Publication Date:
2019
Description:
〈h3〉Abstract〈/h3〉
〈p〉In the present study DRASTIC model was used to assess the groundwater vulnerable zone for Raipur city. In this study DRASTIC model is modified into four ways i.e. DRASTIC, Modified DRASTIC-Lu, DRASTIC AHP and Modified DRASTIC-Lu AHP. To modify the DRASTIC model, LULC parameter was added in the real DRASTIC model and also AHP technique applied to determine the rating and weight. In this study, it is observed that 2.83%, 7.57%, 32.03%, 47.78% and 9.8% areas are respectively falling under very low, low, moderate, high and very high vulnerable DRASTIC index, 2.56%, 10.96%, 30.10%, 47.47% and 8.9% areas are respectively falling under very low, low, moderate, high and very high vulnerable modified DRASTIC-Lu index, 3.27%, 16.63%, 47.14%, 74.44% and 9.96% area are respectively falling under very low, low, moderate, high and very high vulnerable DRASTIC-AHP index classes and 2.74%, 12.27%, 38.16%, 41.5% and 5.3% area are respectively falling under very low, low, moderate, high and very high vulnerable modified DRASTIC-Lu AHP index. To determine the accuracy of the DRASTIC models, total 50 groundwater samples of nitrate concentration were used for pre-monsoon and post-monsoon seasons and it was observed that Modified DRASTIC-Lu AHP model is most accurate and suitable for present study area.〈/p〉
Print ISSN:
0016-7622
Electronic ISSN:
0974-6889
Topics:
Geosciences
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