scholarly journals ESTIMATION OF SEDIMENT ACCUMULATION RATE IN JAKARTA BAY USING NATURAL RADIONUCLIDE UNSUPPORTED 210Pb

2010 ◽  
Vol 7 (3) ◽  
pp. 309-313 ◽  
Author(s):  
Ali Arman Lubis ◽  
Barokah Aliyanta ◽  
Yulizon Menry
Keyword(s):  
Accumulation Rate ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Mixing Layer ◽  
Natural Radionuclide ◽  
Sediment Accumulation Rate ◽  
Gravity Core ◽  
Unsupported 210Pb ◽  
Pips Detector ◽  
Alpha Spectrometer

The investigation of sediment accumulation rate has been carried out in Jakarta Bay. The aim of this study is to estimate the accumulation rate of sediment  using natural radionuclide 210Pb as a tracer, through the profile of unsupported 210Pb. Sediment cores of 40 cm and 30 cm length were collected using gravity core from 2 locations (TJ22 and TJ17A) in Jakarta Bay. Samples were sliced at 2 cm length, prepared and analyzed using PIPS detector Alpha Spectrometer. The result shows that in TJ22 consist of 3 layers; LS1 in the depth of (0-2) cm as a mixing layer, LS2 (2-16) and LS3 (16-26) cm and TJ17A has 3 layers; LS1 in the depth of (0-6) cm, LS2 (6-18) cm and LS3 (18-24) cm. Accumulation rate of sediment of LS2 and LS3 in TJ22 are 0.583 cm/y and 0.074 cm/y and in TJ17A are 0,852 cm/y and 0.115 cm/y, respectively. The accumulation rate of sediment since 30 years ago is higher than previous period.   Keywords: Natural radionuclide, 210Pb, sediment, accumulation rate.

scholarly journals SEDIMENT ACCUMULATION PROFILE IN MANGROVE RESTORATION AREA OF LEMBAR BAY-LOMBOK ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 301-313
Author(s):  
Mohammad Sumiran Paputungan ◽  
Alan Frendy Koropitan ◽  
Tri Prartono ◽  
Ali Arman Lubis
Keyword(s):  
Accumulation Rate ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Coastal Region ◽  
Sediment Accumulation Rate ◽  
Ecosystem Functions ◽  
Sampling Location ◽  
Mangrove Restoration ◽  
Mangrove Area ◽  
Lombok Island

Mangrove restoration is really needed for restoring its ecosystem functions, so that it could be able to support fisheries activity and to protect coastal by extreme weather. In addition, mangrove is able to accumulate sediment that important in protecting the coastal area from sea level rise. Therefore,  the aim of this study is to investigate sediment accumulation rate in mangrove area during post restoration. Sampling location were divided into three different stations based on estimated restoration ages, such as ≥ 15  years old (Station 1), 4 - 10 years old (Station 2) and 2 - 8 years old (Station 3). Sediment cores were carried out by inserting 7.6 cm diameter and 100 cm length of polyvinyl chloride pipes. Sedimentation rate is measured by using Pb-210 radionuclide analysis. The results show that the sediment accumulation rate in the last 20th years from all station ranges from 0.17 to 0.42 g/cm2/year. The highest accumulation rate is found at oldest year old station while the lowest accumulation rate is found at younger year old station of mangrove restoration area. Restoration process is clearly able to recover the mangrove’s role in trapping sediment in coastal region. Keywords: sediment accumulation, mangrove restoration, Lembar Bay-                   Lombok Island 

scholarly journals PRELIMINARY STUDY OF SEDIMENT AGES AND ACCUMULATION RATES IN JAKARTA BAY DERIVED FROM DEPTH PROFILES OF UNSUPPORTED 210Pb

2010 ◽  
Vol 6 (3) ◽  
pp. 256-260
Author(s):  
Ali Arman Lubis ◽  
Barokah Aliyanta
Keyword(s):  
Accumulation Rate ◽  
Sediment Accumulation ◽  
Accumulation Rates ◽  
The Past ◽  
Unsupported 210Pb ◽  
Scuba Divers ◽  
Decay Series ◽  
238U Decay Series ◽  
Pips Detector ◽  
Preliminary Study

Preliminary study of sediment ages and accumulation rates has been carried out in Jakarta Bay using unsupported 210Pb. 210Pb occurs naturally in sediments as one of the radioisotopes in the 238U decay series. The total 210Pb activity in sediments has two components, namely; supported and unsupported. The latter derives from dissociation of 210Pb from 226Ra through diffusion of the intermediate gaseous isotope 222Rn which diffuse into the atmosphere and decay to 210Pb. 210Pb falling directly into seawater and deposit on the bed of the marine with sediments. 210Pb has half-life of 22.26 years makes it well suited to dating and determining the accumulation rate of sediments laid down over the past 100 - 150 years. Two cores samples with diameter 7.5 cm were taken by scuba divers from Jakarta Bay and were analyzed of 210Pb using α-spectrometer equipped with PIPS detector. The sediment ages and range of sediment accumulation rates of core I and II are up to 169 years and (0.25 - 1.93) kg/m2y and up to 157 years and (0.15 - 2.68) kg/m2y, respectively.  Keywords: sediment ages, accumulation rates, marine sediment, 210Pb

scholarly journals SEDIMENT ACCUMULATION PROFILE IN MANGROVE RESTORATION AREA OF LEMBAR BAY-LOMBOK ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 301
Author(s):  
Mohammad Sumiran Paputungan ◽  
Alan Frendy Koropitan ◽  
Tri Prartono ◽  
Ali Arman Lubis
Keyword(s):  
Accumulation Rate ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Coastal Region ◽  
Sediment Accumulation Rate ◽  
Ecosystem Functions ◽  
Sampling Location ◽  
Mangrove Restoration ◽  
Mangrove Area ◽  
Lombok Island

<p><em>Mangrove restoration is really needed for restoring its ecosystem functions, so that it could be able to support fisheries activity and to protect coastal by extreme weather. In addition, mangrove is able to accumulate sediment that important in protecting the coastal area from sea level rise. Therefore,  the aim of this study is to investigate sediment accumulation rate in mangrove area during post restoration</em><em>.</em><em> Sampling location were divided into three different stations based on estimated restoration ages, such as </em><em>≥ 15 </em><em> years old (Station 1), 4</em><em> </em><em>-</em><em> </em><em>10 years old (Station 2) and 2</em><em> </em><em>-</em><em> </em><em>8 years old (Station 3).</em><em> </em><em>Sediment cores </em><em>were </em><em>carried out</em><em> </em><em>by inserting 7.6 cm diameter</em><em> and 100 cm length of</em><em> </em><em>polyvinyl chloride</em><em> pipes. </em><em>Sedimentation rate is measured by using Pb-210 radionuclide analysis</em><em>. The result</em><em>s</em><em> </em><em>show that</em><em> </em><em>the sediment accumulation rate in the last 20<sup>th</sup> years from all station </em><em>ranges from 0.17 to 0.42 g/cm<sup>2</sup>/year. The highest accumulation rate is found at oldest year old station while the lowest accumulation rate is found at younger year old station of mangrove restoration area. Restoration process is clearly able to recover the mangrove’s role in trapping sediment in coastal region.</em></p><p><em> </em></p><p><strong>Keywords</strong>:<em> sediment accumulation, mangrove restoration, Lembar Bay-                   </em><em>Lombok Island </em></p>

scholarly journals Sediment Accumulation Rate in Sayung Coast, Demak, Central Java Using Unsupported 210Pb Isotope

2020 ◽  
Vol 46 (1) ◽  
pp. 25
Author(s):  
W.A. Gemilang ◽  
U. J. Wisha ◽  
T. Solihuddin ◽  
A. Arman ◽  
K. Ondara
Keyword(s):  
Accumulation Rate ◽  
Sediment Accumulation ◽  
Sediment Accumulation Rate ◽  
Central Java ◽  
Unsupported 210Pb

Pigment Preservation in Lake Sediments: A Comparison of Sedimentary Environments in Trout Lake, Wisconsin

1991 ◽  
Vol 48 (3) ◽  
pp. 472-486 ◽  
Author(s):  
James P. Hurley ◽  
David E. Armstrong
Keyword(s):  
Accumulation Rate ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Sediment Surface ◽  
Water Interface ◽  
Sedimentary Pigments ◽  
Sedimentary Environments ◽  
Trout Lake ◽  
Secondary Carotenoids ◽  
Β Carotene

Fluxes and concentrations of a phorbins and major algal carotenoids were quantified in sediment trap material and sediment cores from two basins of Trout Lake, Wisconsin (TrDH and TrAB). The basins were chosen to contrast the influence of oxygen content at the sediment–water interface (TrDH, oxic and TrAB, reducing), sediment accumulation rate, and focusing. Pigment diagenesis occurred in both basins, but transformations and destruction were more extensive in TrDH. Although untransformed chlorophyll a was the major phorbin deposited at the sediment surface of both basins (51–64 mol%), pigment destruction, coupled with transition to pheophytin, accounted for substantial losses, especially in oxic TrDH sediments. Fucoxanthin, peridinin, and diadinoxanthin, despite representing > 70% of the deposited carotenoid flux, were substantially degraded or transformed in both basins. However, preservation was relatively high for secondary carotenoids, such as diatoxanthin and β-carotene, and for a major cryptomonad pigment, alloxanthin. Residual profiles in sediments show that pigment sedimentation from the epilimnion and accumulation in the permanent sediments are not directly related and that diagenesis must be considered in interpreting sedimentary pigments.

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