Coupling indicators and lumped-parameter modeling to assess suspended matter and soluble phosphorus losses

Autor: Dominique Trevisan, Philippe Quetin, Charline Giguet-Covex, Fabien Arnaud, Pierre Sabatier
Přispěvatelé: Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), INRA 29000732, Communaute Urbaine Creusot Montceau les Mines 29000732
Rok vydání: 2019
Předmět:
Environmental Engineering
River ecosystem
010504 meteorology & atmospheric sciences
Water table
[SDE.MCG]Environmental Sciences/Global Changes
Drainage basin
010501 environmental sciences
01 natural sciences
Environmental Chemistry
catchment
Waste Management and Disposal
Bank erosion
0105 earth and related environmental sciences
geography
geography.geographical_feature_category
[SDE.IE]Environmental Sciences/Environmental Engineering
phosphorus losses
Environmental engineering
[SHS.GEO]Humanities and Social Sciences/Geography
15. Life on land
Particulates
Sedimentation
erosion
[SDE.ES]Environmental Sciences/Environmental and Society
Pollution
Natural resource
6. Clean water
sediment core
lumped-parameter modeling
13. Climate action
Erosion
transfer function
Environmental science
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Zdroj: Science of the Total Environment
Science of the Total Environment, Elsevier, 2019, 650 (Part 2), pp.3027-3040. ⟨10.1016/j.scitotenv.2018.09.392⟩
ISSN: 0048-9697
1879-1026
DOI: 10.1016/j.scitotenv.2018.09.392
Popis: International audience; For ecological and economic issues, evaluating the environmental fate of dissolved and suspended matter in catchments and river ecosystems still remains a challenge for the preservation and management of natural resources. Models are useful tools and may help to cope with this challenge, and especially to define the relationships between the state of natural systems and land and river management/uses. As it is difficult -even impossible- to carry out experiments on natural systems such as catchments, models are also useful to test hypotheses about the underlying processes acting on dissolved and suspended losses. We propose a innovative approach to achieve these objectives. By coupling environmental indicators and lumped modeling, this study aims to develop a conceptual and general framework to evaluate and test the functions that drive particulate and dissolved matter flows at the catchment and landscape scales, while respecting the constraint of parsimony for the number of model parameters. Calculated suspended matter (SM) and soluble reactive phosphorus (SRP) losses agreed well with field data. 210Pbex (excess Pb) activities in core sediments were also compared to those of 210Pbex calculated from the filling of the reservoir. Our models are parsimonious and this does not impair their accuracy in reproducing recorded outflows or evaluating the sedimentation processes associated to particulate outflows. Considering the adequacy of our models, we validate the hypothesis that river bank erosion and water table behavior are the driving processes that govern losses of particulate and solute forms of P, in the studied extensive agriculture conditions.
Databáze: OpenAIRE
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