Groundwater Balance Evaluation for Groundwater Availability in Ngarawan Watershed, Belitung Timur Regency

Novis Ezuar, Martha Fani Cahyandito, Hendarmawan Hendarmawan

Abstract

The balance between groundwater availability and soil water requirements should always be maintained, so that the quantity and quality of the ground water remains sustainable. The development of Manggar city located in Ngarawan watershed, it is feared will disrupt the balance of ground water. The decrease of ground water level has been felt by the community during the dry season, so that the ground water balance analysis is needed, to know the balance between the availability and the need of ground water in Ngarawan watershed. The research method consists of calculation of ground water balance, groundwater requirement, geometric method, and descriptive analysis. The results show that the condition of ground water balance in Ngarawan watershed is still surplus, with changes in ground water savings of 8,903,116.38 m3 in 2016, but reduced to 3,468,570.18 m3 in 2034. Reduced changes in groundwater storage, due to changes land use and increased groundwater demand.

Keywords

Groundwater Demand, Ground water Availability, Ground water balance, Ground Water Reserve

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DOI: https://doi.org/10.24198/ecodev.v1i1.36230

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