Perubahan Garis Pantai di Perairan Muara Sungai Musi Hubunganya dengan Sedimentasi

Abstract

Musi Estuary is strongly influenced by various land activities such as plantations, industry, agriculture and others. These activities have a negative effect on the condition of these waters, one of which is sedimentation. Sedimentation is an important factor that must be considered during development such as port construction and reclamation. This study aims to analyzed the dynamics of shoreline changes in the Musi Estuary, South Sumatra associated with sediment characteristics and sedimentation rates in the area. This research was carried out by installing a sediment trap for 14 days. Trapped sediments were taken once a week and calculated the volume and rate of sediment accumulation. The results showed that the dominant sedimentary characteristics in Musi Estuary were dominated by clay and mud with sediment accumulation rates ranging from 86,63-97,97 mg/cm2/day. The results of the dynamics of shoreline changes in the form of abrasion at stations 2, 3, 4, 5 and 6 and sedimentation at Station 1. The highest land change by abrasion was found at station 6 with land changes ± 129, 83 meters in 5 years and land changes by sedimentation at station 1 with a reduction in land ± 13.31 meters in 5 years. Muara Sungai Musi merupakan perairan muara yang sangat dipengaruhi oleh berbagai aktivitas daratan seperti perkebunan, industri, pertanian dan lain-lain. Aktivitas tersebut memberikan efek negatif terhadap kondisi perairan tersebut, salah satunya adalah sedimentasi. Sedimentasi menjadi faktor penting yang harus diperhatikan pada saat melakukan pembangunan seperti pembangunan pelabuhan dan reklamasi. Penelitian ini bertujuan untuk menganalisis dinamika perubahan garis pantai di Perairan Muara Musi, Sumatera Selatan dikaitkan dengan karakteristik sedimen dan laju sedimentasi di daerah tersebut. Penelitian ini dilakukan pada bulan November 2019 dan pengambilan sampel dilakukan dengan memasang sedimen trap selama 14 hari. Sedimen yang terperangkap diambil seminggu sekali dan dihitung volume dan laju akumulasi sedimen. Hasil penelitian menunjukkan bahwa karakteristik sedimen yang dominan di Muara Musi didominasi oleh tanah liat dan lumpur dengan tingkat akumulasi sedimen berkisar antara 86,63-97,97 mg/cm2/hari. Hasil dinamika perubahan garis pantai dalam bentuk abrasi di stasiun 2, 3, 4, 5 dan 6 dan sedimentasi di stasiun 1. Perubahan lahan oleh abrasi tertinggi ditemukan di stasiun 6 dengan perubahan lahan ±129,83 meter dalam 5 tahun dan perubahan lahan oleh sedimentasi di stasiun 1 dengan pengurangan lahan ±13,31 meter dalam 5 tahun.

Detection of Shoreline Changes With Automated Water Extraction Index (AWEI) In Galur District, Kulon Progo Regency

“…This initiative aims to enhance the resilience of the coastline against abrasion. The point or area that undergoes the accretion process occurs at the mouth of the Progo River based on the results of the extraction of the coastline in 2018 and 2023, there are changes that show the widening of the river lips and based on field data, accretion occurs due to the rate of sedimentation formed following the river current and forming deposits that jut towards the river in Figure 12 The river carries sediment that starts from the mainland and settles in the estuary area which causes the advancement of the position of the coastline towards the sea [21]. This indicates that the presence of aerial photography technology can be utilized to map environmental characteristics [22], specifically the dynamics occurring along the coastline of Galur District.…”

Logam Berat Cd di Sungai Musi Bagian Hilir, Sumatera Selatan

“…Laju sedimentasi yang cukup tinggi di kawasan tersebut diduga menyebabkan terjadinya perubahan garis pantai. Hasil penelitian Barus et al (2020) menyatakan bahwa laju sedimentasi di daerah sekitar Tanjung Carat sebesar 97,97 mg/cm2/hari. Hal ini diduga berkontribusi terhadap peningkatan akumulasi nilai Cd di sedimen perairan yang ada di daerah tersebut.…”

The Effect of Bathymetry Changes on The Palu Bay Coastline Post Tsunami 2018

“…Coastline change is a continuous process through various processes, both erosion (abrasion) and addition (accretion) of beaches caused by sediment movements, longshore currents and waves [3]. Abrasion or coastal erosion is caused by the transport of sediment along the coast, resulting in the movement of sediment from one place to another [4] while accretion is the increase in land bordering the sea due to the deposition process, either by sediment material carried by rivers. as well as marine sediments [5].…”