Factors influencing surface water and groundwater interaction in alluvial fan

Abstract

In this study, the surface water balance method was used to calculate the interaction between surface water and groundwater (SGW) in the Taoer River alluvial fan in Jilin Province, China, from 1956 to 2014. The automatic linear model was used to determine the key and non-key influencing factors, and correlation analysis was performed to evaluate their relationship with one another. River runoff and groundwater level were the key factors affecting the SGW interaction, and sand–gravel exposure in the fan was more conducive to SGW interaction. There was a positive correlation between runoff and SGW interaction, and the relationship between the groundwater and surface water levels was correlated and affected by groundwater exploitation and groundwater runoff. Groundwater exploitation and evaporation and precipitation indirectly influenced the SGW interaction by affecting the groundwater level and river runoff key factors, respectively, and were considered non-key factors. HIGHLIGHTS The annual and monthly interactions of the Taoer River alluvial fan were calculated from 1956 to 2014.; They are influencing factors of the interaction between surface water and groundwater (SGW).; The influencing factors of SGW transformation are analyzed and classified.; The stability factor affecting SGW interaction is riverbed lithology.; The key factors affecting SGW interaction are river runoff and groundwater level.;

Keywords

• alluvial fan
• correlation analysis
• influencing factors
• sgw interaction
• taoer river