Abstract

One of the goals of building a dam is an effort to overcome the problem of water availability in an area. These problems include lack of water during the dry season and excess water during the rainy season. Excess surface water during the rainy season will be collected into the reservoir and will be used gradually when the availability of surface water starts to decrease. The purpose of this study was to determine the effect of water level in a reservoir to the changes in the groundwater level around it. The hypothesis of this study is that the increase in reservoir water level affects the groundwater level around it. Observation of water level in Pandan Duri reservoir and well water level in Sakra Subdistrict was used in this study as research material to determine the effect of reservoir water level on the surrounding groundwater level. The results showed that the water level of a reservoir had a significant effect on the groundwater level of the surrounding area. This is evidenced in this study, where it is known that changes in the well water level in Sakra District, around the Pandan Duri Dam have experienced significant changes following changes in the water level of the Panda Duri Dam.

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