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The Impact of Sanur Harbor Development on Shoreline Changes at Sanur Beach Using Sentinel-2 Satellite Imagery

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Abstract:

Morphological changes in shoreline areas are typically induced by the construction of structures in their vicinity. At Sanur Beach, the impact of the harbor's development is evident in shoreline changes, primarily in the form of accretion in the northern part of the breakwater. This study examines shoreline changes from 2018 to 2023, utilizing a remote sensing approach with Sentinel-2 Satellite Imagery. Sentinel-2 satellite image data in the Sanur Beach area undergo a process to generate a shoreline change map. The analysis is carried out using the Digital Shoreline Analysis System (DSAS) plugin in ArcGIS to determine the rate of change in meters/year and the area in m2. The simulation results indicate shoreline changes as follows: in the period of 2018-2019, there was a tendency towards erosion with an average rate of-4.28 m, continuing into 2019-2020 with a rate of-4.62 m. The most significant change occurred in 2020-2021, characterized by erosion, with the highest rate being-7.28 m compared to the previous year. However, in 2021-2022, the change pattern shifted towards accretion at a rate of 11.88 m, and in 2022-2023, there was a tendency towards accretion at a rate of 4.01 m. These changes are influenced by the hydrodynamic factors at Sanur Beach, where the dominant wind directions are towards the east and southwest, resulting in the prevailing seaward flow from north to south. After the construction of Sanur Harbor, the shoreline changes tended to exhibit accretion, in contrast to the pre-construction period dominated by erosion.

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Periodical:

Construction Technologies and Architecture (Volume 16)

Pages:

31-42

DOI:

https://doi.org/10.4028/p-uH8VRl

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Online since:

March 2025

Authors:

Ni Nyoman Pujianiki*, Gde Rai Putra Arya Simpangan, Silvia Gabrina Tonyes, Komang Gede Putra Airlangga, I Nengah Simpen, Muhammad Shazril Idris Bin Ibrahim

Keywords:

Sanur Harbor, Sentinel, Shoreline Change

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