Sedimentology and sediment accretion rate in selected mangrove forest of the Kelantan Delta

Abstract

Study on accretion rate was done on Pulau Layang-layang, Pulau Kambing and Pulau Che Minah in the Kelantan Delta. They were chosen as sampling areas based on the density of vegetation. The sediment deposits were collected and accretion markers made of Perspex were buried on September 2006. Samples were collected based on transect lines was set-up with 3 m intervals sampling points and transects line was set­ up to determine the accretion rate for January and February 2007. Sediment samples were analyzing for sedimentological characteristic using laser diffractometer (MALVERN Master Sizer 2000). This study found that the accretion rate for January and February is significantly different. The average accretion rate for Pulau Che Minah is 1.61 cm m- 1 • Pulau Layang-layang with 1.29cm m- 1 and Pulau Kambing with 0.44cm m- 1 . For February, the average accretion rate is 1.11 cm m- 1 , is 0.30cm m- 1 and 1.13cm m- 1 for Pulau Layang-layang, Pulau Kambing and Pulau Che Minah respectively. Characteristic of surface sediment at three sampling sites are dominated by fine silt, poorly sorted, with varied of skewness but very leptokurtic.