2021
DOI: 10.1016/j.scitotenv.2021.148615
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Sources and transformation mechanisms of inorganic nitrogen: Evidence from multi-isotopes in a rural-urban river area

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Cited by 31 publications
(10 citation statements)
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“…High nitrogen leaching from soil would cause groundwater contamination and the eutrophication of surface water, especially in agricultural regions. Nitrogen transport processes and flux by streamflow are well elucidated in many basins based on chemical and isotopic data in China (Li et al, 2020; Wang et al, 2021; Ye et al, 2021). However, nitrates accumulated through vertical infiltration into deep soils have often been ignored (Jia et al, 2018; Sebilo et al, 2013; Wu et al, 2020a).…”
Section: Vertical Variations In Soil Nitrogen Dynamics In Different C...mentioning
confidence: 99%
See 1 more Smart Citation
“…High nitrogen leaching from soil would cause groundwater contamination and the eutrophication of surface water, especially in agricultural regions. Nitrogen transport processes and flux by streamflow are well elucidated in many basins based on chemical and isotopic data in China (Li et al, 2020; Wang et al, 2021; Ye et al, 2021). However, nitrates accumulated through vertical infiltration into deep soils have often been ignored (Jia et al, 2018; Sebilo et al, 2013; Wu et al, 2020a).…”
Section: Vertical Variations In Soil Nitrogen Dynamics In Different C...mentioning
confidence: 99%
“…In recent decades, Critical Zone Observatories (CZO) across different landscapes and land use types have been established to explore how CZs evolved and functioned under natural and anthropologic pressures (Brantley et al, 2017). Several CZOs that were highly impacted by human activities were established in China, including Red soil CZ with intensive human activities, Karst CZ with a fragile ecosystem, Loess CZ with highly eroded landform, and Peri-urban CZ with complex land use, to encourage research on earth surface system science and provide data on sustainable development for policymakers (Li et al, 2020; Qiao et al, 2018; Tahir et al, 2016; Ye et al, 2021). In these CZs, assessing the impact of human activities on the Critical Zone’s function and ecosystem services is key to a better understanding of the Critical Zone processes, which is of great significance for the sustainable development of human society and the required restoration and reconstruction of the ecosystem (Reid et al, 2010; Zhang et al, 2018).…”
Section: Introductionmentioning
confidence: 99%
“…Nitrogen pollution can be classified into nonpoint and point sources based on their transportation modes . Correspondingly, nitrogen runoff via soil erosion and leaching comprise the main transport pathways of contaminants from nonpoint sources into rivers; contaminants from point sources tend to flow directly into rivers via pipe networks . Owing to the differences in hydrological, physicochemical, and biotic conditions between the two distinct transport modes, the microbial composition and functionality in rivers in nonpoint source-dominated areas (NPSDAs) might differ from those in point source-dominated areas (PSDAs) .…”
Section: Introductionmentioning
confidence: 99%
“…15 Correspondingly, nitrogen runoff via soil erosion and leaching comprise the main transport pathways of contaminants from nonpoint sources into rivers; contaminants from point sources tend to flow directly into rivers via pipe networks. 16 Owing to the differences in hydrological, physicochemical, and biotic conditions between the two distinct transport modes, the microbial composition and functionality in rivers in nonpoint source-dominated areas (NPSDAs) might differ from those in point source-dominated areas (PSDAs). 1 Therefore, elucidating the mechanism of water self-purification requires further clarification regarding microbial characteristics under various contaminant transport modes.…”
Section: Introductionmentioning
confidence: 99%
“…However, numerous anthropogenic activities, such as wastewater/industrial discharge, atmospheric deposition, stormwater runoff, water diversions/consumption, and channelisation/bank reinforcement, negatively impact the natural ecological characteristics of urban rivers. Frequent studies report that organic, metal, sediment and nutrient pollutants impair the water quality and ecological health of urban river networks (Dong & Xu, 2019; Schliemann et al, 2021; Ye et al, 2021; Zhang et al, 2015).…”
Section: Introductionmentioning
confidence: 99%