Ride-up and Pile-up of Ice-cover in Lake Ogawara

Abstract

In spring of 1987, a large ice movement and ice ride-ups on the shore of Lake Ogawara in Aomori Prefecture were observed. About 15 cm thick ice cover invaded inland 23 m deep and piled up 1 m high. Calculation of wind shear stress as an ice driving force resulted in 600 tons. As a conclusion, ice formation and its movements could cause considerable loads on hydraulic structures, and it is strongly recommended to pay enough attension for possible damages of structures by ice.