Line momentum source in cross-flow

A series of jets in shallow water is represented as a line source of momentum in a two-dimensional flow. The flow field produced in the presence of cross-current is determined by a finite element solution to the governing shallow water equations. The effects of shoreline boundary and the magnitude of the cross-current are studied and the results are compared satisfactorily with experiments. The global flow features and the induced flow at the line source are in general well predicted. While in the case of strong cross-current the fine flow features around the source cannot be reproduced due to its three-dimensional nature.