Coastline changes in North Bengkalis Island, Indonesia: satellite imagery analysis and observation

Abstract

:Coastal area activity on human exploitation greatly affected aquatic ecosystems. Land changes disturbed the level of soil stability, soil will be easily eroded by the flow of water, the surface tide ran off to the sea. North waters of the island of Bengkalis is a place boiling down to several rivers, including the river Jangkang and river Liung. The rivers have affected the concentration of total suspended solid (TSS) in the strait waters of North Bengkalis Island. This research demonstrated water sampling by using sampling point determined by purposive sampling method mixing the layer of water depth ratio. The results based on satellite imagery data showed that TSS was quite high in the West season period until the transition period I (West to East) with a large concentration value of 200 mg / L. For the lowest TSS concentration occurred in the East season i.e., between 0 -200 mg/L. TSS concentrations that dominated in the East season ranged from 51 to 75 mg/L This value was higher than the TSS concentration of field data analysis, i.e., between 23 -39 mg/L. Changes of coastal coastline of North Bengkalis during the last 20 years continue to change the size of the land area, with a land area of 131 ha lost.

Relationship of Coastline and Mangrove Area in West Rangsang - Indonesia

“…Similarly, Handoyo et al (2014) in their study also reported that the erosion rate recorded in Bantar was about 9-10 m/y, while the change of rate in erosion and accretion of 5.36 m/year and 4.49 m/year in the coast was classified as high, based on the study by Natesan et al The coast of West Rangsang contains numerous peat deposits, as discovered from our observation. A similar coastal topography is also found in Bengkalis Island, which is a flat coastal zone and has abundant peat material [12], [13]. The peat material was light and of low density, so it was easily transported by the current drift [13].…”

“…A similar coastal topography is also found in Bengkalis Island, which is a flat coastal zone and has abundant peat material [12], [13]. The peat material was light and of low density, so it was easily transported by the current drift [13]. Moreover, deforestation of mangrove vegetation is triggered by excessive loss of peat deposits to the ocean.…”

“…Utilizing satellite imagery from Landsat thematic mapper (TM) and LDCM satellite (Landsat-8), the changes that occurred on the beach and mangrove from 1997 to 2017 were calculated to obtain their correlation. If the relationship can be revealed, the results can describe all shallow beach-marshes in the neighbour region and the most east coast of Sumatra because of their similarity in coastal morphology [13], [14]. So this research can serve a new scientific report in monitoring coastline and mangrove relations on the east coast of Sumatra Island.…”

Deteksi Perubahan Luasan Mangrove Dan Garis Pantai Menggunakan Data Penginderaan Jauh Di Area Tambak Ujung Pangkah Kabupaten Gresik Provinsi Jawa Timur

“…Dampak yang diakibatkan oleh faktor alami dan aktivitas manusia pada wilayah pesisir paling mudah dapat diamati dengan mengobservasi perubahan pada garis pantai (Harff et al, 2019). Perubahan garis pantai terjadi ketika adanya penambahan atau pengurangan garis pantai yang disebabkan oleh terjadinya sedimentasi atau yang berturut-turut disebut sebagai akresi dan abrasi (Mubarak, 2018). Faktor perubahan garis pantai karena akresi dan abrasi salah satunya terjadi ketika ekosistem mangrove mengalami kerusakan.…”

The Evidence of Coastline Changes in Banten Bay, Indonesia

“…To investigate the changes in the coastline, a large and long-time series data set which require a high budget are needed. As an alternative way, several studies have been reported on using satellite data [9][10][11][12] to analyze the coastal changes in several Indonesian coastal areas. A satellite remote sensing is recognized as an effective instrument to detect the coastline changes in a fast way without considering the Trends Sci.…”