Integrated approach to delineate sites for implementation of managed aquifer recharge (MAR) structures in fluoridated crystalline aquifer of south India
MOHD ARSHAD SARAH SARAH ANKITA CHATTERJEE AJAYKUMAR VENKATARAO SHAKEEL AHMED
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Managed aquifer recharge (MAR) emerged as a potential technique to solve groundwater problems in stressed aquifer systems but the site selection for implementation of MAR structures in crystalline and contaminated aquifers is a challenging task. The current study intends a methodology to demarcate the suitable sites for MAR in fluoride-contaminated crystalline aquifer using integrated approach of remote sensing, geographic information system (GIS) and analytical hierarchy process associated with groundwater quality data. Seven thematic layers were considered in this study, viz., geology, geomorphology, slope, soil, drainage density, lineament density and land use-land cover. These thematic layers were then integrated in the GIS environment to identify the aquifer recharge potential zones according to their suitability for groundwater recharge in the area and it was found to be covenant with the mean groundwater fluctuation over the area. After superimposing of drainage and lineament on obtained aquifer recharge zone map, 41 possible sites for artificial recharge were delineated. Among 41 sites, only 13 were considered as MAR sites based on groundwater Cuoride level fluctuation with recharge in the area. The proposed methodology could be applicable to other fluoride-contaminated aquifers also.
$\bullet$ Managed aquifer recharge (MAR) sites in the fluoride-contaminated aquifer were delineated.
$\bullet$ A total of 41 artificial recharge sites were delineated, among them only 13 sites were considered as suitable for implementation of MAR structures.
$\bullet$ Showed the importance of chemical behaviour of groundwater during the recharge.
$\bullet$ Behaviour of fluoride with water level fluctuation was used as a key factor.
MOHD ARSHAD1 SARAH SARAH2 ANKITA CHATTERJEE3 AJAYKUMAR VENKATARAO3 SHAKEEL AHMED1 4
Volume 132, 2023
Continuous Article Publishing mode
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