NADHIF, MUHAMMAD ALWAN (2023) STUDI SEBARAN MATERIAL PADATAN TERSUSPENSI MENGGUNAKAN MODEL HIDRODINAMIKA 2D DI MUARA SUNGAI LOJI, PEKALONGAN (23dos142). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Muhammad Alwan Nadhif. 260 501 171 300 45. Studi Sebaran Material Padatan Tersuspensi Menggunakan Model Hidrodinamika 2D Di Muara Sungai Loji, Pekalongan. Agus Anugroho Dwi Suryoputro dan Baskoro Rochaddi ).
Muara Sungai Loji merupakan salah satu muara di Kota Pekalongan yang dalam beberapa tahun terakhir mengalami penurunan kualitas perairan. Hal tersebut dikarenakan sedimen yang tersuspensi yang berasal dari laut terbawa oleh arus pasang surut menuju muara serta Sungai Loji yang membawa sedimen dari hulu yang kemudian mengalami pengendapan di Muara Sungai Loji. Penelitian ini bertujuan untuk mengetahui sebaran material padatan tersuspensi di Muara Sungai Loji serta daerah yang berpotensi mengalami kekeruhan. Untuk itu dilakukan pendekatan model hidrodinamika menggunakan Mike 21 Modul Hidrodinamika dan Modul Mud Transport. Hasil dari model tersebut berupa data arah dan kecepatan arus serta data material padatan tersuspensi selama 1 bulan yang kemudian dapat diketahui pola sebarannya. Hasil pemodelan diketahui bahwa
material padatan tersuspensi dominan dipengaruhi oleh debit sungai dan bergerak mengikuti pola arus pasang surut. Saat kondisi pasang material padatan tersuspensi bergerak mendekati daratan, sedangkan saat surut material padatan tersuspensi tersebar di perairan dan bergerak mengarah ke lautan.
Kata Kunci : Material Padatan Tersuspensi, Muara Sungai Loji, Arus Pasang Surut, Mud Transport, Debit Sungai

ABSTRACT
(Muhammad Alwan Nadhif. 260 501 171 300 45. Study of Suspended Solid Distribution Using the 2D Hydrodynamic Model in The Esthuary of The Loji River, Pekalongan. Agus Anugroho Dwi Suryoputro dan Baskoro Rochaddi ).
Loji River Estuary is one of the estuaries in Pekalongan City which in recent years has experienced a decline in water quality. This is due to suspended sediments from the sea carried by tidal currents to the estuary and the Loji River which carries sediments from upstream which then experience deposition in the Loji River
Estuary. This study aims to determine the distribution of suspended solids material in the Loji River Estuary and areas that have the potential to experience turbidity. For this reason, a hydrodynamic model approach was carried out using Mike 21
Hydrodynamics Module and Mud Transport Module. The results of the model are in the form of data on current direction and velocity as well as data on suspended solids material for 1 month which can then be known for its distribution pattern. The modeling results show that the suspended solids material is dominantly
influenced by river discharge and moves following the tidal current pattern. During high tide conditions the suspended solids material moves closer to land, while during low tide the suspended solids material is scattered in the waters and moves
towards the ocean.
Keywords : Total Suspended Solid, Loji River Estuary, Tidal Currents, Mud Transport, river discharge

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