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Nutrient source att...
Nutrient source attribution : Quantitative typology distinction of active and legacy source contributions to waterborne loads
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- Chen, Yuanying (author)
- Stockholms universitet,KTH,Hållbar utveckling, miljövetenskap och teknik,Stockholm Univ, Dept Phys Geog, Stockholm, Sweden.,Institutionen för naturgeografi,KTH Royal Institute of Technology, Sweden
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- Destouni, Georgia (author)
- Stockholms universitet,Institutionen för naturgeografi,Stockholm Univ, Dept Phys Geog, Stockholm, Sweden.
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- Goldenberg, Romain (author)
- Stockholms universitet,Institutionen för naturgeografi,Stockholm Univ, Dept Phys Geog, Stockholm, Sweden.
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- Prieto, Carmen (author)
- Stockholms universitet,Institutionen för naturgeografi,Stockholm Univ, Dept Phys Geog, Stockholm, Sweden.
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(creator_code:org_t)
- 2021-07-21
- 2021
- English.
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In: Hydrological Processes. - : Wiley. - 0885-6087 .- 1099-1085. ; 35:7
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Abstract
Subject headings
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- Distinction between active and legacy sources of nutrients is needed for effective reduction of waterborne nutrient loads and associated eutrophication. This study quantifies main typological differences in nutrient load behaviour versus water discharge for active and legacy sources. This quantitative typology is used for source attribution based on monitoring data for water discharge and concentrations of total nitrogen (TN) and total phosphorous (TP) from 37 catchments draining into the Baltic Sea along the coastline of Sweden over the period 2003-2013. Results indicate dominant legacy source contributions to the monitored loads of TN and TP in most (33 of the total 37) study catchments. Dominant active sources are indicated in 1 catchment for TN, and mixed sources are indicated in 3 catchments for TN, and 4 catchments for TP. The TN and TP concentration contributions are quantified to be overall higher from the legacy than the active sources. Legacy concentrations also correlate well with key indicators of human activity in the catchments, agricultural land share for TN (R-2 = 0.65) and population density for TP (R-2 = 0.56). Legacy-dominated nutrient concentrations also change more slowly than in catchments with dominant active or mixed sources. Various data-based results and indications converge in indicating legacy source contributions as largely dominant, mainly anthropogenic, and with near-zero average change trends in the present study of catchments draining into the Baltic Sea along the coastline of Sweden, as in other parts of the world. These convergent indications emphasize needs to identify and map the different types of sources in each catchment, and differentiate strategies and measures to target each source type for possible achievement of shorter- and longer-term goals of water quality improvement.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- LANTBRUKSVETENSKAPER -- Annan lantbruksvetenskap -- Miljö- och naturvårdsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Other Agricultural Sciences -- Environmental Sciences related to Agriculture and Land-use (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- Baltic
- legacy sources
- multi-catchment analysis
- nutrients
- source type attribution
- water quality
Publication and Content Type
- ref (subject category)
- art (subject category)
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