Abstract: The transform relationship between surface water and groundwater is very complicated in Taoer River Fan because of the difficulties in determining the amount of water transform and the analysis of the affecting factors on this relationship. Through water balance method and groundwater budget approach, the transform amount of water from river water to groundwater is determined. In the water balance method, the local runoff yield is calculated firstly, and then the water transform amount is figured out by constructing a balance equation of surface water. In the groundwater balance approach, the transform amount is calculated by constructing a balance equation mainly of Quaternary phreatic groundwater. The main factors that influence the transfer relationship between surface water and groundwater mainly include lithology, precipitation, upper stream inflow and groundwater exploitation. Lithology is a stable factor, while the upper stream inflow and groundwater exploitation are unstable factors that directly influence the transform regularity.

Key words: Taoer River fan, water balance method, groundwater budget approach, transform amount, local runoff yield