The need to monitor the effectiveness of artificial reefs deployment upon installation is important to assess the degree of success and impacts to surrounding environment. Monitoring guidelines and procedures for artificial reef in tropical marine condition involves data collection around the artificial reef. Divers recorded the coral and fish aggregation around artificial reefs using high performance underwater camera for analyses and identification. From the preliminary coral identification analyses, ten types of different hard coral was found around the reef which dominated by Pocillopora sp. High number of fish assemblages was recorded from the data collection. Most of the fishes present at the study area are identified as coral reef fish species. These result highlight the important and capability of monitoring procedures to assess the success and impact of reef deployment to surrounding environment at tropical marine condition.
Pulau Kukup has been chosen for data collection because of it is known as high-density mangrove species in a total area 6.47 km2 of wetland. Before data collection, Pulau Kukup map was analysed using ArcGIS software. The island has been divided into four quadrant and each quadrant contained 10 random distributed plots to acquire the coordinate. This fieldwork was done from 30th September until 6th October 2020 and involved seven peoples and also a party from Perbadanan Taman Negara Johor (PTNJ). While PTNJ acts as a guide as long as we are on the island. The level of growth of mangrove which is sapling will be identified and recorded within 10m x 10m plot on the acquired coordinate. Identified mangrove saplings within the plot will be pick based on a range height between 1.3-4 m. The tree characteristics such as circumference, height, species and coordinate locations are recorded for further analyses. The picture was also taken for respective parts of sapling which are leaves, roots and trunk. Approximately one kilogram of the soil sample is collected for each sediment sample point and also one kilogram at 0.5 – 1.0 m depth in each plot.
National Water Research Institute Malaysia through Research Center for Coastal and Oceanography (hereafter known as NAHRIM) conduct research with the collaboration of Center for Coastal and Ocean Engineering & School of Civil Engineering, Universiti Teknologi Malaysia (hereafter known as UTM) for study “The role of sediment source on erosion and sedimentation at the coastal zone for the potential development of innovative shoreline protection and preservation system” in Year 2020. This study is part of the MoU between NAHRIM and UTM. The location of the study is coastal area along the Tanjung Sedeli, Johor.
The physical model of Ringlet Reservoir is an alternative study for investigating efficient sediment removal proposed at Hydraulic and Instrumentation Laboratory in National Water Research Institute of Malaysia (NAHRIM). Universiti Teknologi Malaysia (UTM) has been engaged by NAHRIM to develop a physical and numerical model to study the hydrodynamic and sediment transport pattern. Sungai Habu and Ringlet were tested up to three return period; 1-year, 5-years and 100-years. Groyne (access ram) is identified as control mitigation structure for halting the sediment movement apart from existing check dam. Hydrodynamic models (HEC-RAS 2D with additional overview of simulation in FLOW-3D) were used to simulate numerically the physical model experiment. Three materials (wood dust, sand and bakelite) were used for the sediment plume distribution pattern. Continue reading “Numerical Model Study on the Physical Model of Ringlet Reservoir, Cameron Highlands”
Two models (2D and 3D testing phase) were constructed at National Hydraulics Research Institute Malaysia (NAHRIM) in 2020. The main aim of 2D experiment is to observe the effect on the breakwater stability, damage and overtopping. Meanwhile, on the 3D experiment the main aims is to observe the wave attack, propagation and intrusion although effect on the breakwater stability and damage also monitored. Wave signals used in this project are generated from the Jonswap spectral.
This study aims to clarify the response of groundwater levels to the tides during Southwest monsoon (year 2018). Four monitoring wells are installed perpendicular to the beach with a tide gauge, a wave buoy and underwater current meter.
This course is an introduction to modeling hydraulic problems using an open-source finite volume method. The modeling procedure for several practical hydraulic examples (including convergence study) was demonstrated using HEC-RAS 2D. This short course took place at the Le Grandeur Palm Resort, Senai from 3-4 October 2020. This short course was organised by Center for Coastal and Ocean Engineering (COEI), Universiti Teknologi Malaysia (UTM) in collaboration with National Water Research Institute of Malaysia (NAHRIM).
The current state of the river will be determined by carrying out the following work:
- Bed and bank material data collection
- River geometry survey including river bed elevation, water surface and thalweg elevations (the deepest bed elevation for a cross-section)