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
Delta River Delta River The Delta River is an tributary of the Tanana River in the U.S. state of Alaska. Its name in the Ahtna language is "Saas Na’ ". Fed by the Tangle Lakes of the Alaska Range, the river flows north to meet the larger river near Big Delta. In 1980, of waterways in the Delta River basin, including all of the Tangle Lakes and the main stem to within of Black Rapids became part of the National Wild and Scenic Rivers System. Of this, are designated "wild", "scenic", and "recreational". Easily accessible from the boat launch at the Tangle