Evaluates subsurface characteristics in a hard-rock river basin, highlighting implications for groundwater and infrastructure.
Key Points
The research aims to quantitatively assess soil and rock penetration characteristics within the crystalline basement of the Lower Thamirabarani River Basin.
Utilized Vertical Electrical Sounding (VES), Electrical Resistivity Imaging (ERI), and Magneto Telluric (MT) surveys to analyze subsurface characteristics.
Conducted Standard Penetration Tests (SPT) to evaluate soil strength and composition.
Performed grain-size analysis to determine sediment distribution and characteristics.
Analyzed spatial variations of sediment fractions across different basin sectors.
Identified dominant groundwater-bearing zones between 30 and 70 meters depth with varying resistivity values.
Established a correlation between lithological heterogeneity and penetration resistance.
Demonstrated that finer sediment fractions lead to low-permeability layers, while coarser sediments have higher load-bearing capacity.
Developed a quantitative model of subsurface variability specific to crystalline rock environments.