The Analysis of Flow Conditions at Odra River Mouth

Abstract

The analysis of flow conditions at the Odra River outlet is presented. The flow at the river outlet is controlled by the discharge coming from the upstream and by the sea water level. Along the outlet distance (from Gozdowice to Trzebież) very small free water surface slope occurs: 10-5 and on the distance Gryfino – Trzebież:10-6. The very small slope causes small free water surface elevation differences difficult to be measured. The sea level changes produces backwater curve upstream the river. So the resulting slope and depth must include both factors: flow and sea level. The backwater curve extends horizontally up to Gozdowice river cross section i.e. about 140 km upstream. An essential factor is to predict water level at that distance depending on the river flow and the sea level. A proposal of mathematical description of the backwater curve on the considered distance is given.
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