Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina
Our understanding of how groundwater mediates evapotranspiration/streamflow partitioning is still fragmented and catchment studies under changing vegetation conditions can provide a useful frame for integration. We explored this partition in a flat sedimentary dry catchment in central Argentina in w...
| Autores principales: | , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2021
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/9253 https://onlinelibrary.wiley.com/doi/abs/10.1002/hyp.14188 https://doi.org/10.1002/hyp.14188 |
| _version_ | 1855484359966982144 |
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| author | Jobbagy Gampel, Esteban Gabriel Lorenzo, Santiago Buono, Nicolás Páez, Ricardo Diaz, Yésica Marchesini, Victoria Nosetto, Marcelo Daniel |
| author_browse | Buono, Nicolás Diaz, Yésica Jobbagy Gampel, Esteban Gabriel Lorenzo, Santiago Marchesini, Victoria Nosetto, Marcelo Daniel Páez, Ricardo |
| author_facet | Jobbagy Gampel, Esteban Gabriel Lorenzo, Santiago Buono, Nicolás Páez, Ricardo Diaz, Yésica Marchesini, Victoria Nosetto, Marcelo Daniel |
| author_sort | Jobbagy Gampel, Esteban Gabriel |
| collection | INTA Digital |
| description | Our understanding of how groundwater mediates evapotranspiration/streamflow partitioning is still fragmented and catchment studies under changing vegetation conditions can provide a useful frame for integration. We explored this partition in a flat sedimentary dry catchment in central Argentina in which the replacement of native vegetation with rainfed crops was accompanied by the abrupt formation of groundwater‐fed streams by subsurface erosion (i.e. sapping) episodes. Historical records indicated widespread water table rises (~0.3 m y‐1 on average). Groundwater level and stream baseflow fluctuated seasonally with minima in the warm rainy season, indicating that evaporative discharge rather than rainfall shapes saturated flows. Diurnal groundwater level fluctuations showed that plant uptake was widespread where water tables are shallow (<3 m) but restricted to deep‐rooted Prosopis forests where they are deep (7‐10 m). MODIS and LANDSAT NDVI revealed a long‐term greening for native vegetation, new wetlands included, but not for croplands, suggesting more limited evapotranspiration‐groundwater level regulation under agriculture. Close to the deepest (20 m) and most active incisions, groundwater level and greenness declined and stream baseflow showed no seasonal fluctuations, hinting decoupling from evapotranspiration. Intense ecological and geomorphological transformations in this catchment exposed the interplay of five mechanisms governing evapotranspiration/streamflow partition including (i) unsaturated uptake and both (ii) riparian and (iii) distributed uptake from the saturated zone by plants, as well as (iv) deepening incisions and (v) sediment deposits over riparian zones by streams. Acknowledging the complex interplay of these mechanism with groundwater is crucial to predict and manage future hydrological changes in the dry plains of South America. |
| format | Artículo |
| id | INTA9253 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA92532021-05-03T18:13:15Z Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina Jobbagy Gampel, Esteban Gabriel Lorenzo, Santiago Buono, Nicolás Páez, Ricardo Diaz, Yésica Marchesini, Victoria Nosetto, Marcelo Daniel Agua Aflorada Cursos de Agua Aguas Subterráneas Imágenes por Satélites Hidrología Water Yield Rivers Groundwater Satellite Imagery Hydrology Streams Ríos Los Morros, San Luis Our understanding of how groundwater mediates evapotranspiration/streamflow partitioning is still fragmented and catchment studies under changing vegetation conditions can provide a useful frame for integration. We explored this partition in a flat sedimentary dry catchment in central Argentina in which the replacement of native vegetation with rainfed crops was accompanied by the abrupt formation of groundwater‐fed streams by subsurface erosion (i.e. sapping) episodes. Historical records indicated widespread water table rises (~0.3 m y‐1 on average). Groundwater level and stream baseflow fluctuated seasonally with minima in the warm rainy season, indicating that evaporative discharge rather than rainfall shapes saturated flows. Diurnal groundwater level fluctuations showed that plant uptake was widespread where water tables are shallow (<3 m) but restricted to deep‐rooted Prosopis forests where they are deep (7‐10 m). MODIS and LANDSAT NDVI revealed a long‐term greening for native vegetation, new wetlands included, but not for croplands, suggesting more limited evapotranspiration‐groundwater level regulation under agriculture. Close to the deepest (20 m) and most active incisions, groundwater level and greenness declined and stream baseflow showed no seasonal fluctuations, hinting decoupling from evapotranspiration. Intense ecological and geomorphological transformations in this catchment exposed the interplay of five mechanisms governing evapotranspiration/streamflow partition including (i) unsaturated uptake and both (ii) riparian and (iii) distributed uptake from the saturated zone by plants, as well as (iv) deepening incisions and (v) sediment deposits over riparian zones by streams. Acknowledging the complex interplay of these mechanism with groundwater is crucial to predict and manage future hydrological changes in the dry plains of South America. EEA San Luis Fil: Jobbagy Gampel, Esteban Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Jobbagy Gampel, Esteban Gabriel. Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Lorenzo, Santiago. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Luis; Argentina Fil: Buono, Nicolás. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Hidráulica; Argentina Fil: Páez, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Páez, Ricardo. Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Diaz, Yésica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Diaz, Yésica. Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Marchesini, Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Marchesini, Victoria. Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Nosetto, Marcelo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Nosetto, Marcelo Daniel. Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis; Argentina Fil: Nosetto, Marcelo Daniel. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. Cátedra de Climatología Agrícola; Argentina 2021-05-03T18:09:30Z 2021-05-03T18:09:30Z 2021-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://hdl.handle.net/20.500.12123/9253 https://onlinelibrary.wiley.com/doi/abs/10.1002/hyp.14188 0885-6087 1099-1085 https://doi.org/10.1002/hyp.14188 eng info:eu-repo/semantics/embargoedAccess application/pdf Wiley Hydrological Processes (First published: 25 April 2021) |
| spellingShingle | Agua Aflorada Cursos de Agua Aguas Subterráneas Imágenes por Satélites Hidrología Water Yield Rivers Groundwater Satellite Imagery Hydrology Streams Ríos Los Morros, San Luis Jobbagy Gampel, Esteban Gabriel Lorenzo, Santiago Buono, Nicolás Páez, Ricardo Diaz, Yésica Marchesini, Victoria Nosetto, Marcelo Daniel Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina |
| title | Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina |
| title_full | Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina |
| title_fullStr | Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina |
| title_full_unstemmed | Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina |
| title_short | Plants vs. Streams: Their groundwater‐mediated competition at “El Morro”, a developing catchment in the dry plains of Argentina |
| title_sort | plants vs streams their groundwater mediated competition at el morro a developing catchment in the dry plains of argentina |
| topic | Agua Aflorada Cursos de Agua Aguas Subterráneas Imágenes por Satélites Hidrología Water Yield Rivers Groundwater Satellite Imagery Hydrology Streams Ríos Los Morros, San Luis |
| url | http://hdl.handle.net/20.500.12123/9253 https://onlinelibrary.wiley.com/doi/abs/10.1002/hyp.14188 https://doi.org/10.1002/hyp.14188 |
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