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Indonesian Journal of Oceanography Pub Date : 2022-08-27 DOI:10.14710/ijoce.v4i3.13443

Misbahul Diptya Pawitra, Elis Indrayanti, M. Yusuf, Muhammad Zainuri

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引用次数: 1

摘要

罗吉河河口是影响庇加兰海岸减少的河流河口之一，在那里它被用作船舶的交通通道。这将产生减少海洋深度的浅水。本研究旨在确定庇加隆河罗吉河口海流模式之间的联系。基本沉淀物样本是用沉淀物抓取和电流数据提取的，使用ADCP (Acoustic Doppler当前分析器)。电流建模使用MIKE21软件的水动力学2D方法。与此同时，沉淀物样本是用蒸发器和搅拌器处理的。这项研究的结果表明，在沙土、沙沙和淤泥中发现的基质沉淀物粒的大小。在潮汐条件下获得的电流模式为0.096 m/s，在0.18 m/s处退潮，在0.13 m/s处退潮，在0.15 m/s处退潮。洋流影响底部沉淀物的分布，较小的水流速度会导致沉淀物的轻微大小，比如河口的东部，而在河口的西部，随着沉淀物的轻微大小被悬挂，沉淀物的作用会增加。关键词:洋流模式，底部沉淀物，沉淀物的大小，河口这可能是由于切割可以减少海洋的深度。这项研究旨在确定在中环洛吉河埃斯图里的沉淀物和海洋currents之间的关系。底部的一小部分是用一种沉淀物抓取，用ADCP收集当前数据。目前采用MIKE21软件，采用2D氢动力模拟。我的意思是，小样本进行了筛子和皮质方法的处理。这项研究的结果表明，基地分布在沙质、沙质、沙质和沙质形式中。目前的趋势模式指示high tide上的当前速度是096 m/s，低tide是0.18 m/s, lowest ebb是0.13 m/s, high tide是0.15 m/s。海洋目前的底盘分布在学生目前持有的较低的底盘中，而在estuary东部则存在较低的沉淀物，因此在财务报表较低的地方存在较低的沉淀物。目前模式，沉淀物基地，沉淀物面积，泥石流艾塞利

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Sebaran Sedimen Dasar Perairan dan Pola Arus Laut Di Muara Sungai Loji, Pekalongan

Muara Sungai Loji merupakan salah satu muara sungai yang mempengaruhi sedimentasi Pantai Pekalongan, dimana muara ini digunakan sebagai jalur lalu lintas kapal. Hal tersebut dapat menimbulkan pendangkalan yang bisa mengurangi kedalaman laut. Penelitian ini bertujuan untuk mengetahui hubungan antara sedimen dasar dengan pola arus laut di Muara Sungai Loji, Pekalongan. Sampel sedimen dasar diambil menggunakan sedimen grab dan pengambilan data arus menggunakan ADCP (Acoustic Doppler Current Profiler). Pemodelan arus menggunakan pendekatan hidrodinamika 2D, dengan software MIKE21. Sementara itu sampel sedimen diolah menggunakan metode pengayakan dan pemipetan. Hasil dari penelitian ini menunjukan bahwa ukuran butir sedimen dasar yang ditemukan berupa pasir, lanau pasiran, dan lanau. Pola arus hasil pemodelan arus didapatkan kecepatan arus pada kondisi pasang yaitu 0,096 m/s, surut menuju pasang sebesar 0,18 m/s, surut terendah sebesar 0,13 m/s, dan pasang menuju surut sebesar 0,15 m/s. Arus laut mempengaruhi distribusi sedimen dasar dimana kecepatan arus yang lebih kecil akan mengendapkan sedimen dengan ukuran halus seperti di daerah sebelah timur muara, sedangkan di sebelah barat muara terdapat arus lebih tinggi sehingga mengendapkan sedimen lebih kasar karena ukuran sedimen yang halus mengalami tersuspensi. Kata kunci: Pola Arus, Sedimen Dasar, Ukuran Butir Sedimen, Muara Sungai Loji Abstract The estuary of the Loji River is one of the river estuaries that affects the sedimentation of Pekalongan Beach, where this estuary is used as a ship traffic lane. This can cause siltation which can reduce the depth of the sea. This study aims to determine the relationship between bottom sediment and ocean currents at the Loji River Estuary, Pekalongan. The bottom sediment samples were taken using a sediment grab and the current data collection using the ADCP (Acoustic Doppler Current Profiler). The current modeling uses a 2D hydrodynamic approach, using MIKE21 software. Meanwhile, sediment samples were processed using sieving and pipetting methods. The results of this study indicate that the grain size of the basic sediment found in the form of sand, sandy silt, and silt. The current pattern of the current modeling results obtained that the current velocity at high tide is 0.096 m/s, low tide is 0.18 m/s, lowest ebb is 0.13 m/s, and high tide is 0.15 m/s. Ocean currents affect the distribution of bottom sediments where a smaller current velocity will deposit fine-sized sediments such as in the east of the estuary, while in the west of the estuary there are higher currents so that coarser sediments are deposited because the finer sediments are suspended. Keywords: Current Pattern, Base Sediment, Sediment Grain Size, Loji River Estuary

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Indonesian Journal of Oceanography

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