Aquifer vulnerability mapping in the Turbio river valley, Mexico: a validation study
Aquifer vulnerability assessments can be made using quantitative methods such as DRASTIC and AVI. Their typical outputmaps are generally not validated or verified with field data. This paper proposes validation alternatives for aquifer vulnerabilitymapping. The DRASTIC mapping of the Turbio river va...
| Authors: | , |
|---|---|
| Format: | article |
| Status: | Published version |
| Publication Date: | 2003 |
| Country: | México |
| Institution: | Universidad Nacional Autónoma de México |
| Repository: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:56842112 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=56842112 |
| Access Level: | Open access |
| Keyword: | Ciencias de la Tierra AVI DRASTIC aquifer pollution Aquifer vulnerability |
| Summary: | Aquifer vulnerability assessments can be made using quantitative methods such as DRASTIC and AVI. Their typical outputmaps are generally not validated or verified with field data. This paper proposes validation alternatives for aquifer vulnerabilitymapping. The DRASTIC mapping of the Turbio river valley, in Guanajuato State, Mexico comprises an area of 1300 km2. Comparingit with another aquifer vulnerability map generated by the AVI method, it could be validated. DRASTIC parameter comparisonwas also applied. A rescaling of the original DRASTIC rating range is proposed and justified based on the analysis of its effectiveweight. The vulnerability tendencies obtained were correlated with observed hydrogeochemical information. The observed valuesfor chloride and TDS agree with the vulnerable areas defined by DRASTIC and AVI. Those areas correspond to the riverbed of theLeón-Turbio fluvial system. Some potential pollution sources are located in the vulnerable zones. The results demonstrate theimportance of validation alternatives. They also show how in the most vulnerable areas, solutes coming from pollution sources areaffecting the groundwater quality. |
|---|