a randomised design with three levels: T0 (starting dose), T1 (64 units N ha–1), T2 (110 ha–1). Measurements included grain yield, thousand weight, vitreousness rate, moisture content, specific protein content. achieved highest (31.29 q ha–1) content (15.3%). had weight (53.32 g) optimal (9.54%) (80.7 kg hl–1). Higher doses reduced mitadinage increasing yield.

Язык: Английский

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Optimizing Nitrogen for Sustainable Yield and Efficiency: Insights from Shouguang Facility-Grown Tomatoes

Agronomy, Год журнала: 2025, Номер 15(2), С. 420 - 420

Опубликована: Фев. 7, 2025

Facility-based agriculture has rapidly advanced due to its capacity for high-intensity and year-round crop cultivation. This study evaluated the effects of different nitrogen fertilizer application rates on growth greenhouse tomatoes, while utilizing 15N tracing technology explore utilization efficiency during process facility-grown tomatoes. The results indicate that within range N60–N80 (93–128 kg N ha−1) can optimally balance yield, nitrogen-use efficiency, growth. Application exceeding this do not enhance yield lead reduced efficiency. Tomato plants exhibited a low requirement seedling stage, relying primarily native soil stocks flowering stage. Fertilizer-derived use increased fruiting These findings demonstrate excessive inputs diminishing returns potential nutrient imbalances, fully stages is essential. emphasizes importance adjusting input according developmental optimize resource utilization.

Язык: Английский

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Quantifying and assessing nitrogen sources and transport in a megacity water supply watershed: Insights for effective non-point source pollution management with mixSIAR and SWAT models

Agricultural Water Management, Год журнала: 2023, Номер 291, С. 108621 - 108621

Опубликована: Дек. 6, 2023

The expansion and intensification of human activities have resulted in excessive nitrogen (N) rivers, causing worldwide concern. To effectively manage agricultural non-point source pollution ensure a safe drinking water supply watersheds, it is crucial to trace quantify the primary sources spatial distribution patterns N. In response challenge unclear pollution, this study utilised Bayesian isotope mixing model Soil Water Assessment Toolmodel identify dominant nitrate transformation processes. These models were employed N retention by mainstream tributaries Bai River Basin, which directly impacts safety Beijing. Total (TN) concentrations Yunzhou Reservoir (4.22 ± 0.04 mg.L˗1) Miyun (2.88 0.62 inlets autumn winter V class (2 category as per GB 3838–2002 standards. This implies higher risks eutrophication algal blooms exceeding standards at individual points seasons River. Fertilisers main contributing 44.6% during dry season 62.9% wet season, suggesting that more susceptible leaching runoff rainy periods. Rainfall was not major contributor, with only 3.2% 2.9% originating from Hebei Beijing areas River, respectively. Annually, Basin exports loads approximately 629.3 t.a˗1 TN 433.7 organic (Org-N) land river. Org-N final destination 521.3 100.3 t.a˗1, Of exported Org-N, 17.16% 76.87%, respectively, retained river network. Consequently, occurred nitrification–denitrification being particularly dominant. Nitrification evident nitrate-enriched

Язык: Английский

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Appropriate stoichiometric ratios of dissolved organic carbon and nitrate can trigger a transition in nitrate removal in groundwater around plateau lakes, Southwest China

The Science of The Total Environment, Год журнала: 2024, Номер 916, С. 170313 - 170313

Опубликована: Янв. 25, 2024

Язык: Английский

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Agronomic responses and economic returns from wheat–canola rotation under Humalite and urea applications

Agronomy Journal, Год журнала: 2024, Номер unknown

Опубликована: Сен. 9, 2024

Abstract Humalite is a humic acid‐rich biostimulant known for its ability to improve plant agronomic parameters and increase crop nitrogen use. Limited field research exists on effect, application rate, interaction with urea, especially at reduced rates grain parameters. Therefore, study was conducted from 2021 2023 three Alberta sites—Battle River Research Group (BRRG), Gateway Organization (GRO), St. Albert Station (St. Albert), in split‐plot design four replications, urea levels (i.e., recommended, half‐recommend, zero urea) combined five (0, 56 (or 112), 224, 448, 896 kg ha −1 ). In 2021, the highest wheat yields were observed half plus 224 BRRG (35% yield increase), GRO (8.4% (33.5% increase). 2022, canola unaffected by rates. 2023, half‐recommended recommended plots outperformed across all sites, regardless of The protein content values 224–448 or rate. Depending site, net revenue resulted between 112 448 wheat, that is, optimal rate increased profitability. incorporation biostimulants such as can reduce use contribute sustainability cropping systems.

Язык: Английский

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