River delta slope offshore, waves will make river deltas smoother. Waves can also be responsible for carrying sediments away from the river delta, causing the delta to retreat. For deltas that form further upriver in an estuary, there are complex yet quantifiable linkages between winds, tides, river discharge, and delta water levels. Erosion is also an important control in tide-dominated deltas, such as the Ganges Delta, which may be mainly submarine, with prominent sandbars and ridges. This tends to produce a "dendritic" structure. Tidal deltas behave differently from a river- and wave-dominated deltas, which tend to have a few main distributaries. Once
Nemunas Delta Nemunas Delta Nemunas Delta is the Lithuanian name for the Neman (Nemunas) River Delta, in Lithuania. Prior to post-World War II border changes, it was known in German as the "Memel Niederung", as the Neman was for centuries called the Memel in German. When it reaches the Baltic Sea, the Neman splits into a maze of river branches and canals, forming polders and wetlands that make it a very attractive destination for eco-tourism. The four main distributaries are Atmata, Pakalnė, Skirvytė and Gilija. In the centre of the delta lies Lithuania's largest island, Rusnė Island (5 km²), and its eponymous