The estuarinedelta area is abundant in sediment supply, and is a high modern sedimentation rate area.
河口三角洲地区泥沙供应充分，是现代沉积速率较高的区域。
2
The early to middle Jurassic coal-bearing deposition is mainly consisted of fluvial or lakeshore, estuarinedelta facies, lacustrine facies and slough facies.
蔚县煤田早中侏罗世含煤沉积，主要由河流或湖滨河口三角洲相、湖泊相、泥沼相组成。
3
Groundwater flow system of Shanghai area is part of regional flow system of Yangtze River delta; however, it has its own characteristics due to special environment of estuarinedelta.