The hydraulics theory and wind-wave modelling are used to model annual changes of a threshold (sand bar) height at the mouth of the Narva River in 2002. The changes in the threshold height are attributed to two mechanisms: the cross-shore sediment transport driven by the river flow that erodes the obstacle and the long-shore transport forced by waves that increases the threshold height. It is shown that the flow stratification in the river mouth switches between one- and two-layer modes in different seasons, depending on variations of water level, river discharge and wave activity.
|Number of pages||16|
|Publication status||Published - 1 Jan 2007|
Laanearu, J., Koppel, T., Soomere, T., & Davies, P. A. (2007). Joint influence of river stream, water level and wind waves on the height of sand bar in a river mouth. Nordic Hydrology, 38(3), 287-302.