Kamarudin, Mohd Khairul Amri and Toriman, Mohd Ekhwan and Idris, Mushrifah and Azid, Azman (2015) SEDIMENT AND RIVER BASIN MANAGEMENT IN TASIK CHINI, PAHANG. In: RIVER BASIN AND NATURAL LAKE MANAGEMENT. Penerbit Unisza, Kuala Terengganu, pp. 151-158. ISBN 978-967-0899-05-3

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Sedimentation is the main determinant for the level of water quality and environmental health of a valley. Sediment or sedimentary can be defined as an eroded matter which is carried through the water regime to the deposition location. Suspended sediment usually contains colloidal matter which is microscopic and needs a low river velocity to be carried from one point to another. Whereas the sediment base load is a load with a striped centre in between of 0.2 mm to 2 mm depending on the basic structure of the rocks and soil surrounding the location (Kamarudin et al., 2009; Toriman et al., 2012). The sediment structure is formed during the settling process or immediately after the sediment matter is deposited and also before the sediment is compressed. The sediment problem has been going on for a very long period of time at the cliff area of Chini Lake and it has become more serious recently. Numerous “dipterocarp” forest areas surrounding the cliff of Tasik Chini has now become a secondary forest due to logging (Abdullah et al., 2013). This has resulted in soil degradation, interference to the soil physico-chemical characteristics, weathering process, soil erosion, and many other impacts thatis contributed to the increase of sediment. Besides that, the serious decrease of the water volume of the lake during the drought season has contributed to the sedimentation and caused the sediment flow rate to increase especially during the rainy season. All the sediment flow will enter the lake and flow towards to Chini River which is the only the passage out for the Tasik Chini to Pahang River. The sediment deposition in the river base causes the Chini River to be shallower. In between of 1995 and 1996 a dam was built to control the water level for the boat navigation facilities throughout the Chini River and Tasik Chini (Kamarudin et al., 2013; 2009; Toriman et al., 2013). The dam managed to overcome the water shallowing problem at the river and Tasik Chini thus made the movement of the tourist boat more flexible (Jaafar et al., 2010; Mohamad & Toriman, 2006). Nevertheless it did not possess a functional structure to carry the sediment out and finally traps and blocks the sediment to channel out to Pahang River. Besides that, the floods phenomenon that happens every time during the northeast monsoon has caused a back flow in Chini River which has resulted in the transportation of the sediment from Pahang River to Chini River. This article will discuss and scientifically identify the total formation of sediment, cause and next the problem solving suggestions for the serious sediment deposition concentration. The modelling simulation that will be performed in this study is vital to observe the effect towards the shape of the river cross section and river hydrology system.

Item Type: Book Section
Keywords: Sediment, Modelling, RIVER BASIN MANAGEMENT
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > Q Science (General)
Faculty / Institute: East Coast Environmental Research Institute (ESERI)
Depositing User: Dr. Mohd Khairul Amri Kamarudin
Date Deposited: 15 Nov 2015 07:09
Last Modified: 15 Nov 2015 07:09

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