Recent Sedimentation Rate and Sediment Ages Determination of Kemaman-Chukai Mangrove Forest, Terengganu, Malaysia

Kamaruzzaman, B. Y.; Ong, Meng Chuan

doi:10.3844/ajabssp.2008.522.525

Cited by 12 publications

(6 citation statements)

References 11 publications

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“…Comparably high values of 0.5–1.8 mm/yr are also known from the precolonial Chesapeake Bay (Donoghue, 1989). Such high sedimentation rates are especially well documented from tropical mangals, ranging from 1.2 to 2.4 mm/yr (Lynch et al, 1989; Smoak and Patchineelam, 1999; van Santen et al, 2007) up to c. 11 mm/yr (Kamaruzzaman and Ong, 2008). Moreover, high sedimentation rates were supported by synsedimentary tectonic activity generating a depocenter in the Korneuburg Basin.…”

Section: Geological Settingmentioning

confidence: 93%

Millennial-scale vegetation dynamics in an estuary at the onset of the Miocene Climate Optimum

Kern

Harzhauser

Mandić

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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Pollen analyses have been proven to possess the possibility to decipher rapid vegetational and climate shifts in Neogene sedimentary records. Herein, a c. 21-kyr-long transgression-regression cycle from the Lower Austrian locality Stetten is analysed in detail to evaluate climatic benchmarks for the early phase of the Middle Miocene Climate Optimum and to estimate the pace of environmental change.Based on the Coexistence Approach, a very clear signal of seasonality can be reconstructed. A warm and wet summer season with c. 204-236 mm precipitation during the wettest month was opposed by a rather dry winter season with precipitation of c. 9-24 mm during the driest month. The mean annual temperature ranged between 15.7 and 20.8 °C, with about 9.6-13.3 °C during the cold season and 24.7-27.9 °C during the warmest month. In contrast, today's climate of this area, with an annual temperature of 9.8 °C and 660 mm rainfall, is characterized by the winter season (mean temperature: −1.4 °C, mean precipitation: 39 mm) and a summer mean temperature of 19.9 °C (mean precipitation: 84 mm).Different modes of environmental shifts shaped the composition of the vegetation. Within few millennia, marshes and salt marshes with abundant Cyperaceae rapidly graded into Taxodiaceae swamps. This quick but gradual process was interrupted by swift marine ingressions which took place on a decadal to centennial scale. The transgression is accompanied by blooms of dinoflagellates and of the green alga Prasinophyta and an increase in Abies and Picea. Afterwards, the retreat of the sea and the progradation of estuarine and wetland settings were a gradual progress again.Despite a clear sedimentological cyclicity, which is related to the 21-kyr precessional forcing, the climate data show little variation. This missing pattern might be due to the buffering of the precessional-related climate signal by the subtropical vegetation. Another explanation could be the method-inherent broad range of climate-parameter estimates that could cover small scale climatic changes.

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Section: Geological Settingmentioning

confidence: 93%

Millennial-scale vegetation dynamics in an estuary at the onset of the Miocene Climate Optimum

Kern

Harzhauser

Mandić

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The two sites had a wide range from positive skewness ( 0.64 phi ) at the river inlet to positive skewness (0.30phi) at the river outlet indicating strongly skewed toward fine grains in both studied plains( Fig.4-B). A positive skewness means that there is an excess of fine grain sizes which could be due either to the addition of fine sediment to the deposits or to the selective removal of the coarser grain ( Kamaruzzaman, 2008).…”

Section: Resultsmentioning

confidence: 99%

Size Distribution and Sorting Degree of the Recent Sediments of Al-Khazer River/ Northern Iraq

Hassan¹

2012

Mesopotamia Journal of Agriculture

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Mechanical and statistical analysis were conducted to determine the grain size distribution and sorting degree of the recent sediments of Al-Khazer river at northern of Iraq in order to clarify the sedimentation processes along this river. The study was carried out after the annual flood time of the river. Sediment size distribution was determined mechanically for major grain size fractions [gravel (-2 phi to 0 phi), sand (0 phi to +4 phi), silt (+5 phi to +7 phi)] and clay (+8 phi)] using sieve and pipette technique. Numerical treatment of grain size curves has been done on the basis of some quintiles read from the empirical cumulative distribution function (CDF) curve: phi median size, sorting, skewness and kurtosis.The results showed that the sediments of this river were relatively coarse grained textured (Ø 50 =0.35 to 1.2 phi), very poorly sorted, showing strongly coarse skewed towards fine particles and are platy to leptokurtic. The increase in phi toward outlet plain is equivalent to decrease in grain diameter and is indicative of a lower energy and higher depositional environment. For this reason, there are some relatively lower phi values in the inlet plain in comparison with the phi values of outlet plain. On the basis of this assumption, the change in sediment-size distribution along the river is a non-linear fashion and can be inferred from that to which the present deposition takes place by bed or graded suspended load.

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“…210 Pb is an isotope that decays to 222 Rn, a gas that can escape from the earth crust to the environment (Choy et al, 2007). The concentration of 210 Pb within the sediment form by a source input overlying water through sedimentation, in-situ production and also radioactive decays (Kamaruzzaman and Ong, 2008). These present study explore the sedimentation behaviors of the sediment by looking at the vertical profile of 210 Pb, U, Th and Pb that has been accumulated in the dam.…”

Section: Introductionmentioning

confidence: 93%

Determination of Sediment Profile for <sup>210</sup>Pb, Pb, U and Th from Sultan Abu Bakar Dam Due to Soil Erosion from Highland Agriculture Area, Cameron Highlands, Malaysia

Hamzah

Riduan

Saat

2011

American Journal of Environmental Sciences

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Problem statement: Sultan Abu Bakar Dam in Cameron Highlands act as a catchment's to accumulate all eroded soil carried by the run off flow through Bertam River, the main river that passes through the highland agriculture area. All suspended solid that carried out by the river contain various kind of hazard potential to the environment. U, Th and Pb are the potential hazard elements carried out by water and accumulate at the dam. Approach: Five sampling point were selected where five 30cm core collected at each sampling point. Each core were sliced at 2cm and homogenized.210 Pb in homogenize sliced was determine using Alpha Spectrometry method. Plot of concentration against depth produce vertical distribution profile of the elements. This study will measure the activity of

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Recent Sedimentation Rate and Sediment Ages Determination of Kemaman-Chukai Mangrove Forest, Terengganu, Malaysia

Cited by 12 publications

References 11 publications

Millennial-scale vegetation dynamics in an estuary at the onset of the Miocene Climate Optimum

Millennial-scale vegetation dynamics in an estuary at the onset of the Miocene Climate Optimum

Size Distribution and Sorting Degree of the Recent Sediments of Al-Khazer River/ Northern Iraq

Determination of Sediment Profile for <sup>210</sup>Pb, Pb, U and Th from Sultan Abu Bakar Dam Due to Soil Erosion from Highland Agriculture Area, Cameron Highlands, Malaysia

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