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
Pearl River Delta Economic Zone the way. In recent years, the development environment for indigenous private-owned enterprises has improved dramatically in the Pearl River Delta Economic Zone and local firms are now playing an ever-growing role in the region's economy. In this regard, Shenzhen, Dongguan, Foshan, and other parts of the Pearl River Delta Economic Zone have been at the forefront of private sector development in China. Pearl River Delta Economic Zone The Pearl River Delta Economic Zone () (once called 粤江平原), is in the Pearl River Delta region, the expansive delta lands of the Pearl River at the South China Sea. It consists of