Investigation on the Dynamic Stability of the Berm Breakwaters

The development of erosion control structures as a mitigation to maintain the open coast beaches has grew well throughout the years. Breakwater is one of the methods to address the problem where it functions by reducing wave energy transmitted at the shoreline. The purpose of this study is to investigate the behavior and stability of the reshaping breakwater subject to the variations of wave characteristics. Apart from that, this research study is conducted to get a better understanding on how the reshaped profile will obtain its stability. The gradation and shape of the armor stone used as well as the design cross section of the physical model have been initially set as independent parameters

Investigation on the Dynamic Stability of the Berm Breakwaters

The development of erosion control structures as a mitigation to maintain the open coast beaches has grew well throughout the years. Breakwater is one of the methods to address the problem where it functions by reducing wave energy transmitted at the shoreline. The purpose of this study is to investigate the behavior and stability of the reshaping breakwater subject to the variations of wave characteristics. Apart from that, this research study is conducted to get a better understanding on how the reshaped profile will obtain its stability. The gradation and shape of the armor stone used as well as the design cross section of the physical model have been initially set as independent parameters

In silico molecular analysis of fructooligosaccaride producing enzymes

Putative glycosyl hydrolase (GH) 68 fructosyltransferase (FTase) from Streptococcus thermophilus (VUW839976.1) was identified as potential fructooligosaccharides (FOS) producing enzyme. Computational study using in silico molecular analysis was used as alternative approach to discover this potential enzyme

Pengaruh faktor keruangan dan masa dalam menentukan kadar pintasan hujan di kanopi hutan dipterokarpa, Tasik Chini Pahang.

The reduction of rainfall by interception process is influenced by two mechanisms namely climate and plant physiographic features. Climate features that affecting the interception loss including total rainfall (mm), wind speed (m/s) and temperature (°C). Meanwhile plant physiographic features that affect interception loss consists of tree’s height, skin, diameter, canopy, twigs and branches. Looking the role of climate and plant physiographic features in the interception process, this study was conducted in order to measure the throughfall, stem flow and interception loss and the factors that influence it. The assessment of throughfall and interception loss were carried out on study plot sized 100 x 100 meter in Dipterocarp Forest of Tasik Chini, Pahang. The study was conducted from October 2009 until January of 2010. Thirty tree samples are used and each tree is well-identified based on their species, family, diameter breast height (DBH), canopy size and its density. Four sets of throughfall were used to do throughfall measurements. Results of this study found that the value of throughfall and stem flow collected based on four rainfall events namely in October 2009 where 0.66 % (TF) and 99.34 % (SF), November 2009 – 0.54 % (TF) and 99.46 % (SF), December 2009 – 0.72 % (TF) and 99.28 % (SF) and January of 2010 – 0.49 % (TF) and 99.51 % (SF). Statistical analysis also indicates the existence of the relationship between total rainfall and interception loss with significant levels in 0.571 (r2) in December of 2009. This study provides important information that related to the hydrological cycle and how plant’s canopy can be acted as a medium of water balance in the environment

Pengurusan sedimen terhadap sumber air bersepadu: satu kajian kes di Sungai Chini, Pekan Pahang

Proses pengangkutan sedimen penting bagi pengukuran terhadap pelbagai aspek di dalam sesuatu aliran, termasuklah terhadap pengurusan sumber air bersepadu. Kajian analisis pengangkutan sedimen dan pengurusan sumber air bersepadu telah dijalankan di Sungai Chini, Pekan, Pahang pada 16/8/08 (musim normal) dan 4/12/08 (musim hujan). Satu-satunya aliran yang mengalir keluar dari Tasik Chini ke Sungai Pahang adalah Sungai Chini. Masalah sedimentasi yang berlaku di kawasan Sungai Chini memberi kesan yang besar terhadap penggunaan dan pengurusan sumber air di sekitar Tasik Chini. Jumlah sedimen yang banyak mendatangkan kesan terhadap penggunaan air masyarakat setempat, aktiviti rekreasi bagi tujuan pelancongan, pemendapan sedimen yang akhirnya menyebabkan sungai menjadi cetek dan berlakunya banjir. Kajian ini dijalankan bagi menganggar penghasilan muatan sedimen terampai di kawasan tadahan dan kesannya terhadap sumber air di sekitar Tasik Chini. Sebanyak tiga stesen persampelan telah dipilih, iaitu di Hulu Sungai Chini (S1), Tengah Sungai Chini (S2) dan Hilir Sungai Chini (S3). Bagi tujuan kajian ini, tiga parameter telah diukur, iaitu keratan rentas sungai, kepekatan sedimen terampai (mg/L) dan luahan sungai (dalam m3/s). Keputusan kajian yang diperolehi menunjukkan nilai luahan harian dianggarkan 136,656,000 L/hari pada musim normal dan 340,057,600 L/hari pada musim hujan. Purata konsentrasi sedimen terampai yang direkodkan bagi setiap stesen menunjukkan nilai berbeza bagi ke dua-dua jangka waktu, iaitu 40.8 mg/L pada musim normal dan 78 mg/L pada musim hujan. Nilai purata bagi ke semua stesen ini apabila ditukarkan kepada penghasilan muatan sedimen terampai per hari ialah di antara 318.329 tan/hari pada musim normal dan 3,192.155 tan/hari pada musim hujan. Secara keseluruhannya, angka ini jika ditakrifkan kepada setiap kilometer persegi menunjukkan anggaran purata sedimen yang diangkut keluar dari Tasik Chini ialah 1,755.242 tan/km²/tahun. Input daripada analisis ini penting dalam pengurusan sungai dan sumber air bersepadu khususnya dalam konteks sumber air bagi kegunaan tempatan, ekopelancongan, biodiversiti sungai, hidrologi dan hidraulik saliran