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
Saskatchewan River Delta jurisdictional (provincial and federal) responsibilities associated with both the Saskatchewan River and the SRD, there is growing concern that resource management and planning decisions affecting the delta will become more difficult to effectively coordinate in the face of increasing environmental stresses, especially declining water supplies. This, in conjunction with increasing interest and expectations by aboriginal communities to become more actively involved in such decisions, has posed the need for more collaborative planning approaches in the future. Saskatchewan River Delta The Saskatchewan River Delta (SRD) is a large alluvial delta that straddles the border between the provinces of Saskatchewan and Manitoba