Evaluating the cumulative and time-lag effects of vegetation response to drought in Central Asia under changing environments

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 627, P. 130455 - 130455

Published: Nov. 11, 2023

Language: Английский

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Chronic increasing nitrogen and endogenous phosphorus release from sediment threaten to the water quality in a semi-humid region reservoir

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 931, P. 172924 - 172924

Published: April 30, 2024

Language: Английский

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Nitrogen removal in freshwater sediments of riparian zone: N-loss pathways and environmental controls

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Aug. 17, 2023

The riparian zone is an important location of nitrogen removal in the terrestrial and aquatic ecosystems. Many studies have focused on efficiency one or two processes zone, less attention has been paid to interaction different transformation impact situ environmental conditions. molecular biotechnology, microcosm culture experiments 15N stable isotope tracing techniques were used this research at Weinan section Wei River, reveal mechanism with multi-layer lithologic structure. results showed that rate was 4.14-35.19 μmol·N·kg-1·h-1. Denitrification, dissimilatory reduction ammonium (DNRA) anaerobic oxidation (anammox) jointly achieved natural attenuation process denitrification dominant (accounting for 59.6%). High dissolved organic nitrate ratio (DOC:NO3-) would promote denitrification, but when NO3- content than 0.06 mg/kg, DNRA occur preference denitrification. Furthermore, abundances functional genes (norB, nirS, nrfA) anammox bacterial 16S rRNA gene similar distribution patterns corresponding rates. Sedimentary NOX-, Fe(II), carbon (DOC) microbial abundance main factors affecting zone. Fe (II) promoted through dependent ferrous under mediation, DOC promotes enhancing effect. study can be management prevention control global pollution.

Language: Английский

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Rainfall driven nitrate transport in runoff of hilly area by combining time-series monitoring of hydrochemistry and stable isotopes

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132830 - 132830

Published: Feb. 1, 2025

Language: Английский

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Implementing Best Management Practices in Complex Agricultural Watersheds: Insights from High-Resolution Nitrogen Load Dynamics Analysis

Water, Journal Year: 2025, Volume and Issue: 17(6), P. 821 - 821

Published: March 12, 2025

Agricultural activities such as fertilization and cultivation constitute a substantial source of non-point (NPS) nitrogen (N) in aquatic ecosystems. Precise quantification fluxes across diverse land uses identification critical areas are essential for effectively mitigating loads. In this study, the Soil Water Assessment Tool (SWAT) was employed to accurately model watershed hydrology total (TN) transport Zhongtian River Basin, i.e., an agricultural characterized by low mountainous terrain. The simulation results indicated that average TN load intensity within 21.34 kg ha−1 yr−1, intensities paddy fields tea plantation were 34.96 33.04 respectively. land, which covered 32.06% area, disproportionately contributed 52.88% N output watershed. Pearson redundancy analysis (RDA) underscored use primary driver emissions, with contribution exceeding 50%. Building on high-precision analysis, suite best management practices (BMPs) established. These findings highlight superior performance engineered BMPs over BMPs, reduction rates 12.23 27.07% filter strips grassed waterways, Among three effect fertilizer most pronounced, achieving reductions 6.44% 21.26% nitrate. suggest optimizing implementing could significantly reduce pollution watersheds, providing valuable insights sustainable water quality management.

Language: Английский

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Multi-objective spatial optimization of pond system for diffuse pollution control of paddy field watershed in the middle reaches of the Yangtze River

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133250 - 133250

Published: April 1, 2025

Language: Английский

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Reactive transport of different dissolved organic nitrogen components in an unconfined aquifer in China

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 493, P. 138259 - 138259

Published: April 16, 2025

Language: Английский

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Contrasting effects of climate change on denitrification and nitrogen load reduction in the Po River (Northern Italy)

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(35), P. 48189 - 48204

Published: July 18, 2024

Abstract An increase in water temperature is one of the main factors that can potentially modify biogeochemical dynamics lowland rivers, such as removal and recycling nitrogen (N). This effect climate change on N processing deserves attention, it may have unexpected impacts eutrophication coastal zones. Intact sediment cores were collected seasonally at closing section Po River, largest Italian river inputs to Mediterranean Sea. Benthic oxygen fluxes, denitrification, dissimilatory nitrate reduction ammonium (DNRA) rates measured using laboratory dark incubations. Different treatments set up for each season based historical data future predictions. Higher temperatures enhanced demand extent hypoxic conditions benthic compartment, favoring anaerobic metabolism. Indeed, warming stimulated (NO 3 − ) processes, although NO organic matter availability found be controlling shaping between seasons. Denitrification was process responsible removal, mainly supported by diffusion from column into sediments, much more important than via DNRA. The predicted River due exert an negative feedback strongly denitrification contributing partial buffering export lagoons areas, especially spring. Graphical

Language: Английский

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Comprehensive evaluation of extreme hydrometeorological events coincidence and their interrelationships in the Hanjiang River Basin, China

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 638, P. 131506 - 131506

Published: June 14, 2024

Language: Английский

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Dynamic pollution management strategies and coordination in aquatic product supply chain under eco-compensation: Perspective of extreme weather crisis

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 122917 - 122917

Published: Oct. 17, 2024

Language: Английский

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