Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay
Groundwater vulnerability mapping was conducted for two intensive agriculture and urban watersheds draining to the Yacyreta Dam in Paraguay. Two widely used overlaying methods (GOD and DRASTIC) were applied and compared to determine groundwater vulnerability to contamination. Possible effects o...
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RepoCATIE83142021-12-22T19:22:59Z Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay Musálem Castillejos, Karim McDonald, Morag Jiménez Otárola, Francisco Laino Guanes, Rafaela María PARAGUAY Groundwater vulnerability mapping was conducted for two intensive agriculture and urban watersheds draining to the Yacyreta Dam in Paraguay. Two widely used overlaying methods (GOD and DRASTIC) were applied and compared to determine groundwater vulnerability to contamination. Possible effects of climate change on vulnerability values were also assessed using climate change scenarios provided by third authors. Finally, the possible effects of water table variations derived from Yacyreta Dam operations was projected on groundwater vulnerability. Determination of groundwater vulnerability using DRASTIC shows a 56% of the area of the watersheds to be classified as “medium high” (DRASTIC index 140 – 159) and a 22% as either “high”, “very high” or “maximum” (DRASTIC index values 160 – > 200). GOD on the other hand showed a 96% of the area of the watersheds with a “moderate vulnerability” to contaminants (values 0.3-0.5) and a 4% of “high vulnerability” (values 0.51 – 0.6). Vulnerability classes remained the same regardless of any climate change scenarios reviewed, for a 100 year span. Operation by the dam, specifically a five meter elevation of the water table scenario, suggests an increase in vulnerability in lower parts of the watersheds. Finally we compare GOD and DRASTIC models and their suitability regarding the available data for the region and scenario building. 2016-06-02T15:50:05Z 2016-06-02T15:50:05Z 2015 Artículo https://repositorio.catie.ac.cr/handle/11554/8314 en Tecnología y Ciencias del Agua. Volumen 6, número 6 (noviembre - diciembre 2015), páginas 49-61 application/pdf |
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Centro Agronómico Tropical de Investigación y Enseñanza |
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Repositorio CATIE |
| language |
Inglés |
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PARAGUAY |
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PARAGUAY Musálem Castillejos, Karim McDonald, Morag Jiménez Otárola, Francisco Laino Guanes, Rafaela María Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay |
| description |
Groundwater vulnerability mapping was conducted for two
intensive agriculture and urban watersheds draining to the
Yacyreta Dam in Paraguay. Two widely used overlaying
methods (GOD and DRASTIC) were applied and compared
to determine groundwater vulnerability to contamination.
Possible effects of climate change on vulnerability values
were also assessed using climate change scenarios provided
by third authors. Finally, the possible effects of water table
variations derived from Yacyreta Dam operations was
projected on groundwater vulnerability. Determination of
groundwater vulnerability using DRASTIC shows a 56%
of the area of the watersheds to be classified as “medium
high” (DRASTIC index 140 – 159) and a 22% as either “high”,
“very high” or “maximum” (DRASTIC index values 160 – >
200). GOD on the other hand showed a 96% of the area of the
watersheds with a “moderate vulnerability” to contaminants
(values 0.3-0.5) and a 4% of “high vulnerability” (values 0.51
– 0.6). Vulnerability classes remained the same regardless of
any climate change scenarios reviewed, for a 100 year span.
Operation by the dam, specifically a five meter elevation of
the water table scenario, suggests an increase in vulnerability
in lower parts of the watersheds. Finally we compare GOD
and DRASTIC models and their suitability regarding the
available data for the region and scenario building. |
| format |
Artículo |
| author |
Musálem Castillejos, Karim McDonald, Morag Jiménez Otárola, Francisco Laino Guanes, Rafaela María |
| author_facet |
Musálem Castillejos, Karim McDonald, Morag Jiménez Otárola, Francisco Laino Guanes, Rafaela María |
| author_sort |
Musálem Castillejos, Karim |
| title |
Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay |
| title_short |
Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay |
| title_full |
Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay |
| title_fullStr |
Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay |
| title_full_unstemmed |
Groundwater vulnerability mapping in two watersheds affected by Yacyreta Dam in Paraguay |
| title_sort |
groundwater vulnerability mapping in two watersheds affected by yacyreta dam in paraguay |
| publishDate |
2016 |
| url |
https://repositorio.catie.ac.cr/handle/11554/8314 |
| work_keys_str_mv |
AT musalemcastillejoskarim groundwatervulnerabilitymappingintwowatershedsaffectedbyyacyretadaminparaguay AT mcdonaldmorag groundwatervulnerabilitymappingintwowatershedsaffectedbyyacyretadaminparaguay AT jimenezotarolafrancisco groundwatervulnerabilitymappingintwowatershedsaffectedbyyacyretadaminparaguay AT lainoguanesrafaelamaria groundwatervulnerabilitymappingintwowatershedsaffectedbyyacyretadaminparaguay |
| _version_ |
1808117375360303104 |