Offshore freshwater aquifer systems exist in many parts of the globe as seaward extension of coastal aquifers. The coastal aquifer systems are often very heterogeneous, combining numerous high permeability aquifers interlaid with low permeability aquitards with varying total thickness.This heterogeneity plays a major role in the fresh groundwater storage, movement, and groundwater salinity distribution within such systems. The Kuttanad is a low lying coastal tract in the western coast of Kerala underlain mainly by the Recent alluvium and thick Tertiary sediments unconformably resting over the Archaeancrystallines.The isopach maps of stratigraphic formations indicate offshore extension of the aquifer systems. The hydraulic gradient and its response to groundwater draft over the decade in these confined aquifers indicate offshore freshwaterseawater interface.The marine transgressions and regressions in the Pleistocene period influenced the evolutionary history of groundwater in the aquifer systems in this sedimentary formation. Offshore groundwater resources could act as an important additional freshwater resource in times of rising water stress.
Plausible Offshore Freshwater Aquifer System off the Kerala Coast: A Case Study from the Kuttanad Area of Kerala
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Offshore freshwater aquifer systems exist in many parts of the globe as seaward extension of coastal aquifers. The coastal aquifer systems are often very heterogeneous, combining numerous high permeability aquifers interlaid with low permeability aquitards with varying total thickness.This heterogeneity plays a major role in the fresh groundwater storage, movement, and groundwater salinity distribution within such systems. The Kuttanad is a low lying coastal tract in the western coast of Kerala underlain mainly by the Recent alluvium and thick Tertiary sediments unconformably resting over the Archaeancrystallines.The isopach maps of stratigraphic formations indicate offshore extension of the aquifer systems. The hydraulic gradient and its response to groundwater draft over the decade in these confined aquifers indicate offshore freshwaterseawater interface.The marine transgressions and regressions in the Pleistocene period influenced the evolutionary history of groundwater in the aquifer systems in this sedimentary formation. Offshore groundwater resources could act as an important additional freshwater resource in times of rising water stress.
Publication Mode |
Online |
---|---|
Publication Author |
V. Kunhambu, N. Vinayachandran, D. S. Sureshbabu |
Publication Language |
English |
Publication Type |
Conference Paper |
Publication Year |
2021 |
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