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
Yakima River Delta Yakima River Delta The Yakima River Delta is an area of land in Richland, Washington where the Yakima River enters the Columbia River at River Mile 335. It hosts several protected areas and is crossed by State Route 240. This area is mostly floodplain with riparian-type growth, including non-native species such as Russian olive. Amon Creek enters the Yakima River in this area. The area is used extensively for recreational purposes, such as kayaking and hiking. The Sacagawea Heritage Trail, a bike path traveling through all three cities in the Tri-Cities, crosses the delta alongside State Route 240. The delta