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SWAT parameterization for the identification of critical diffuse pollution source areas under data limitations

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National Technical University of Athens   

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SWAT parameterization for the identification of critical diffuse pollution source areas under data limitations (EN)
Makropoulos, C (EN)
Panagopoulos, Y (EN)
Baltas, E (EN)
Mimikou, M (EN)
journalArticle (EN)
2014-03-01T01:37:11Z
2011 (EN)
For lowering sediment, nitrogen (N) and phosphorus (P) pollution of surface water bodies at the catchment scale, environmental legislation require programs of pollution abatement measures. To be able to ensure the cost-effectiveness of such programs we first need to identify high risk areas, which give rise to increased pollutant runoff. Process-based GIS models provide the opportunity to identify such critical areas and hence better target diffuse pollution abatement actions. However, these models are data intensive and their spatially-distributed parameterization in poorly monitored catchments is not feasible without extensive input data pre-processing and significant simplifying assumptions. This study implements the widely-used SWAT river basin model (Soil Water Assessment Tool) to study a medium-sized Greek catchment with the typical data limitations met at the national level, in order to identify critical diffuse pollution source areas that may serve as the key areas for meeting the objective of 'good ecological status' of water bodies set by the European Water Framework Directive (WFD). Model parameterization and evaluation are presented along with the decisions made to overcome problems related to data representation in the catchment, in an effort to provide guidance on SWAT modeling in areas with similar characteristics. The results show that sediments and nutrients could be adequately reproduced in large time steps (monthly or seasonal) and that even with the current data limitations, the seasonal variation and the most critical areas of pollutant losses to waters could be adequately identified. The study proposes a transparent modeling approach under data limitations without neglecting possible deficiencies; however, it maintains that the SWAT model, if appropriately parameterized with respect to the land-use and soil differentiation within a limited-gauged catchment, can still facilitate the selection and placement of suitable practices across the landscape for a cost-effective diffused pollution management. (C) 2011 Elsevier B.V. All rights reserved. (EN)
Ecology (EN)
Data limitations (EN)
Pollutant runoff (EN)
Catchment scale (EN)
Waterbodies (EN)
European Water Framework Directive (EN)
Anoxic sediments (EN)
Parameterization (EN)
ecological modeling (EN)
Greece (EN)
River pollution (EN)
Parameterized (EN)
Pollution (EN)
Cost effectiveness (EN)
Geologic models (EN)
Modeling approach (EN)
phosphorus (EN)
Data intensive (EN)
river basin (EN)
runoff (EN)
pollutant source (EN)
Input datas (EN)
SWAT (EN)
Diffuse pollution (EN)
GIS (EN)
seasonal variation (EN)
surface water (EN)
Pollution management (EN)
Runoff (EN)
Time step (EN)
Data representations (EN)
Pollutant loss (EN)
Sedimentology (EN)
National level (EN)
Data handling (EN)
Catchments (EN)
Current data (EN)
Water conservation (EN)
soil degradation (EN)
environmental legislation (EN)
Seasonal variation (EN)
cost-benefit analysis (EN)
Critical area (EN)
Nutrients (EN)
Pollution abatement (EN)
environmental tax (EN)
catchment (EN)
Model parameterization (EN)
Surface water body (EN)
Soil moisture (EN)
nitrogen (EN)
data processing (EN)
parameterization (EN)
Phosphorus (EN)
Environmental legislations (EN)
Sediments (EN)
River basins (EN)
Soil water assessment tool (EN)
Laws and legislation (EN)
pollution monitoring (EN)
High-risk areas (EN)
Simplifying assumptions (EN)
Critical areas (EN)
SWAT model (EN)
nutrient limitation (EN)
Ecological status (EN)
Ecological Modelling (EN)
English
ELSEVIER SCIENCE BV (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
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