The preliminary study on the
sediment size in Laut Tawar Lake, Takengon, Aceh Tengah District, Province of
Aceh
Ichsan Setiawan
Jurusan Ilmu Kelautan,
Koordinatorat Kelautan dan Perikanan, Universitas Syiah Kuala, Banda Aceh
23111. Email: ichsansetiawan@yahoo.com
Abstract. The purpose
of this research was to examine the sediment grains size in Lake Laut Tawar.
This research was done during Mei to June 2012. Five sampling stationse were
determined i.e. Toweran, Bintang, Klitu, Boom and Ujung Mumpar. Dry sieving
analysis method was used in this study with different diameter stage sediment
sieve such as 4.75 mm, 1.7 mm, 250 μm, 850 μm, 150 μm, 0.2 μm, and 0.063 μm.
The data was then weighed and calculated for percentages. The results showed
that the sediment in Toweran station was dominated by pebble and medium sand;
in Bintang station was dominated by pebble and coarse sand; in Klitu station
was dominated by pebble and medium sand; in Boom station was dominated of
colloid and remaining shells; and in Ujung Mumpar station was dominated of
pebble and coarse sand. Generally, the sedimen type was pebble and coarse sand.
Keywords: The dry sieving method; Stage sieve; Sediment grain
size
Abstrak. Penelitian ini bertujuan untuk mengetahui ukuran butir
sedimen di Danau Laut Tawar. Penelitian berlangsung pada Bulan Mei sampai Juni
2012. Lokasi sampling terbagi menjadi beberapa stasiun; Stasiun Toweran,
Bintang, Klitu, Boom dan Ujung Mumpar. Sampel sedimen disaring dengan ayakan
bertingkat dengan diameter 4,75 mm, 1,7 mm, 250 μm, 850 μm, 150 μm, 0,2 μm,
0,063 μm. Persentase berat fraksi sedimen dihitung berdasarkan saringan sedimen
bertingkat. Hasil penelitian menunjukkan bahwa sedimen di Stasiun Toweran
dominan kerakal dan batu yang diikuti pasir sedang, di Stasiun Bintang dominan
kerakal dan batu yang diikuti pasir sangat kasar, di Stasiun Klitu dominan
kerakal dan batu yang diikuti pasir sedang, di Stasiun Boom dominan koloid yang
diikuti sisa kerang-kerangan dan di Stasiun Ujung Mumpar dominan kerakal dan
batu yang diikuti pasir sangat kasar. Secara umum ukuran sedimen di Danau laut
Tawar adalah kerakal dan pasir sangat kasar.
Kata kunci : Metode ayak kering; Saringan bertingkat; Ukuran
butir sedimen
Sumber : Jurnal Depik