HAMIDAH, SITI (2023) SEBARAN TOTAL SUSPENDED SOLID (TSS) DAN SEDIMEN DASAR DI PERAIRAN TELUK AWUR JEPARA, JAWA TENGAH (23dos101). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Siti Hamidah. 26050119120018. Sebaran Total Suspended Solid (TSS) dan Sedimen Dasar Di Perairan Teluk Awur Jepar, Jawa Tengah. Sugeng Widada & Sri Yulina Wulandari)
Perairan Pantai Teluk Awur dimanfaatkan oleh masyarakat di sekitarnya sebagai kegiatan penangkapan ikan, pertambakan, pariwisata, bangunan pantai dan pendidikan. Kawasan Perairan Teluk Awur sering terjadi peristiwa pendangkalan akibat sedimentasi. Penelitian ini bertujuan untuk mengetahui sebaran sedimen dasar dan total suspended solid (TSS) di wilayah Pesisir Teluk Awur. Metode yang digunakan pada penelitian ini adalah metode kuantitatif. Data primer berupa sedimen dasar dan TSS. Data sekunder meliputi data angin, pasang surut, garis pantai, batimetri, dan peta rupa bumi Indonesia. Penelitian ini berlangsung pada tanggal 15 Oktober – 02 November 2022. Pengambilan sampel sedimen dasar menggunakan alat sediment grab dan TSS menggunakan botol nansen. Data arus diperoleh dengan menggunakan alat Accoustic Doppler Current Profiler (ADCP). Hasil penelitian menunjukkan sebaran jenis sedimen di Perairan Teluk Awur terdiri dari pasir, lanau, lanau berpasir, dan lempung. Sebaran ukuran butir sedimen pasir lebih mendominasi pada perairan ini. Sebaran ukuran butir sedimen pasir terdapat di daerah sekitar pantai, jenis sedimen lanau terdapat di laut lepas pantai. Distribusi ukuran butir sedimen dasar dipengaruhi oleh arus laut, yang kecepatan arusnya lebih kecil sehingga mengendapkan sedimen berukuran halus. Sebaran sedimen yang ada menggambarkan keadaan yang sudah terendap dengan keadaan arus masa lalu, yaitu 0,0044-0,18 m/s. Sebaran konsentrasi TSS pada permukaan, kedalaman 0,6D, dan 0,8D tertinggi terdapat pada lokasi yang berada di dekat aliran sungai dan pantai. Konsentrasi TSS yang rendah berada di laut lepas. Konsentrasi TSS di bagian permukaan perairan berkisar 54,8-84,2 mg/l, pada kedalaman 0,6D berkisar 59,4-119,2 mg/l, serta pada kedalaman 0,8D berkisar 59,4-116,2 mg/l. Pergerakan arus sangat mempengaruhi persebaran TSS. Kecepatan arus relatif rendah bergerak dominan menuju laut dengan kecepatan 0,02-0,28 m/s.
Kata Kunci : Sedimen Dasar, Total Suspended Solid, Arus, Perairan Teluk Awur

ABSTRACT
(Siti Hamidah. 26050119120018. Distribution of Total Suspended Solid (TSS) and Bed Load in Waters Teluk Awur Jepara, Central Java. Sugeng Widada and Sri Yulina Wulandari)
The waters of Teluk Awur Beach are utilized by the surrounding community for fishing, aquaculture, tourism, coastal buildings, and education. The waters of Awur Bay often experience siltation due to sedimentation. This study aims to determine the distribution of bottom sediment and total suspended solids (TSS) in the coastal area of Awur Bay. The method used in this research is the quantitative method. Primary data in the form of bottom sediment and TSS. Secondary data include wind data, tides, coastline, bathymetry, and Indonesian landform maps. This research took place on October 15 - November 02, 2022. A sampling of bottom sediments using a sediment grab and TSS using a Nansen bottle. Current data were obtained using Acoustic Doppler Current Profiler (ADCP). The results showed the distribution of sediment types in Awur Bay Waters consisted of sand, silt, sandy silt, and clay. The distribution of sand sediment grain size is more dominant in these waters. The distribution of sand sediment grain size is found in the area around the coast, and silt sediment types are found in the offshore sea. The grain size distribution of bottom sediments is influenced by ocean currents, which have smaller current velocities that precipitate fine-sized sediments. The existing sediment distribution illustrates the condition that has been deposited with the past current conditions, which is 0.0044-0.18 m/s. The distribution of TSS concentrations at the surface, 0.6D, and 0.8D depths was highest at locations near the river and beach. Low TSS concentrations are located in the open sea. The TSS concentration in the surface waters ranged from 54,8-84,2 mg/l, at a depth of 0.6D it ranged from 59,4-119,2 mg/l, and at a depth of 0.8D, it ranged from 59,4 116,2 mg/l. The movement of currents greatly affects the distribution of TSS. The relatively low current speed moves dominantly towards the sea with a speed of 0.020.28 m/s.
Keywords: Bottom Sediment, Total Suspended Solid, Current, Awur Bay Waters

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