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
Skjern River Skjern River Skjern River () is the largest river in Denmark, in terms of volume. The river has its spring in Tinnet Krat in central Jutland, very close to Gudenå, another large river. It drains about one tenth of Denmark and discharges 206 m³/s (89,100 ft³/s) of water into the Ringkøbing Fjord - a lagoon and former bay of the North Sea. The river has its name from town of Skjern, located at the river delta (the only river delta in the country) at Ringkøbing Fjord. In the 1960s, the Danish government began straightening the rivers run and drain the