The variation and influencing factors of the runoff and sediment entering sea in the Yellow River

Abstract

This paper analyzes the trend of runoff and sediment entering the Bohai Sea using the streamflow and sediment data of the Yellow River estuary hydrological station. The results shows that runoff and sediment into sea in the Yellow River both reduce in the recent 60 years, there is significant positive correlation between the two. And the influencing factors of runoff and sediment are also researched, it is found that there is no significant correlation between runoff and precipitation, or between sediment and precipitation. The increase of the water intake quantity from the river is the main reason of runoff reduction entering the sea. And soil and water conservation measures and water storage projects result in the decrease of sediment in the river estuary.