Temporal variation of the beach profile trend and sediment variability at Tanjung Lumpur of Kuantan and Penarik of Terengganu

Abstract

Study on the beach morphology and the movement of sediments was conducted along the Penarik beach, Terengganu and Tanjung Lumpur beach, Pahang. This study mainly carried out in order to differentiate the shape of the beach and sediments characteristics between months which started from May to December 2011. The direction of the Net shore drift was also given a pattern which closely related to the sediment movement and beach profiles. Sampling was done in eight stations with the distance interval between each station range from 500 m to other station. Transit Sokkia C4,o was used to measure beach profile properties. Meanwhile, method of moments was employed to calculate the sediment logical parameters. According to the beach profile analysis, 4 out of six stations at Penarik beach and one of six stations at Tanjung Lumpur beach faced drastic erosion in the month of Disember 2011. Also two stations at Penarik beach and five stations at Tanjung Lumpr beach had their beach gradient increased. However in this case of study, the mean size was increasing which shows that area is maximized with coarse sand. Sorting of sediments during the monsoon indicates that five stations experienced increasing value of sorting. Increasing value sorting indicates that sediments in station 2 and 3 at Penarik beach and station 1, 3, 4, 5 and 6 are moderately and well sorted. However, station 1, 2, 4, 5 and 6 at Penarik beach and station 2 had undergoes decreasing sorting value. These means moderate and well sorting has taken place during the monsoon season. However, since the increasing value should be showing moderate and poorly sorted rather than well sorted. This is maybe due to that source of sediments carried by the waves are fine sand. Overall studies and based on the beach width and slope define that the sediment movement was from station 1 to station 6 at Penarik and station 6 to station l at Tanjung Lumpur.