There are many factors that affect the groundwater level, such as evaporation, precipitation and climate temperature, etc., but the influence of the reservoir on the groundwater level is relatively large, which can not be ignored. Taking the groundwater level of a certain area and the local hydrogeology as an example, this paper constructs a prediction model of the influence of the reservoir water storage on the groundwater level, through different conditions, the influence on the groundwater level. Finally, it is concluded that the impoundment of the reservoir has a great impact on the groundwater level when the leakage prevention measures are not done well, especially in the reservoir with impoundment of more than one year, it will cause the rise of the local groundwater level, the salinization of the land and the swamping. Therefore, it is necessary to strengthen the monitoring of groundwater level around the reservoir and take appropriate and necessary measures to reduce the impact on groundwater level.<br>
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