The valleys were the sourceofsediment that was carried downstream and dumped into the deltas.
河流峡谷将会是沉积物的重要来源，这些沉积物是被河水携带着，顺流而下汇集到三角洲的。
2
In Meizhou bay, the strong tidal stream transports its mud and sand from open sea, but is restricted to a certain extent, making the terrigenous clasts of the bay the main sourceofsediment.
湄州湾强劲的潮流导致外海泥沙输入，但受一定程度的限制，海湾周围的陆源碎屑成为沉积物质的主要来源。
3
The studies of those that stable rare earth elements trace soil erosion process and several nuclides are compounded together to distinguish sourceofsediment are also summarized and evaluated.