Distribution of sediment grain size in Kajhu coastal area, Aceh Besar District, Indonesia

Abstract

Abstract Kajhu coast located in Baitussalam sub-district, Aceh Besar district. This location was once hit by a tsunami. Currently, the Kajhu coastal area continues to change, among which changes occur in new sediment deposits which are quite rapid around the estuary followed by an increase in the rate of erosion on the other side of the estuary. This phenomenon resolves rehabilitation plants to become extinct. This research conducted to analyze the distribution of sediment grains in the Kajhu coastal region. The distribution of sample grain size determined by the dry sieving procedure. Sediments sorted into grain size fractions of 4.75 mm, 1.70 mm, 850 μm, 200 μm, 100 μm. Then the sediment weight calculated based on Shepard's triangle. The results showed the Kajhu Coast research area had three sedimentary fractions namely gravel, sand, and mud with the gravel highest percentage at station 2 (33.72%), the sand highest percentage at station 4 (97.27%) and the mud highest percentage found at station 6 (24.61%).