Publications des scientifiques de l'IRD

Durango-Cordero J., Saqalli M., Ferrant Sylvain, Bonilla S., Maurice Laurence, Arellano P., Elger A. (2022). Risk assessment of unlined oil pits leaking into groundwater in the Ecuadorian Amazon : a modified GIS-DRASTIC approach. Applied Geography, 139, 102628 [15 p.]. ISSN 0143-6228.

Titre du document
Risk assessment of unlined oil pits leaking into groundwater in the Ecuadorian Amazon : a modified GIS-DRASTIC approach
Année de publication
2022
Type de document
Article référencé dans le Web of Science WOS:000795690900001
Auteurs
Durango-Cordero J., Saqalli M., Ferrant Sylvain, Bonilla S., Maurice Laurence, Arellano P., Elger A.
Source
Applied Geography, 2022, 139, 102628 [15 p.] ISSN 0143-6228
This study evaluates the risk of groundwater contamination from unlined oil pits, in the Northern Ecuadorian Amazon (NEA). Applying spatial analysis, several maps were provided for its integration in land use planning, public health improvement and future site-specific investigations. Two main maps were produced: (1) a vulnerability indexed map using a modified DRASTIC model and (2) a hazard map based on the past (1995-1997) and present (2018) contamination using a weighted density equation. The hazard was derived from hydrocarbon contained in oil pits associated with a cost-distance analysis to obtain different maximum distance ranges (MDR), to model the surface of potentially impacted groundwater. The results indicate a total calculated hydrocarbons of 39 052 tons. A MDR from 500-10 000 km was retained to map aquifers at risk, the maximum surface potentially at risk covers 13% of the NEA, while 83% of the area represents low to medium-low vulnerability. This study led to several recommendations, such as the level of suitability of the available information, and what gaps should be filled to improve future research. A surface of 271-766.5 km in the 500-2000-m distance range should be prioritised for finer scale risk assessment.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Sciences du milieu [021] ; Pollution [038] ; Economie : secteurs d'activité [096]
Description Géographique
EQUATEUR ; AMAZONIE
Localisation
Fonds IRD [F B010085111]
Identifiant IRD
fdi:010085111
Contact