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 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 Guangzhou, Shenzhen, Zhuhai, Foshan, Dongguan, Zhongshan, Jiangmen, and parts of Huizhou and Zhaoqing, has been the most economically dynamic region of the Chinese Mainland since the launch of China's reform programme in 1979. Adjacent Hong Kong and Macau are not part of the economic zone. The 2008-20 plan, released by China's National Development and Reform Commission, is designed to boost the pan—Pearl