Nuclear Hydrology Laboratory

The Nuclear Hydrology laboratory is equipped with modern instruments for measurement of stable and radioisotopes in water and sediments. The instruments are used for the study of soil moisture movement and estimation of recharge to groundwater, surface water and groundwater interaction, lakes studies, groundwater dating and identification of recharge sources and zones of deeper aquifers and springs.

Nuclear Hydrology Laboratory has three sub-sections, i.e., (i) Stable Isotope Laboratory, (ii) Groundwater Dating Laboratory, and (iii) Sediment dating laboratory. Important instruments available in the Stable Isotope Laboratory are: Dual Inlet Isotope Ratio Mass Spectrometer (DIIRMS), Continuous Flow Stable Isotope Ratio Mass Spectrometer (CFIRMS) for measurement of δD, δ13C, δ18O and δ34S in water and solids, Isotopic Water Analyzer (Liquid+Vapor) from LGR (Los Gatos Research) for measuring δ2H, δ17O, δ18O. Groundwater Dating Laboratory is equipped with Tritium Enrichment Units (2 No.), CO2 sample preparation lines, CO2 absorption line, Ultra Low Level Liquid Scintillation Spectrometer (Quantulus), Soil Moisture Extraction Units and Liquid Nitrogen Plant etc. Sediment Dating Laboratory has Multichannel Gamma Ray Spectrometer, Geolog Rate Meter, Neutron Moisture and Density Probe, Ultrasonic Depth Indicator. Two sets of radon detectors are also available in the laboratory.

The laboratory is also equipped with Ion Chromatograph System-5000 (Dionex) for analysis of major ions in water.

The Regional Centres and other divisions of the Institute also used the facilities of the laboratory for their technical studies. Facilities of the laboratory were also extended to various other departments/agencies like; PRL, Ahmedabad; NGRI, Hyderabad; JNU, New Delhi; NCAOR, Goa, IIT, Roorkee, IIT, Kanpur; IIT, Guwahati; Delhi University, Annamalai University; Central Ground Water Board etc.


The Hydrological Instrumentation Laboratory is equipped with conventional as well as modern equipment for various hydrologic measurements. Important instruments available in the laboratory include: Automatic Weather Station, Automatic Rain Gauges (Weighing type, Tipping Bucket type), Self Recording Rain Gauges (Siphon type), Automatic Snow Gauges (IMD type, Anti-freeze type and Weighing type), Digital Evaporation Recorder, Digital Wind Speed & Direction Recorder, Hand-held Anemometer, Non-Recording Rain Gauges, Evaporation Pan, Digital Surface Water Level Recorders, Digital Ground Water Level Recorders, Water Level Indicators (Sounders), Propeller Water Current Meter, Mini Current Meter, Ocean Flow Meter, Suspended Sediments Sampler, Depth Water Sampler, Weirs, Terrameter, EM Conductivity Meter, Digital Soil Moisture Meter, Digital Soil Moisture Recorder, Tensiometers, Guelph Permeameter for Hydraulic Conductivity, Soil Water Samplers etc.