Akademik Veri Yönetim Sistemi
Shaping the Change, XXIII FIG Congress, Hamburg, Almanya, 8 - 13 Ekim 2006, ss.1-14
The acoustic sounding method is densely used in hydrographic studies. For depth
measurement, elapsed time of an acoustic pulse which travels to the bottom and return again
is measured by acoustic depth measurement systems. If the velocity of sound propagation in the
water column is known, the depth is computed by using the time-velocity equation. On the
other hand, the travel time of the acoustic pulse depends on the sound velocity in the water
column which varies with the medium’s elasticity and density. Thus, true sound velocity in
water should be determined as accurately as possible to obtain depth accurately. There are
several different instrument and methods to determine the sound velocity. The aim of this
study is to estimate velocity of sound in water with different empirical formulae as well
indirectly by bar check calibration to verify the results. For this purpose, some field studies
were performed in the Halic and Istanbul Strait. The methodologies of these procedures are
explained in detail in the paper.