Driving factors analysis of groundwater regime after private wells close down

There are many influencing factors of groundwater level regime that are difficult for achieving accurate and overall conclusions with single factor analysis method. This paper analyzed the factors of groundwater level regime in the urban region of Baoji by principal component analysis method and came to the conclusion that groundwater extraction and leakage recharge of natural rivers were the two main driving factors influencing groundwater level regime, which is identical to the results of grey correlation analysis method. This provides a reliable theoretical basis for keeping a reasonable groundwater level in the urban region of Baoji.