Evaluation of Aquifer Vulnerability Using Drastic Model and GIS: A Case Study of Mysore City, Karnataka, India

Lathamani, R.; Janardhana, M. R.; Mahalingam, B.; Suresha, S.

doi:10.1016/j.aqpro.2015.02.130

Cited by 40 publications

(21 citation statements)

References 5 publications

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“…3). The relationship can be: ... (10) and (11) are valid when the relationship between φ and ξ is linear, that is when 0.2 ≤ ξ ≤ 0.8 (Fig. 3).…”

Section: Phase Of the Vertical Magnetic Dipolementioning

confidence: 99%

“…Due to this, dependence on groundwater is higher day after day because of the enormous population growth in coastal areas, [10] as they demand fresh water free of contaminants [11], knowing seasonal and special evolution of water in coast zones is useful for preventing seawater intrusion and to understand the vulnerability of a coastal environment [12]. As groundwater use has increased in coastal areas, so has the recognition that groundwater supplies are vulnerable to overuse and contamination.…”

Section: Introductionmentioning

confidence: 99%

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Determining Water Salinity in a Shallow Aquifer and Its Vulnerability to Coastline Erosion

Peinado-Guevara¹,

Delgado‐Rodríguez²,

Herrera-Barrientos³

et al. 2017

Pol. J. Environ. Stud.

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In most coastal areas in Mexico, there is an increase in housing development and facilities for tourism, consequently resulting in a negative impact on the environment. Due to this, an awareness of the critical role of groundwater in sustaining coastal populations, economies, and ecosystems is growing. The coastal zone of Sinaloa State is classified as an area with a high presence of saline groundwater in Mexico. The present work was performed in the Las Glorias Beach, Guasave, Sinaloa, Mexico. The results of the analysis of 19 soil and groundwater samples indicate the predominance of sandy soil and a wide range of water salinity, from slightly saline to brine. An electromagnetic profiling (EMP) survey was performed at the study site showing a low apparent electrical conductivity zone parallel to the coastline as indicative of the possible presence of fresh and/or slightly saline water. Apparent electrical conductivity values were compared with electrical conductivity values measured in groundwater samples collected in wells, resulting in a positive linear correlation (R = 0.97). This linear relation is explained by a φ -ξ electromagnetic analytic model when 5.36 ≤ σ a ≤ 85.87 mS/cm. The linear relation was used to recalculate the apparent electrical conductivity values from EMP survey into electrical conductivity values of groundwater and, therefore, TDS values. The TDS map indicates the presence of a barrier of fresh/slightly saline groundwater parallel to the coastline that keeps a fragile balance that prevents the advance of saltwater intrusion from the sea of Cortés and from brine zones located in the northern part of the site. The advance of erosion in Las Glorias Beach exposes

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“…3). The relationship can be: ... (10) and (11) are valid when the relationship between φ and ξ is linear, that is when 0.2 ≤ ξ ≤ 0.8 (Fig. 3).…”

Section: Phase Of the Vertical Magnetic Dipolementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determining Water Salinity in a Shallow Aquifer and Its Vulnerability to Coastline Erosion

Peinado-Guevara¹,

Delgado‐Rodríguez²,

Herrera-Barrientos³

et al. 2017

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

show abstract

“…The most widely used method for vulnerability evaluation is DRASTIC because of its ease of use, minimal data requirements, and clear exposition of groundwater vulnerability [14]. The method has been widely used for regional vulnerability assessments in many countries such as the USA [15][16], China [17][18], Korea [19], Canada [20], India [21], Turkey [22], Tunisia [23], South Africa [24][25], and the Ivory Coast [26]. DRASTIC, as with other similar index methods, has many disadvantages: 1) so many variables are factored into the fi nal index that critical parameters in groundwater vulnerability may be masked by other parameters that have no bearing on vulnerability for a particular setting [27], 2) the results overestimate the vulnerability of porous media aquifers compared with aquifers in fractured media [28], and 3) the selection of the parameters is based on qualitative judgment and not quantitative studies [29][30].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the DRASTIC Method for Nitrate Pollution in Groundwater Vulnerability Assessments: a Case Study in China

He¹,

Li²,

Li³

et al. 2018

Pol. J. Environ. Stud.

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Groundwater vulnerability assessments, using DRASTIC, are important and useful tools for groundwater pollution prevention and control. The DRASTIC method, however, is not appropriate for accurate specifi c vulnerability assessments where nitrate concentrations are high. A new method has been developed that retains the basic structure of DRASTIC while adding or subtracting parameters, and modifying the parameter ratings and weightings. The resulting DRACILM model was used to assess vulnerability to nitrate pollution in the West Liaohe Plain and as a basis for vulnerability mapping. The accuracy, appropriateness, and reliability of the vulnerability mapping were analyzed using a group of integrated indicators, such as correlation, ANOVA F-statistics, and single-parameter sensitivity analysis. The correlation between vulnerability class and the concentration of NO 3 -N in the DRACILM model improved to 0.649, which was 40.6% higher than that obtained by DRASTIC. The ANOVA F-statistic was 27.71, which indicated a lower overlap between the mean values of nitrates in the different vulnerability classes. The single-parameter sensitivity analysis revealed that land use type exhibited the highest and hydraulic conductivity the lowest effective weighting values. The vulnerability maps by DRACILM model could assist planners and government decision-makers with preliminary investigations into planning water protection projects or establishing management scenarios for water resource quality.

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“…Similarly many approaches have been used to determine the aquifer protective capacity or aquifer vulnerability of an area. Overlay and index methods that combine specific physical characteristics that affect vulnerability, process-based methods consisting of mathematical models that approximate the behavior of substances in the subsurface environment (Adeyemo et al, 2015;Lathamani et al, 2015 andJavadi, et.al., 2017) and statistical methods that draw associations with areas where contamination is known to have occurred (Chen et. al., 2013 andArmengol, et.…”

Section: Introductionmentioning

confidence: 99%

Geoelectric investigation of the suitability of a proposed foldot ventures potable water factory site, Ipinsa, near Akure, southwestern Nigeria

Adeyemo¹

2018

Nig J Bas App Sci

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This study is aim at determining the suitability of sitting a potable water factory within Chief Akin Omosebi layout off Ipinsa-Ilara road, near Akure, Ondo State, Nigeria by evaluating the groundwater potential, the aquifer overlying layer protective capacity and the foundation beds competence of the area. A total of twenty (20) vertical electrical soundings (VES) data were acquired along five (5) traverses using Schlumberger array with maximum half-current electrode separation of 150 m. Three curve types were delineated in the area (K, KH and KQ). The VES results delineated three to four geoelectric layers across the study area. The resistivity of the top soil, lateritic weathered layer, clayey sand weathered layer and weathered bedrock/fresh bedrock varies from 187-1212, 682-4164, 219-1157 and 77-3525 ohm-m respectively. This study reveals that the area is characterized by high groundwater potential and competent subsurface layers that can serve as foundation bed, but the aquifer layer must be well protected from pollution since the overlying layer(s) longitudinal conductance is less than 1.0 mhos which indicates that the underlying aquifer unit(s) are vulnerable to surface pollution.

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Evaluation of Aquifer Vulnerability Using Drastic Model and GIS: A Case Study of Mysore City, Karnataka, India

Cited by 40 publications

References 5 publications

Determining Water Salinity in a Shallow Aquifer and Its Vulnerability to Coastline Erosion

Determining Water Salinity in a Shallow Aquifer and Its Vulnerability to Coastline Erosion

Optimizing the DRASTIC Method for Nitrate Pollution in Groundwater Vulnerability Assessments: a Case Study in China

Geoelectric investigation of the suitability of a proposed foldot ventures potable water factory site, Ipinsa, near Akure, southwestern Nigeria

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