DOI: 10.1016/j.watres.2018.04.020
Scopus记录号: 2-s2.0-85047390386
论文题名: Using river sediments to analyze the driving force difference for non-point source pollution dynamics between two scales of watersheds
作者: Ouyang W. ; Yang W. ; Tysklind M. ; Xu Y. ; Lin C. ; Gao X. ; Hao Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 139 起始页码: 311
结束页码: 320
语种: 英语
英文关键词: Diffuse pollution
; Heavy metal
; Modeling
; Sedimentary history
; Spatial scale effect
; Watershed comparison
Scopus关键词: Heavy metals
; Land use
; Metal analysis
; Models
; Nitrogen
; Phosphorus
; River pollution
; Sedimentology
; Sediments
; Watersheds
; Climatic conditions
; Diffuse pollution
; Hydrological patterns
; Nitrogen and phosphorus
; Non-point source pollution
; Spatial scale
; Transportation process
; Vertical distributions
; Loading
; arsenic
; nitrogen
; phosphorus
; zinc
; heavy metal
; lead
; Lead-210
; nitrogen
; phosphorus
; comparative study
; concentration (composition)
; fluvial deposit
; flux measurement
; heavy metal
; modeling
; nonpoint source pollution
; pollutant transport
; scale effect
; sediment core
; sediment pollution
; spatial analysis
; vertical distribution
; watershed
; Article
; China
; climate
; concentration (parameters)
; force
; land use
; nonpoint source pollution
; precipitation
; priority journal
; redundancy analysis
; river
; sediment
; soil property
; spatial analysis
; tillage
; watershed management
; analysis
; environmental monitoring
; nonpoint source pollution
; procedures
; sediment
; water pollutant
; Abujiao Basin
; China
; Heilongjiang
; Naoli Basin
; China
; Environmental Monitoring
; Geologic Sediments
; Lead Radioisotopes
; Metals, Heavy
; Nitrogen
; Non-Point Source Pollution
; Phosphorus
; Rivers
; Water Pollutants, Chemical
英文摘要: The formation and transportation processes of non-point source (NPS) pollution varied among the studied watersheds in the Northeastern China, so we hypothesized that the driving force behind NPS pollution followed the spatial scale effect. With a watershed outlet sedimentary flux analysis and a distributed NPS pollution loading model, we investigated the temporal dynamics of NPS and the differences in driving forces. Sediment core samples were collected from two adjacent watersheds, the smaller Abujiao watershed and the larger Naoli watershed. The natural climatic conditions, long-term variations in the distribution of land use, soil properties and tillage practices were the same in the two watersheds. The vertical distributions of total nitrogen, total phosphorus, Zn and As at 1-cm intervals in the section showed clear differences between the watersheds. There were higher concentrations of total nitrogen and total phosphorus in the larger watershed, but the heavy metals were more concentrated in the smaller watershed. Lead-210 (210Pb) analyses and the constant rate of supply model provided a dated sedimentary flux, which was correlated with the corresponding yearly loading of NPS total nitrogen and total phosphorus in the two watersheds. The total phosphorus showed a stable relationship in both watersheds with an R2 value that ranged from 0.503 to 0.682. A rose figure comparison also demonstrated that the pollutant flux in the sediment was very different in the two watersheds, which had similar territorial conditions and different hydrological patterns. Redundancy analysis further indicated that expanding paddy areas had a large impact on the sedimentary flux of nitrogen and phosphorus in the smaller watershed, but precipitation had a direct impact on NPS loading in the larger watershed. We concluded that the spatial scale effect affected the NPS pollution via the transport processes in the waterway, which was mainly influenced by branch length and drainage density. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112756
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China; Environmental Chemistry, Department of Chemistry, Umeå University, Umeå, SE-901 87, Sweden; College of Water Resource, Beijing Normal University, Beijing, 100875, China
Recommended Citation:
Ouyang W.,Yang W.,Tysklind M.,et al. Using river sediments to analyze the driving force difference for non-point source pollution dynamics between two scales of watersheds[J]. Water Research,2018-01-01,139