It depends which NCIS you are referring to. CBS broadcasts NCIS, NCIS: Los Angeles, and NCIS: New Orleans. NCIS is aired on Tuesdays 8/7c. NCIS: Los Angeles is aired on Mondays 10/9 c. NCIS: New Orleans is aired on Tuesdays 9/8c.
Whereas groins are built to change the effects of beach erosion, jetties are built so that a channel to the ocean will stay open for navigation purposes. They are also built to prevent rivermouths and streams from meandering naturally.
Dunes play an important role both to the beaches that front them and the land behind them. Dunes act as a sand reserve for beaches. Dune systems act as a buï¬er between the high energy of the ocean and the land. Dunes provide a barrier to salt intrusion from high tides and storm surges, and it protects the land behind the dunes from erosion. The dunes in Florida are broken into ï¬ve zones.