The palaeochannel is one of the promising features to hold a considerable amount of groundwater and acts as an underground reservoir for supplementing groundwater resources. There is a need for site-specific studies for exploring new areas for further groundwater prospecting in the wake of dwindling groundwater resources. The groundwater exploration studies have been conducted along and across the possible Saraswati River palaeochannel in a part of the Kurukshetra district of Haryana to understand the subsurface groundwater regime. Electrical resistivity tomography (ERT) surveys were conducted at Garhi Roran and Indbari villages of Kurukshetra district, Haryana. The ERT results indicate broadly three distinct lithological units up to the explored depth of 20 meters (m). The third layer showed relatively higher resistivity in comparison to the second layer. Therefore, vertical electrical sounding (VES) surveys were conducted in the study area at eight villages in the Kurukshetra district, including Garhi Roran and Indbari villages. The inverted model was correlated with the available lithological information for various lithological units. The maximum depth of investigation derived from the VES surveys was found to be 120 m. Further, a palaeo-path of high resistivity was delineated from 15 to 50 m depth and the width of the palaeochannel was interpreted as about 10–12 km. The hydrological data analysis of nearby bore wells shows a highly productive zone of good-quality groundwater. The analysis of Dar–Zarrouk ( D–Z ) parameters also indicates the presence of palaeochannel in the study area.

This paper reports the refractive indices ( ) of N,N-diethylethanamine + methyl acetate, ethyl acetate, propyl acetate, butyl acetate and pentyl acetate at 298.15 K and at different composition range. The various empirical correlations like Arago-Biot (AB), Gladstone-Dale (GD), Lorentz-Lorenz (L-L) Heller (H), Weiner (W), Newton (Nw) and Erying-John (E-J) were applied to experimental data for estimating theoretical value of refractive indices. For an equimolar mixture, the predicted deviation in refractive index values is consistent well with the experimental data. It has been found that the interactions between amine and different esters decrease when carbon chain length in ester increases. Also refractive indices are affected with change in temperature. To evaluate the standard deviation, RK polynomial equation was fitted to the measured refractive indices data.

In this work, densities ρ, speeds of sound u, and viscosities η, have been measured over the whole composition range for the binary mixtures of diethylene glycol monomethyl ether (DEGMME), CH3(OCH2CH2)2OH with 1-hexanol, CH3(CH2)5OH, 1-octanol, CH3(CH2)7OH, and 1-decanol, CH3(CH2)9OH at T = (293.15, 298.15, 303.15, and 308.15) K along with the properties of the pure components. By using the experimental values of ρ, u, and η, excess molar volume, VmE, deviations in viscosity, Δη, isentropic compressibility κS, deviations in isentropic compressibility ΔκS, deviations of the speed of sound Δu, have been calculated. The viscosity results have also been analysed in terms of some semi-empirical equations.