DOI: 10.5194/hess-19-981-2015
Scopus记录号: 2-s2.0-84923338381
论文题名: Nitrogen surface water retention in the Baltic Sea drainage basin
作者: Stålnacke P ; , Pengerud A ; , Vassiljev A ; , Smedberg E ; , Mörth C ; -M ; , Hägg H ; E ; , Humborg C ; , Andersen H ; E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 2 起始页码: 981
结束页码: 996
语种: 英语
Scopus关键词: Lakes
; Nitrogen
; Nutrients
; Rivers
; Surface waters
; Water pollution
; Water resources
; Watersheds
; Baltic sea action plans
; Cost-efficient
; Degree of precision
; Nutrient loading
; Nutrient loads
; Source apportionment
; Statistical modeling
; Water retention
; Catchments
; accuracy assessment
; cost-benefit analysis
; drainage basin
; estimation method
; nutrient enrichment
; river basin
; surface water
; water retention
; Atlantic Ocean
; Baltic Sea
英文摘要: In this paper, we estimate the surface water retention of nitrogen (N) in all the 117 drainage basins to the Baltic Sea with the use of a statistical model (MESAW) for source apportionment of riverine loads of pollutants. Our results show that the MESAW model was able to estimate the N load at the river mouth of 88 Baltic Sea rivers, for which we had observed data, with a sufficient degree of precision and accuracy. The estimated retention parameters were also statistically significant. Our results show that around 380 000 t of N are annually retained in surface waters draining to the Baltic Sea. The total annual riverine load from the 117 basins to the Baltic Sea was estimated at 570 000 t of N, giving a total surface water N retention of around 40%. In terms of absolute retention values, three major river basins account for 50% of the total retention in the 117 basins; i.e. around 104 000 t of N are retained in Neva, 55 000 t in Vistula and 32 000 t in Oder. The largest retention was found in river basins with a high percentage of lakes as indicated by a strong relationship between N retention (%) and share of lake area in the river drainage areas. For example in Göta älv, we estimated a total N retention of 72%, whereof 67% of the retention occurred in the lakes of that drainage area (Lake Vänern primarily). The obtained results will hopefully enable the Helsinki Commission (HELCOM) to refine the nutrient load targets in the Baltic Sea Action Plan (BSAP), as well as to better identify cost-efficient measures to reduce nutrient loadings to the Baltic Sea. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78597
Appears in Collections: 气候变化事实与影响
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作者单位: Bioforsk - Norwegian Institute for Agricultural and Environmental Research, Fr. A. Dahls vei 20, Ås, Norway; Tallinn University of Technology, Ehitajate tee 5, Tallinn, Estonia; Baltic Sea Centre, Stockholm University, Stockholm, Sweden; Aarhus University, Department of Bioscience, Vejlsøvej 25, Aarhus, Denmark
Recommended Citation:
Stålnacke P,, Pengerud A,, Vassiljev A,et al. Nitrogen surface water retention in the Baltic Sea drainage basin[J]. Hydrology and Earth System Sciences,2015-01-01,19(2)