Kajian Karakteristik Sedimen Dasar di Perairan Sungailiat untuk Mendukung Pengembangan Pelabuhan Perikanan Nusantara Sungailiat, Kab. Bangka

Abstract

Tingkat sedimentasi di muara S. Jelitik sangat tinggi sehingga ketika air laut surut, kapal-kapal tidak dapat keluar masuk ke Pelabuhan Perikanan Nusantara (PPN) Sungailiat. Untuk menangani masalah tersebut, pemerintah secara periodik melakukan pengerukan yang berbiaya tinggi. Oleh karena itu, Pemprov Bangka Belitung merencanakan membangun infrastruktur pengendali sedimen. Dalam perencanaan infrastruktur pengendali sedimen diperlukan data-data karakteristik sedimen dasar. Saat ini kajian khusus karateristik sedimen dasar di kawasan ini masih belum ada. [A1] Oleh karena itu dilakukan kajian ini dengan tujuan mengetahui pola sebaran karakteristik sedimen dasar seperti berat jenis, tekstur sedimen, ukuran d50 butir sedimen dan analisis stastik sedimen dasar. Karakteristik ini sangat penting untuk kajian sedimentasi selanjutnya terutama sebagai data masukan perhitungan kecepatan sedimentasi baik secara analitik maupun dengan pemodelan numerik. Metode yang digunakan dalam kajian ini adalah survei lapangan, pengambilan sampel sedimen dasar, analisis laboratorium dan analisis statistik sedimen. Berdasarkan kajian ini sedimen dasar di perairan Sungailiat ini didominasi oleh pasir sedikit campuran kerikil dengan nilai d50 berkisar antar 1-1,5 mm dan terpilah buruk. Kondisi sedimen dasar berupa pasir mempunyai daya dukung yang baik untuk pengembangan pelabuhan.Sedimentation in the S Jelitik estuary is very high, so when the tide is low, the ships traffic at the Sungailiat Fisheries Port is disturbed. So far, dredging has been done to solve this problem, which requires high costs. To overcome this, the Provincial Government of Bangka Belitung plans to build a sediment control infrastructure. In planning the sediment control infrastructure, sea bottom sediment characteristics data are needed. Currently, there is no specific study of se bottom sediment characteristics in this area. Therefore, this study was conducted with the aim of knowing the distribution pattern of seabottom sediment characteristics such as density, sediment texture, d50 grain size and analysis of the basic sediment statistics. This characteristic is very important for further sedimentation studies, especially as input data for calculating the sedimentation velocity both analytically and by numerical modeling. The methods used in this study are field surveys, sediment sampling, laboratory analysis and sediment statistical analysis. Based on this study, the seabottom sediment in Sungailiat waters is dominated by sand, a little mixture of gravel, with d50 values ranging from 1-1.5 mm and poorly segregated. The seabottom sediment in the form of sand have good capacity for port development.

Distribution Analysis of Green Mussels (Perna viridis) in Banyuurip Village, Ujung Pangkah District, Gresik Regency

“…The higher the shell roundness index value, the rounder the shell will be. High levels of water pollution can cause deformation or malformation of the shell [20]. The shell roundness index value of green mussels in Banyuurip had a higher value than those in the research conducted by [20] in Makassar, with a shell roundness index value of 0.12%.…”

“…High levels of water pollution can cause deformation or malformation of the shell [20]. The shell roundness index value of green mussels in Banyuurip had a higher value than those in the research conducted by [20] in Makassar, with a shell roundness index value of 0.12%. This shows that green mussels in Banyuurip were less healthy than the green mussels in Makassar.…”

Total suspended solid distribution as impact tin mining at surrounded Pangkalpinang seawater Bangka Island

“…The high percentage of sand fraction in Pangkalpinang waters is thought to be due to the strong current velocity in these waters. If sediment is dominated by coarse sediment grains, then this indicates the strength of the flow carrying the sediment is quite large, on the contrary, if it is dominated by fine-sized sediments, it indicates the weak strength of the sediment transporting the sediment [17].…”

Efektifitas Kinerja Cekdam dalam Upaya Pengendalian Sedimentasi Danau Rawa Pening

“…Dari sembilan anak sungai yang bermuara ke Danau Rawa Pening, pada tahun 2019 telah dibangun 3 cekdam di Sungai Legi, Sungai Parat dan Sungai Sraten (Alfianto et al, 2021) Pembangunan cekdam ini merupakan alternatif penanggulangan dan pengendalian laju sedimentasi di suatu Daerah Tangkapan Air (Julia, 2017) Sedimentasi didefinisikan sebagai proses alamiah yang mengakibatkan material sehingga material yang terlarut di dalam air mengendap. (Rachman et al, 2021). Total sedimentasi di Danau Rawa Pening pada tahun 2020 mencapai 4.752.961,04 ton (Indrayati & Hikmah, 2018).…”