Abstract
The utilization of groundwater unwise leads to problems for the life of sentient beings. The majority of environmental damage, mainly by groundwater utilization, is done or caused by human activities. The land subsidence, drought, seawater intrusion are some examples of damage caused by groundwater utilization unwise. This research aims to estimate land subsidence in southern Bali and analyze groundwater level reduction with land subsidence. The PS-InSAR technique to monitor land subsidence has been carried out in several regions in Indonesia and other countries. In this study, 38 images of Sentinel-1 taken from February 2015 to December 2018 are used to analyze the PS-InSAR technique. Land subsidence is found in Denpasar Utara district and Kerobokan district with deformation in -8 mm to -19 mm and velocity up to -5 mm/year. The utilization of groundwater causing land subsidence in Southern Bali is no significant relationship with coefficient correlation 0,16 and influenced only 2,7%. Limited groundwater data also influences the correlation between groundwater utilization and the occurrence of land subsidence.
 Keywords: Land Subsidence; Sentinel-1A; PS-InSAR; Southern Bali.
Highlights
The utilization of groundwater unwise leads to problems for the life of sentient beings
The land subsidence, drought, seawater intrusion are some examples of damage caused by groundwater utilization unwise
Denpasar City and some of the Badung Regency areas are included in the Southern Bali area
Summary
The utilization of groundwater unwise leads to problems for the life of sentient beings. The majority of environmental damage, mainly by groundwater utilization, is done or caused by human activities. The land subsidence, drought, seawater intrusion are some examples of damage caused by groundwater utilization unwise. Subsidence areas are usually located where population and urban activity are developed (Suprabadevi, 2012a). Southern Bali is the area where the majority of tourism activities are located in the area. With the development of tourism activities in Southern Bali, tourism accommodation in the area such as hotels and restaurants proliferate. The regions included in the southern Bali area Denpasar, Kuta, Seminyak, Canggu, Kedonganan, Jimbaran, Ungasan, Uluwatu, and Nusa Dua. With the abundance of groundwater utilization in southern Southern Bali, the enormous potential of environmental damage can occur, especially land subsidence
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