Grain-size distribution and subsurface mapping at the Setiu wetlands, Setiu, Terengganu

Yaacob, Rosnan; Mustapa, Mohd Zaini

doi:10.1007/s12665-009-0236-9

Cited by 22 publications

(5 citation statements)

References 6 publications

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“…It is based on the reflected pulse waves from the beds of River or sea. These reflected waves have been recorded as seismic section, where consists of horizontal distance scale (m) and veritcal time Scale (msec) (Yaacob and Mustapa, 2010). The vertical Time Scale has been converted to depth scale (m) during the interpretation of seismic sections.…”

Section: Marine Geophysical Surveymentioning

confidence: 99%

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Detection of subsurface layers by Sub Bottom Profiling (SBP) of cross section of Shatt Al-Arab River at Al-Rebat branch, Basrah, southern Iraq

Muttashar

Al-Mosawi

Al-Aesawi

et al. 2022

MJMS

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Two types of the subsurface layers were investigated by two Boreholes on the two banks of the Shatt Al Arab River near the old Al-Rebat port at Basrah city. Sub Bottom Profiling along the River section has also been investigated. The boring was carried out in two sides of Shatt Al-Arab at Al-Ashar and Al-Tanuma sides at Al-Rebat square. Marine geophysical investigations were made including Sub Bottom profile technique (SBP) using the Strata Box instrument. Besides, Acoustic Doppler Current Profiler (ADCP) technique was used along a 400 m section for determining the cross section of the River. the Boring Log Data of two Boreholes have been represented depending on SPT Values as the bearing Strength of subsoil layers profiles, which is matching with the sedimentary layers resulting from the seismic profiles for obtaining the geotechnical model of subsurface layers along cross section of the River. High bearing capacity layer is very dense sandy layer which appears at -22m of the elevation on sea level and extends to -29 m in left bank of the River. This layer is old deposits belonging to Dibdiba deposits (upper Miocene-Pleistocene).

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Section: Marine Geophysical Surveymentioning

confidence: 99%

“…-The top layer is a fill sand soil from ground surface to ( 1 3. The Sub Bottom profiling (SBP) is used to determine thicknesses and lateral continuity of the bottom and Sub Bottom strata (Yaacob and Mustapa, 2010) (Fig. 6).…”

Section: Boring Log Datamentioning

confidence: 99%

Detection of subsurface layers by Sub Bottom Profiling (SBP) of cross section of Shatt Al-Arab River at Al-Rebat branch, Basrah, southern Iraq

Muttashar

Al-Mosawi

Al-Aesawi

et al. 2022

MJMS

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“…Dry sieve method was used in this study to give an insight about sediment grain size. Samples were dried for 24 h in an oven at range temperature between 60°C and 70°C as described in Rosnan and Zaini (2010). In this study, the dry sieve method is chosen because only sediments with grain size > 63m m were obtained.…”

Section: Sediment Analysismentioning

confidence: 99%

Rip current occurrence probability at selected recreational beaches along Pahang coastline

Hamsan

Ramli

2020

EFCC

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Purpose Pahang beaches draw more than thousand visitors throughout the year. From the year 2006 to 2018, more than 30 drowning and near-drowning cases were recorded mainly from rip currents. Rip currents are defined as unexpected currents that carried beachgoers away to seaward direction more than approximately 50 m from shore. The prediction of rip current development is very important for the protection of human life. This study aims to conduct preliminary survey and field works to identify rip current hazards. Design/methodology/approach The output would be an early warning preventative mitigation to public in Pahang. Beach state model, dimensionless fall velocity, littoral environment observation and relative tidal range were recorded for five recreational beaches during two different months (March and April 2018). The morphodynamic parameters such sediment fall velocity, sediment grain size and beach slope are then analysed using software PROFILER. Classification of risks was done based on beach morphodynamic model. The morphodynamics are classified as low tide bar rip, barred and low tide terrace associated with rip current, bar dissipative, reflective, non-bar dissipative, low tide terrace and ultra-dissipative. Findings Result shows three out of five recreational beaches may develop high-risk rip currents. During the first month of the survey, Batu Hitam (BH) was recorded the only one recreational beach that may develop high-risk rip current followed by Teluk Cempedak (TC) and Kempadang (KEM) as middle-risk rip current beaches, while Balok (BA) and Sepat (SEP) as low-risk rip current beaches. Different during second month of the survey, BA, BH and SEP were recorded as high-risk rip current beaches while TC and KEM as low-risk rip current beaches. Originality/value The results are consistent with beach incidents (drowning and near-drowning) reported.

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“…was significantly more abundant in station 1, where the sediment was mainly composed of medium and coarse sand. Since the presence of coarser fractions in the sediment indicates a greater hydrodynamics (Yaacob & Mustapa, 2010), station 1 can be considered a more unstable environment where few species adapt, specializing in occupying these niches with more space between the grains, where other species cannot colonize. Thus, the dynamism and force of currents in the areas near the connection to the sea can be considered as determining factors for the dominance of a few species.…”

Section: Infaunal Assemblagementioning

confidence: 99%

Distribution of benthic fauna in sediment grains and prop roots of a mangrove channel in south-eastern Brazil

et al. 2016

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We examined the benthic fauna in four areas along a mangrove tidal channel in south-eastern Brazil, between October 2008 and August 2009. The tested hypothesis is that the most abundant groups avoid competition as they occupy different types of substrata and that the longitudinal distance from the sea also affects the occurrence of benthic fauna along the channel. We also examined the prop root epibiont fauna to describe this different community. Polychaeta was the dominant group in the sediment whereas Isopoda and Tanaidacea were the dominant groups on the prop roots. We found a tendency for higher infauna species richness and diversity in the innermost channel area during the summer. Higher abundance of epibiont fauna was also found in summer with tidal movements allowing the colonization of the prop roots of the mangrove forest by some taxa. The polychaetes Ceratocephale sp. and Laeonereis acuta had indication of habitat partitioning, with the first occurring mainly in very fine sand sediment whereas the latter preferred medium sand sediment. The microcrustaceans Chelorchestia darwini and Tanaidacea sp. 1 occurred in high abundance colonizing the prop roots. Exosphaeroma sp. was found in high abundance in infauna and epibiont fauna. The tested hypothesis of spatial partitioning of the mangrove channel by the benthic fauna was confirmed with the most abundant species occupying the substrata with different grain fractions and prop roots in different stations.

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Grain-size distribution and subsurface mapping at the Setiu wetlands, Setiu, Terengganu

Cited by 22 publications

References 6 publications

Detection of subsurface layers by Sub Bottom Profiling (SBP) of cross section of Shatt Al-Arab River at Al-Rebat branch, Basrah, southern Iraq

Detection of subsurface layers by Sub Bottom Profiling (SBP) of cross section of Shatt Al-Arab River at Al-Rebat branch, Basrah, southern Iraq

Rip current occurrence probability at selected recreational beaches along Pahang coastline

Distribution of benthic fauna in sediment grains and prop roots of a mangrove channel in south-eastern Brazil

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