The bridge shown in the figure is Hohenzollern bridge located in Cologne city of Germany. It is built over Rhine river. Originally the bridge was both railways and road but after 1945 it is only rail bridge and now it is most busy railway bridge of Germany. it constructed between 1907 and 1911.
The Groins are hard structures and used to maintain uplift beaches as to restrict longshore sediment transportation form tasking place. Are meant to capture sand transportation by the currents.
While the jetty is another type of shore perpendicular structure that is placed adjacent to the tidal inlets and controls the inlet migration. Both of them are used to destabilize coastal systems and disrupt the natural sediment regimes.
