The analysis of coastline changes of maruni beach in Manokwari during 1995-2021 period

Abstract

The coastal area of Maruni at Manokwari Regency is known for its potential as a fish-producing area, industry, settlements, ports, and others. However, some parts of Maruni coastal areas have been damaged due to the development. The coastal area experienced changes caused by both natural processes and human activities. The presence of natural and artificial processes in coastal areas results in accretion and abrasion. The dynamics of oceanographic pressures such as sea tidal, sea waves, ocean currents, and tides occurring in the Maruni Beach area cause changes in the movement of sediments affecting the coastal area. Continuous changes can be a threat to Maruni coastal line as the Trans Papua Barat Road passed this route. This research was conducted with the aim to quantify the rate of coastline changes and oceanographic dynamics of Maruni coastal line at the south part of Manokwari Regency, Papua Barat Province from 1995 to 2021. The utilization of remote sensing interpretation method from Landsat 5 TM, Landsat 8 OLI, and oceanographic data providers (BIG, ECMWF) accommodated data source. The analysis result concluded that changes in the coastline at Maruni Coastal line during the 1995-2021 period predominantly encountered abrasion. The magnitude rate of change experienced a very small accretion, but was replaced by a very high abrasion event that occurred during two observation periods between 1995-2021.

Distribution and types of microplastics on the coast of Aipiri and Andai Beaches, Manokwari District, Indonesia

“…Sloping coastal slopes tend to have large high tide limits. These conditions indicated that the tidal area (coastal line) in Andai was under high pressure due to waves and tidal currents (Tapilatu et al 2022), so the sediment in the vicinity was eroded and displaced. It was indicated by the grain size of the sediments found to be more varied, including gravel, sandy, and muddy sand.…”