DOI: 10.1016/j.watres.2018.01.011
Scopus记录号: 2-s2.0-85041531643
论文题名: Towards the development of a modeling framework to track nitrogen export from lowland artificial watersheds (polders)
作者: Huang J. ; Arhonditsis G.B. ; Gao J. ; Kim D.-K. ; Dong F.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 133 起始页码: 319
结束页码: 337
语种: 英语
英文关键词: Best management practices
; Nitrogen dynamics
; Paddy land
; Polders
; Water budget
Scopus关键词: Aquatic ecosystems
; Budget control
; Dynamic models
; Eutrophication
; Groundwater
; Nitrogen
; River pollution
; Soil moisture
; Water levels
; Watersheds
; Best management practices
; Ecosystem degradation
; Empirical estimate
; Nitrogen concentrations
; Nitrogen dynamics
; Polders
; Transport pathways
; Water budget
; Surface waters
; ground water
; nitrogen
; soil water
; surface water
; fresh water
; nitrogen
; best management practice
; concentration (composition)
; drainage network
; eutrophication
; lowland environment
; nitrogen
; numerical model
; nutrient dynamics
; paddy field
; pollutant transport
; water budget
; water level
; watershed
; Article
; China
; ecosystem
; fluid balance
; land use
; lowland artificial watershed
; nitrogen balance
; nitrogen concentration
; priority journal
; reaction analysis
; sensitivity analysis
; water cycle
; watershed
; analysis
; environmental monitoring
; eutrophication
; soil
; soil pollutant
; theoretical model
; water flow
; water pollutant
; water supply
; China
; Jian
; Jiangxi
; China
; Environmental Monitoring
; Eutrophication
; Fresh Water
; Groundwater
; Models, Theoretical
; Nitrogen
; Soil
; Soil Pollutants
; Water Movements
; Water Pollutants, Chemical
; Water Supply
英文摘要: Excess nitrogen (N) export from lowland artificial watersheds (polders) is often assumed to be a major contributor to the cultural eutrophication of downstream aquatic ecosystems. However, the complex transport processes characterizing lowland areas pose significant challenges in accurately quantifying their actual role. In this study, we developed a dynamic model to track N sources and transport pathways in lowland polders. The model is able to accommodate all the unique characteristics of polder dynamics, including artificial drainage, and interactions among surface water, groundwater and soil water. Our model was calibrated and validated against water level data and nitrogen concentrations measured in a lowland polder (Polder Jian) in China during the 2014–2016 period. Model performance was satisfactory with an R2 value of 0.55 and an NS value of 0.53 for total N concentrations. The characterization of the various components of water budget and N cycle derived by the model was on par with local empirical estimates. N export from Polder Jian was approximately 57 kg ha−1 yr−1 and was distinctly higher than values reported from nearby non-polder areas. The largest fraction of N export stemmed from seepage. To our knowledge, this is the first dynamic model to quantify N export from a watershed with artificial drainage network and can be used to design remedial measures of ecosystem degradation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112931
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China; Ecological Modelling Laboratory, Department of Physical & Environmental Sciences, University of Toronto, Toronto, ON M1C 1A4, Canada
Recommended Citation:
Huang J.,Arhonditsis G.B.,Gao J.,et al. Towards the development of a modeling framework to track nitrogen export from lowland artificial watersheds (polders)[J]. Water Research,2018-01-01,133