Mohd Lokman Husain

Sediment accretion and variability of sedimentological characteristics of a tropical estuarine mangrove: Kemaman, Terengganu, Malaysia

This paper reports on a study of accretion rate and sedimentological variability in a estuarine mangrove swamp. One hundred and sixteen stations were monitored for 2 years. In addition, surface sediment samples were collected at 52 stations during the months of May, June and July (1994) to represent the non‐monsoon sediments and November, December (1994) and January (1995) to represent the monsoon sediments. Results show that the accretion rate for the first year was 1.46±0.13 cm/yr and 0.66±0.04 cm/yr for the second year thus making the average accretion for the 2 years period to be 1.06 cm/yr. The average accretion rate for the monsoon season (0.26 ± 0.04 cm/month) was found to be significantly higher than the non‐monsoon season (0.12 ± 0.03 cm/month). Nevertheless, the same is not true for the surface sediment characteristics. The sedimentological characteristics between the monsoon and the non‐monsoon sediments were not significantly different.

Open Sandy Beach Morphology and Morphodynamic as Response to Seasonal Monsoon in Kuala Terengganu, Malaysia

ABSTRACT Ariffin, E.H.; Sedrati, M., Akhir, M.F., Yaacob, R., and Husain, M.L,. 2016. Open Sandy Beach Morphology and Morphodynamic as Response to Seasonal Monsoon in Kuala Terengganu, Malaysia. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings of the 14th International Coastal Symposium (Sydney, Australia). Journal of Coastal Research, Special Issue, No. 75, pp. 1032 - 1036, Coconut Creek (Florida), ISSN 0749-0208. Understanding beach morphology and morphodynamic changes is important in regions where there is a large amount of recreation and development. Kuala Terengganu beaches has many anthropogenic infastructure such as an extension to an airport runway similar in design to a groin which affect morphology and morphodynamics in response to seasonal monsoon storms. Seasonal monsoon storms are one of the most important controls on the cycle of erosion and accretion on beaches. Beach profile data and wave modelling were used to determine the response of five beaches on the north of Kuala Terengganu to Northeast and Southwest seasonal monsoons. The beaches along the Kuala Terengganu state coast before the construction of the airport extension exhibited a classical morphodynamic response. This includes erosion during Northeast monsoon and accretion/recover during Southwest monsoon. The airport construction disturbed and changed normal coastal evolution. Two distinct sediment cells were generated, each having developed a proper morphodynamic response within the Northeast and Southwest monsoon wave regimes.