Rangarajan, R. ， Andrade, Rolland ， Muralidharan, D.
2025-11-01 JOURNAL OF INDIAN GEOPHYSICAL UNION 2025 29(卷), 6(期), (null页)
Remote sensing data inferred two major WNW-ESE trending lineaments with a spatial extent of about 3 km parallel to a stream course in Halia watershed located in the Nalgonda district, Telangana state of India. The watershed in semiarid zone is located in granite terrain, covered by red soils with a mean annual rainfall of 636 mm. Integrated study comprising hydrological, hydrogeological, geophysical, drilling, hydrochemical and tracer tests, were carried out during the period 2005 to 2006, to investigate groundwater movement through one of the two inferred lineaments. The observations on rainfall, groundwater level, natural recharge rate, groundwater flow velocity, streaming potential data and fluoride concentration of groundwater indicated that the inferred lineament does exists at deeper depth and in this, preferential flow is the dominant groundwater movement process with the flow velocity of about 14.9 m/d, considering effective porosity of granite/gneiss as 3%.