Indo-French Center for Groundwater Research

Self-potential (SP) signals that are generated under two-phase flow conditions could be used to study vadose zone dynamics and to monitor petroleum production. These streaming-potentials may also act as an error source in SP monitoring of vulcanological activity and in magnetotelluric studies. We propose a two-phase flow SP theory that predicts streaming currents as a function of the pore water velocity, the excess of charge in the pore water, and the porosity.

The NW—SE trending Nagaur—Jhalawar deep crustal seismic profile transect across the Aravalli—Delhi Fold Belt to delineate the crustal structure and infer about the tectonics of this region. Seismic and gravity analyses of this profile revealed a complex tectonic structure in the central part of the profile, including the presence of a crustal-scale thrust with surface exposure near Jahazpur and a domal structure beneath the Delhi Fold Belt (DFB).

Supply of sustainable water is a priority for urbanization of the country. Managed aquifer recharge (MAR) is recommended to enhance the groundwater resources, but finding the favorable site for MAR is quite challenging, particularly, in urbanized karst terrains because of highly heterogeneous and anisotropic properties of carbonate aquifers. The expansion along Naya Raipur is posing a severe threat to its groundwater resources by altering the hydrological framework in the area. In this work, we characterize the unsaturated zone for finding potential pathways for MAR in karst terrain of central India by using hydro-geophysical techniques. Sub-surface geophysical investigations including electrical sounding and profiling, captured the shallow surface of the area to the depth of around 40 m. The Wenner–Schlumberger and gradient methods could decipher strong lateral and vertical anomalies. The low resistivity in the unsaturated zone, as compared to the high resistivity of limestone bedr...

Knowledge of the existence of fracture zones, their extent, intensity and direction is very useful for assessing groundwater in hardrock regions and in this context geophysical methods are widely accepted as a powerful means of study. In the modern era of exploration, application of the Resistivity Imaging technique gives a new opportunity for groundwater study in hardrock regions. Exploration surveys were conducted at one of the important sites in Maheshwaram watershed, Andhra Pradesh, India with a multielectrode ...

Any scientific study is based on a number of information on the system or processes through measurement of parameters defining one or more properties of the physical system. In most cases these parameters change their values in space and sometimes in time also and hence they are called variables. Rainfall, effective recharge, thickness of an aquifer, hydraulic head, transmissivity, permeability, storage coefficient, etc. are the examples in hydrogeology. Although, these parameters are often highly variables but this spatial ...

ABSTRACT : DC electrical methods are among the most popular tools for groundwater exploration in both porous and fissured media. VLF methods less used than previous ones because their depth of investigation is more limited, permit location of conductive zones through an ...

Some of the most important hydrogeological parameters includes hydraulic head, transmissivity, aquifer thickness, storage coefficient, rainfall, and effective recharge for ground water management. They all are functions of space and are very often highly variable ( ...

The geology of the watershed (study area) is granites of Archaen age and the groundwater is threatened by the fluoride (F) contamination, as fluorine is the most abundant element in granites. This study consider? the effects of the hydrogeological parameters on the fluoride contents in groundwater. Two out of many observation wells located in the same geological structures have been taken for detailed analyses. One of them is in recharge area and the other one is in the discharge area. Frequent water samples were collected from ...

Abstract Knowledge of the existence of fracture zones, their extent, intensity and direction is very useful for assessing groundwater in hardrock regions and in this context geophysical methods are widely accepted as a powerful means of study. In the modern era of exploration, application of the Resistivity Imaging technique gives a new opportunity for groundwater study in hardrock regions. Exploration surveys were conducted at one of the important sites in Maheshwaram watershed, Andhra Pradesh, India with a multielectrode ...

ABSTRACT The paper presents semi-analytical mathematical model to estimate unsteady groundwater recharge resulting from variable depth of water in a large water body, influenced by time variant inflows and outflows. The model has been derived by integrating Hantush’s (1967) analytical expression for water table rise due to recharge from a rectangular spreading basin into the water balance equation of the water body. The model has been applied to a test study site in Raipur (India) for assessing viability of Managed Aquifer Recharge (MAR) from a lake located on an area dominated by the massive limestone formation. The components of the water balance equation have been carried out by the comprehensive analysis of the hydrological and hydrogeological aspects of the lake. The hydrological components include analysis of rainfall-runoff, evaporation rate, lake water quality and the hydrogeological components include aquifer characterization, parameters estimate, ambient groundwater level and quality. The time variant depth of water resulting from the interaction of water balance components, computed using the model, has been compared with the measured data and found a satisfactory match, as revealed from RMSE analysis. Compared to the inflows and lake storages, the recharge rates from the lake found very less, which ranged between 3.75 and 4.82 mm/day for depth of water ranged between 2.5 and 3.36 m. The lake water quality indicated contamination by bacteriological parameters (viz. Fecal coliform and Total coliform), turbidity and COD, exceeding the permissible limit of drinking water standards (IS-10500:2012). The aquifer formations below the lakebed and around possess thick limestone formation - a limiting factor for MAR-ASTR proposition, and hence no engineered hydrogeological intervention has been found viable to enhance the recharge rate.