The study looked at where sediment in the Yangtze River Delta comes from. They used magnetic properties to analyze sediment cores from the delta. They found that in the last 400 years, the northern part of the delta received more sediment from the Yellow River, while the southern part had more from the Yangtze River. This difference is due to how the rivers interact with tides in the delta channels. The findings show that the Yellow River delta to the north affects sediment in the Yangtze River Delta through coastal transport. This information is important for understanding how tide-dominated deltas like these may change in the future.