Relationship between Runoff at Tangnaihai Hydrological Station and Beat Vortex in the Source Regions of Yellow River

Using daily mean runoff data at Tangnaihai hydrological station from 2002 to 2011 and earthquake records in East Asia,the series of beat vortex intensity index in the source region of Yellow River were calculated,and the relationship between the beat vortex index and the runoff at Tangnaihai hydrological station has been analyzed,aimed at searching the changes of underground thermal activity that control the flood discharge in the flood season,at affording warranty to the short-term forecasts of runoff,and at programming the use of water resources and preventing floods and drought in the upper reaches of Yellow River. The results show that the beat vortex has good correspondence to the abundant runoff with daily mean runoff anomaly percentage ≥50%,the time differences between the starting date of the abundant runoff period and the data of the beat vortex are mostly within a week,there is a positive correlation coefficient between the mean runoff during the abundant runoff periods and the beat vortex intensity indexes( α = 0. 01). It is of great significance to understand the coupling between earth and atmosphere.