Abstract
Technologies to estimate the timing of breakup and ice sheet thickness in advance help with ensuring safety and developing work plans for construction work in rivers and flow observation in wintry conditions. In this study, non-contact measurement of ice sheet thickness was conducted until the thawing season to clarify the breakup phenomenon. To determine the factors affecting measured ice sheet thickness, the influences of three factors on thickness variations were evaluated quantitatively. In addition, a practical equation for ice sheet calculation using the air temperature, water temperature and effective water depth as independent variables was developed by Coefficient α and β based on an ice sheet thickness calculation model using heat flux.
