Abstract

Groundwater is an important component of the global water cycle, and acts as a receptor and information carrier of global environmental changes. Therefore, it is of great importance to research the chemical evolution of groundwater under a changing environment. Historical data shows that groundwater hydrochemical types are becoming more complicated, groundwater quality is deteriorating and the scope of pollution is expanding. This is attributed to an increasingly dry climate and the gradual deterioration of the original ecological environment, together with the unreasonable groundwater exploitation and intense agricultural activities of the past 30 years. Climate change and human activities are intertwined, and are responsible for changing the original groundwater system and forming a new evolutionary system.

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