School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded-431 606, Maharashtra, India E-mail: akumbharkhane@yahoo.co.in Department of Computer Science & Information Technology, Dr. B. A. Marathwada University, Aurangabad-431 004, Maharashtra, India Manuscript received 6 September 2006, accepted 8 February 2007 Picosecond time domain reflectometry method has been used in the frequency range of 10 MHz to 20 MHz to determine dielectric properties of aqueous solutions of triol in temperature range of 15 to 35 oC. The excess permittivity, Kirkwood correlation factor and Bruggeman factor of triol-water system have also been determined. A hydrogen bonded theory is applied to compute correlation terms for the mixtures. A hydrogen bonded model gives good qualitative account of the dielectric constant for triol-watt'r mixture.