What is it about?
Usually, crystalline hard-rocks are less permeable rocks with sparse fracture-networks, which poses the challenges for aquifer imaging. We simulated these fractures using electrical signals to understand the subsurface connectivity within an experimental hydrogeological park with managed aquifer condition. A decadal-scale time-lapse resistivity variation also recognized the influence of such conditions along-with shallow water-levels throughout the year for park and neighbouring areas, despite having highly heterogeneous rocks. The three-dimensional model provided an overview of shallow and deep flow-paths establishing the aquifer system hydraulic connectivity.
Photo by Erik Mclean on Unsplash
Why is it important?
Our findings indicate that artificial recharge tank strengthens the recharge dynamics of the hard-rock aquifer system, which gives a substantial rise in the water-levels for the experimental park and the adjacent regions.
Read the Original
This page is a summary of: Electrically inferred subsurface fractures in the crystalline hard rocks of an Experimental Hydrogeological Park, Southern India, Geophysics, June 2021, Society of Exploration Geophysicists, DOI: 10.1190/geo2020-0327.1.
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