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Quantification of advective solute travel times and mass transport through hydrological catchments
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).ORCID-id: 0000-0001-9408-4425
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).
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2010 (Engelska)Ingår i: Environmental Fluid Mechanics, ISSN 1567-7419, E-ISSN 1573-1510, Vol. 10, nr 1-2, s. 103-120Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study has investigated and outlined the possible quantification and mapping of the distributions of advective solute travel times through hydrological catchments. These distributions are essential for understanding how local water flow and solute transport and attenuation processes affect the catchment-scale transport of solute, for instance with regard to biogeochemical cycling, contamination persistence and water quality. The spatial and statistical distributions of advective travel times have been quantified based on reported hydrological flow and mass-transport modeling results for two coastal Swedish catchments. The results show that the combined travel time distributions for the groundwater-stream network continuum in these catchments depend largely on the groundwater system and model representation, in particular regarding the spatial variability of groundwater hydraulic parameters (conductivity, porosity and gradient), and the possible contributions of slower/deeper groundwater flow components. Model assumptions about the spatial variability of groundwater hydraulic properties can thus greatly affect model results of catchment-scale solute spreading. The importance of advective travel time variability for the total mass delivery of naturally attenuated solute (tracer, nutrient, pollutant) from a catchment to its downstream water recipient depends on the product of catchment-average physical travel time and attenuation rate.

Ort, förlag, år, upplaga, sidor
2010. Vol. 10, nr 1-2, s. 103-120
Nyckelord [en]
Hydrology, Travel time, Solute transport, Natural attenuation, Catchment, Groundwater surface water interactions
Nationell ämneskategori
Oceanografi, hydrologi och vattenresurser
Forskningsämne
naturgeografi
Identifikatorer
URN: urn:nbn:se:su:diva-31257DOI: 10.1007/s10652-009-9147-2ISI: 000274197800007OAI: oai:DiVA.org:su-31257DiVA, id: diva2:275899
Tillgänglig från: 2009-11-09 Skapad: 2009-11-09 Senast uppdaterad: 2022-02-25Bibliografiskt granskad
Ingår i avhandling
1. Quantifying pollutant spreading and the risk of water pollution in hydrological catchments: A solute travel time-based scenario approach
Öppna denna publikation i ny flik eller fönster >>Quantifying pollutant spreading and the risk of water pollution in hydrological catchments: A solute travel time-based scenario approach
2011 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The research presented in the thesis develops an approach for the estimation and mapping of pollutant spreading in catchments and the associated uncertainty and risk of pollution. The first step in the approach is the quantification and mapping of statistical and geographical distributions of advective solute travel times from pollutant input locations to downstream recipients. In the second step the travel time distributions are used to quantify and map the spreading of specific pollutants and the related risk of water pollution. In both steps, random variability of transport properties and processes is accounted for within a probabilistic framework, while different scenarios are used to account for statistically unquantifiable uncertainty about system characteristics, processes and future developments. This scenario approach enables a transparent analysis of uncertainty effects that is relatively easy to interpret. It also helps identify conservative assumptions and pollutant situations for which further investigations are most needed in order to reduce the uncertainty. The results for different investigated scenarios can further be used to assess the total risk to exceed given water quality standards downstream of pollutant sources.

Specific thesis results show that underestimation of pollutant transport variability, and in particular of those transport pathways with much shorter than average travel times, may lead to substantial underestimation of pollutant spreading in catchment areas. By contrast, variations in pollutant attenuation rate generally lead to lower estimated spreading than do constant attenuation conditions. A scenario of constant attenuation rate and high travel time variability, with a large fraction of relatively short travel times, therefore appears to be a reasonable conservative scenario to use when information is lacking for more precise determination of actual transport and attenuation conditions.

Ort, förlag, år, upplaga, sidor
Stockholm: Department of Physical Geography and Quaternary Geology, Stockholm University, 2011. s. 35
Serie
Dissertations from the Department of Physical Geography and Quaternary Geology, ISSN 1653-7211 ; 28
Nyckelord
water pollution, catchment, pollution risk, scenario analysis, uncertainty
Nationell ämneskategori
Oceanografi, hydrologi och vattenresurser
Forskningsämne
naturgeografi
Identifikatorer
urn:nbn:se:su:diva-63465 (URN)978-91-7447-207-3 (ISBN)
Disputation
2011-11-21, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 13:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2011-10-30 Skapad: 2011-10-19 Senast uppdaterad: 2022-02-24Bibliografiskt granskad

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Darracq, AmelieDestouni, GeorgiaPersson, KlasPrieto, CarmenJarsjö, Jerker

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Darracq, AmelieDestouni, GeorgiaPersson, KlasPrieto, CarmenJarsjö, Jerker
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