Looking forward to the abovementioned conditions, this research is needed to elaborate on the effects of the reclamation to the marine resources in Teluk Lamong Multipurpose Port Terminal as the reclaimed product. In order to describe the impact of the port development, this study will analyze the shoreline changing, the current pattern modeling, as well as the Total Suspended Solid (TSS) modeling using the remote sensing data. The several numbers of expected objectives through this study are to get the set of scientific information on the shoreline changing in Teluk Lamong Multipurpose Port Terminal in the year of 2012 and 2020, to get the figure of current pattern in Teluk Lamong Multipurpose Port Terminal in the year of 2012 and 2020, and to elaborate TSS concentration through the modeling approach in Teluk Lamong Multipurpose Port Terminal in the year of 2012 and 2020. Hence, there is a set of methodologies and tools to cooperate with the information before and after the reclamation. The use of the Digital Shoreline Analysis System (DSAS) software to analyze coastline conditions. The using of Mike 21 to analyze the current pattern and TSS concentrations. In addition to the TSS analysis, it will also need a set of remote sensing data from the Google Earth Engine (GEE). The modeling and calculation give information about the End Point Rate (EPR) values and TSS values. The EPR values are 107.5 m/year, 59,625 m/year and 10,375 m / year. The TSS values are 0-20 mg/L, 20.1-40 mg/L, 40.1-80 mg/L, 80.1-120 mg/L and >120.1 mg/L. Moreover, the result shows the different values among the length of coastline, the current pattern, and TTS in the years 2012 and 2020. The difference in the coastline reaches 950 m at this latest 8 years. While it also brings the changing to the current pattern and sediment transport which show through its current velocity and sediment content per liter of seawater during high and low tide accordingly.
Dock C is one of the supporting facilities at PT. Petrokimia Gresik which functions as loading and unloading goods from ships to land and vice versa. Another benefit of the jetty is that it can significantly increase the company's production capacity. Dock C PT. Petrokimia Gresik. In the treatment of sedimentation in port it is necessary to analyze the current pattern and sedimentation rate early, because this is the first step to predict the amount of sedimentation contained in the port in a certain period of time. Several ways can be done to minimize the rate of sedimentation, one of which is the layout of Dock C to reduce the frequency of dredging. This study compares the sedimentation volume at the existing condition jetty and two alternative jetty that occur due to currents and waves, while modeling is done using Mike 21. The results of the existing jetty modeling show the sedimentation volume for 12 months was 20641.68 m3. Whereas the sedimentation volume from alternative jetty 1 and 2 produced for 12 months was 11293.56 m3 and 7426.2 m3. Modifications to the layout of the jetty provided were able to reduce the rate of sedimentation in Dock C, with the most optimal sedimentation volume for 12 months at 13215.48 m3
Pembangunan Dermaga C sebagai fasilitas baru di PT Petrokimia Gresik bertujuan untuk meningkatkan produktivitas perusahaan. Produktivitas ini terwujud dalam bentuk aktivitas percepatan bongkar muat barang yang diangkut dari kapal ke daratan atau sebaliknya. Namun, aktivitas ini akan terkendala di masa depan jika sedimentasi tidak diatasi dengan baik. Untuk mengatasi fenomena sedimentasi di suatu dermaga, perlu dilakukan analisis laju sedimentasi secara dini dengan mempertimbangkan faktor-faktor seperti karakteristik pasang surut, pola arus, dan profil gelombang. Beberapa cara dapat dilakukan untuk meminimalisir laju sedimentasi, salah satunya dengan memodifikasi layout dermaga dengan tujuan untuk mengurangi frekuensi pengerukan. Penelitian ini bertujuan untuk menganalisis laju sedimentasi di sekitar Dermaga C dan menghitung perkiraan volumenya. Dua layout alternatif dari Dermaga C eksisting diusulkan untuk meminimalisir bed level thickness yang dapat terjadi di dermaga. Penelitian ini menerapkan pemodelan numerik berbasis software MIKE 21. Hasilnya, layout alternatif 1 dan 2 untuk periode yang sama mampu mengurangi volume sedimentasi terhadap layout eksisting masing-masing sebesar 9348.12 m3 dan 13215.48 m3 atau memiliki persentase penurunan sebesar 45.3% dan 64.1%. Di antara layout alternatif 1 (LA1) dan 2 (LA2), layout kedua adalah rekomendasi yang paling optimal. Oleh karena itu, dapat disimpulkan bahwa modifikasi layout terbukti dapat menurunkan laju sedimentasi di Dermaga C. Construction of Port C as a new facility at PT Petrokimia Gresik aims to increase the company's productivity. This productivity is manifested in accelerating the loading and unloading of materials transported from ships to land or vice versa. However, this activity will be hampered in the future if the sedimentation is not handled correctly. Hence, the sedimentation phenomenon in a port needs to be overcome. It is essential to investigate the sedimentation rate by considering tidal characteristics, current patterns, and wave profiles. Various ways can be conducted to decrease the sedimentation rate, one of which is by modifying the port layout to minimize the intensity of dredging. This research aims to analyze the sedimentation rate around Port C and calculate the estimated volume. Two alternative layouts are proposed to minimize the bed level thickness on the Port C. This research applies numerical modeling based on MIKE 21 software. As a result, alternative layouts 1 and 2 for the same period can reduce the sedimentation volume to the existing layout by 9348.12 m3 and 13215.48 m3, respectively, or have a decreasing percentage of 45.3% and 64.1. %. The last layout is the most significant among alternative layouts 1 (LA1) and 2 (LA2). It can be emphasized that the layout modification is proven to decrease the sedimentation rate at Port C.
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