Author(s): K. I. Rossinsky; A. A. Kondrastskaya
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Keywords: No Keywords
Abstract: The river run-off control, with the help of the water storage reservoirs, entails considerable changes in the river ice regime. The water freezing and ice break-up processes under dammed conditions, become calmer as compared to the natural river conditions. Within the transient region, however, favourable conditions for ice jam formation occur. Analysis of the process of the break-up of the rivers and nearby lakes makes it possible to forecast the time the reservoirs are cleared of ice. In the majority of cases, the reservoirs are Iiberated from the ice at a later time compared with the river and it shortens the navigation period. The creation of dammed stretches allows ice-breaking operations which can prevent ice jam formation in the backwater tail zone and speed up the navigation opening. Run-off control can facilitate the break-up conditions of the river in the downstream reach. The smooth increase of warm water releases from the reservoir drives away in advance the ice edge down the river, making the ice break-up conditions of the river in the downstream stretch easier.
Year: 1974