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Papers
61,005 resultsShowing papers similar to Hydrochemical Evolution and Nitrate Source Identification of River Water and Groundwater in Huashan Watershed, China
ClearCombining the multivariate statistics and dual stable isotopes methods for nitrogen source identification in coastal rivers of Hangzhou Bay, China
Researchers combined dual stable isotope analysis with statistical modeling to trace nitrogen pollution sources in two coastal rivers flowing into Hangzhou Bay, finding that soil runoff and domestic wastewater together contributed roughly two-thirds of total nitrogen, with aquaculture tailwater as the second-largest source.
Identification of Hydrochemical Characteristics, Spatial Evolution, and Driving Forces of River Water in Jinjiang Watershed, China
This paper is not about microplastic pollution. It analyzes the hydrochemical characteristics of river water in the Jinjiang Watershed in China, identifying rock weathering, mining, agricultural runoff, and domestic pollution as the main factors influencing water chemistry.
Hydrochemical process and controls on the hydrochemistry of river water in the Muling-Xingkai Plain, Northeast China
Researchers analyzed the hydrochemical composition of 33 river water samples from the Muling-Xingkai Plain in northeast China to identify the dominant processes controlling water chemistry. Principal component analysis revealed that weathering of carbonate and silicate rocks was the primary natural control, with agricultural and industrial activities adding elevated nitrogen and sulfate in some areas.
Evaluation of nitrate pollution sources in surface water across the typical rural-urban interface: a case study of Wen-Rui Tang River, China
Researchers identified the main sources of nitrate pollution in a rural-urban Chinese river, finding that human sewage and agricultural runoff were the primary contributors. While focused on nitrogen pollution, the study illustrates how mixed land use creates complex water quality challenges in rivers that also carry microplastics.
Analysis of hydrochemical characteristics and genesis of water-deficient rivers in China: a case study of the Ciyao River Basin in Shanxi Province
This study analyzed the chemical characteristics and origins of water in the Ciyao River Basin, a water-scarce region in China's Shanxi Province. Researchers collected water samples across wet, normal, and dry seasons and found that the water chemistry was influenced by both natural rock weathering and human activities. The findings provide baseline data for managing water quality in regions where water scarcity makes understanding pollution sources especially critical.
Isotope hydrology and water sources in a heavily urbanized stream
Researchers used water stable isotope sampling across the heavily urbanized Panke catchment in Berlin to partition stream water sources, finding that the upper catchment is dominated by groundwater while lower sections reflect a more complex mixture of engineered and natural flow paths. The study demonstrates how isotope hydrology can disentangle hydrological sources in city streams with complex engineered infrastructure.
Assessment of the groundwater recharge processes of a shallow and deep aquifer system (Maggiore Valley, Northwest Italy): a hydrogeochemical and isotopic approach
Researchers analyzed water chemistry and isotopes across shallow and deep groundwater systems in northwest Italy, tracing how water from distant mountain recharge zones mixes before reaching a heavily used drinking water well field. The study clarifies potential pathways for pollutants to reach drinking water supplies, providing critical information for protecting this major regional water resource.
Study on the characteristics of water chemistry evolution in typical alpine karst basins
Researchers analyzed water chemistry evolution in alpine karst groundwater systems, tracing how geological and hydrological processes shape ion concentrations and water quality in these vulnerable freshwater sources.
Assessment of Hydrochemical Variability in the Svete River and Its Tributaries Under Anthropogenic Pressure
Researchers assessed the hydrochemical variability of the Svete River and its tributaries under anthropogenic pressure, monitoring sixteen sites along the main channel and tributary junctions in intensive agricultural regions. The study revealed how tributary inflows alter the hydrochemical properties of the main channel, documenting the cumulative impact of agricultural land use on river water quality.
Deciphering the spatiotemporal dynamics and source characteristics of nutrients under anthropogenic pressure in Taipu River, China
Researchers assessed seasonal and spatial nutrient dynamics in Taipu River (China) from October 2020 to July 2021 using water quality indices and principal component analysis. Results identified agricultural runoff and sewage as dominant nutrient sources, with spatial patterns reflecting land use along the river.
Estimating Groundwater Recharge and Precipitation Sources of the Zamora River Basin, Southeastern Ecuador, by Using GIS and Stable Isotopes
This paper is not about microplastics; it uses stable isotopes and GIS-based water balance models to study groundwater recharge mechanisms in the Zamora River Basin in Ecuador.
Analysis of the Interaction between Lake and Groundwater Based on Water–Salt Balance Method and Stable Isotopic Characteristics
Researchers analyzed the interaction between Wuliangsu Lake and surrounding groundwater in the Yellow River basin using water-salt balance methods and stable isotopic characteristics, examining how irrigation drainage from the Hetao Irrigation District influences lake water chemistry and ecology. The study found that discharge from agricultural irrigation significantly altered the water-salt dynamics of the lake, contributing to salinization and affecting the lacustrine ecosystem.
Spatial distribution and source apportionment of nitrogen in typical plain river networks and bacterial community response
This study characterized nitrogen types and bacterial community responses across typical plain river networks with different pollution sources (domestic, agricultural, aquaculture), finding that diverse nitrogen speciation in domestically polluted areas drove greater nitrogen cycling gene abundance and more complex bacterial ecological networks.
Anthropogenic land uses shape denitrification-related microbial communities in freshwater river ecosystems
Researchers investigated how anthropogenic land uses (agricultural and urbanized) versus natural land uses shape denitrification-related microbial communities in the Weihe and Hanjiang Rivers in China's Qinling Mountains using deep 16S rRNA gene sequencing of water and sediment samples. Results revealed that land-use type significantly alters the composition and function of nitrogen-cycling microbial communities in freshwater river ecosystems.
A Hydrochemical Study of Groundwater Salinization in Qinzhou Bay, Guangxi, Southern China
Researchers investigated the causes of increasing groundwater salinization in Qinzhou Bay, China, collecting 110 water samples to trace hydrochemical signatures and identify the mechanisms driving saltwater intrusion since 2013. The findings aim to support better water resource management in the affected coastal agricultural region.
Characteristics of Hydrochemistry and Stable Isotopes in a Karst Region in Samcheok, Republic of Korea
This study monitored water chemistry and stable isotopes in a karst region in South Korea across different seasons and years, finding that land use and seasonal variation strongly influenced groundwater quality. Karst aquifers are vulnerable to contamination from surface runoff, including microplastics from agricultural and urban sources.
Hydrological Connectivity Patterns and Their Eco-hydrological Implications in the Dasha River, China
This study used graph theory and isotope tracing with weekly eco-hydrological monitoring to assess hydrological connectivity and ecological impacts in the heavily modified Dasha River, Shenzhen, providing a methodological framework for urban river management.
Study on the Influence of Mining Activities on the Quality of Deep Karst Groundwater Based on Multivariate Statistical Analysis and Hydrochemical Analysis
This study examined how long-term coal mining activities in China affected deep karst groundwater chemistry, finding significant changes to water quality that threaten safe drinking water supply in mining regions.
Groundwater–Surface Water Interactions: Recent Advances and Interdisciplinary Challenges
This review covers recent advances in understanding groundwater–surface water interactions, including their importance for drinking water security and contaminant transport, and argues for interdisciplinary approaches that combine hydrology, ecology, and geochemistry.
Spatial and temporal variabilities of suspended sediment and dissolved nutrients in the Ca River basin, North Central Vietnam
Researchers monitored suspended sediment and dissolved nutrient levels in the Ca River basin spanning Vietnam and Laos over a full year, finding significant spatial and seasonal variability driven by rainfall patterns and land use across this transboundary watershed.
Water Quality Evaluation, Spatial Distribution Characteristics, and Source Analysis of Pollutants in Wanquan River, China
This paper is not about microplastics — it assesses water quality in a Chinese river basin, finding that agricultural runoff and domestic sewage are the main pollution sources, without examining plastic contamination.
Application of Water Stable Isotopes for Hydrological Characterization of the Red River (Asia)
Water stable isotopes were used to characterize the hydrology of the Red River in Asia, showing how human land use changes have altered natural water flow patterns. Understanding altered hydrological cycles helps predict how microplastics and other pollutants move through river systems.
Deciphering geospatial variations in water quality of a perennial river for human consumption and agricultural application
Researchers analyzed geospatial variation in water quality along a perennial river to assess human health risks from drinking water exposure, identifying hotspots of contamination exceeding safety thresholds. The study provides a risk-based framework for prioritizing water treatment interventions.
Microplastic pollution in sophisticated urban river systems: Combined influence of land-use types and physicochemical characteristics
This study assessed microplastic pollution across an urban river network in China, finding that land-use type and water physicochemical properties jointly influence microplastic distribution, with industrial and residential areas contributing highest loads.