A simple multi-criteria approach to delimitate nitrate attenuation zones in alluvial floodplains. Four cases in south-western Europe
| Autor: | Enrique Navarro, Fabián Carranza, David Brito, Julian Ladera, Léonard Bernard-Jannin, Iñaki Antigüedad, Sabine Sauvage, Xiaoling Sun, Jesus A. Uriarte, Tomás Morales, Samuel Teissier, José María Bodoque, José-Miguel Sánchez-Pérez, Cecilia Español, Ane Zabaleta, Estilita Ruiz, Francisco A. Comín, Ramiro Neves, Miren Martínez-Santos |
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| Rok vydání: | 2017 |
| Předmět: |
Pollution
Hydrology geography Environmental Engineering geography.geographical_feature_category Land use Floodplain Water table media_common.quotation_subject 0208 environmental biotechnology Flooding (psychology) 02 engineering and technology Management Monitoring Policy and Law 020801 environmental engineering chemistry.chemical_compound Nitrate chemistry Environmental science Alluvium Nature and Landscape Conservation Riparian zone media_common |
| Zdroj: | Ecological Engineering. 103:315-331 |
| ISSN: | 0925-8574 |
| DOI: | 10.1016/j.ecoleng.2016.09.007 |
| Popis: | Four alluvial floodplains were selected in the European southwestern lowland area: the rivers Ebro, Bidasoa, Tagus (Spain) and the Garonne (France) were chosen. They have some common characteristics (alluvial aquifers, connectivity with the river, nitrate pollution) but differ in other important aspects (water table fluctuations, flooding dynamics, landscape control, land use, agricultural practices, climate). A comparative study considering nitrogen and carbon sources and the way they interact in the riparian zone was conducted in order to test a simple approach to delimitate permanent nitrate attenuation zones and to evidence the importance of site-specific attributes. The observation was based on a detailed monthly monitoring during a year ensuring data at high and low water periods. The tested approach results in a useful tool to spatially delimitate the attenuation zones. However, this approach is difficult to apply in areas where pollution sources are very diverse in type and in both time and space. This leads us to conclude that a general conceptual model cannot capture all the factors needed to understand the nitrate removal dynamics of a riparian zone. Hence, the study combines observation-conceptualization framework with river-riparian-upland connectivity and source-pathway-target continuity. |
| Databáze: | OpenAIRE |
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