scholarly journals BED SEDIMENT DISTRIBUTION IN THE RIVER ESTUARY AND COASTAL SEA OF MALILI (SOUTH SULAWESI, INDONESIA)

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Mahatma Lanuru ◽  
Syafyudin Yusuf
Keyword(s):  
River Estuary ◽  
Fine Sand ◽  
Management Plan ◽  
Organic Content ◽  
Bed Sediment ◽  
Sediment Distribution ◽  
South Sulawesi ◽  
Sea Bed ◽  
Sediment Organic Content ◽  
Coastal Sea

Bed sediment characteristics and distribution is one of the important parameters in determining the management plan and utilization of estuarine and coastal waters.  The objective of this study was to analyze sediment distribution and determine dominant oceanographic factors controlling the distribution of bed sediment in the river estuary and coastal sea of Malili. Sediment samples were collected using a grab sampler at ten stations, namely four stations in the river estuary and six stations in the adjacent coastal sea for grain size and sediment organic content analysis. The results showed that the bed sediment along the river estuary consisted of silt, very fine sand, fine sand, and medium sand with organic content varying from 1.31 to 7.18 %. In the coastal sea, bed sediment was dominated by silt with a higher organic content of 2.25 - 7.31%

The Distribution of Nucula Turgida (Bivalvia: Protobranchia) From Dublin Bay, Ireland, and the Effect of Sediment Organic Content

1986 ◽  
Vol 66 (1) ◽  
pp. 119-130 ◽  
Author(s):  
James G. Wilson ◽  
Colin Shelley
Keyword(s):  
Organic Matter ◽  
Clay Fraction ◽  
Fine Sand ◽  
Organic Content ◽  
Muddy Sand ◽  
Sediment Organic Content

Recent investigations (Walker & Rees, 1980; Davis & Wilson, 1983b) have shown that the protobranch bivalve Nucula turgida (Leckenby and Marshall) occupies an important niche in the ecology of Dublin Bay, where it is the dominant organism over much of the southern part of the outer bay. This is an area of moderately sorted fine sand (Harris, 1980) with a pelite (silt and clay) fraction of less than 10% and a consequently low percentage of organic matter of around 1% (Davis & Wilson, 1983 b). Trevallion (1965) described the N. turgida habitat as one of firm muddy sand, adding that the animals avoided mud due to their inability to maintain position or feeding and respiratory currents and also avoided gravel due to their inability to burrow in coarse substrates.

scholarly journals The Spatial Distribution of Bed Sediments at Krueng Cut Estuary: The Sieve Analysis Approach

2017 ◽  
Vol 12 (2) ◽  
pp. 69 ◽  
Author(s):  
Muhammad Irham ◽  
Ika Fibriarista ◽  
Sugianto Sugianto ◽  
Ichsan Setiawan
Keyword(s):  
Fine Sand ◽  
Distribution Patterns ◽  
Sieve Analysis ◽  
Bed Sediment ◽  
Medium Sand ◽  
Sediment Distribution ◽  
Sediment Size ◽  
Field Samples ◽  
Coastal Dynamic ◽  
Sand Size

This research studied the characteristic of bed sediment in the estuary of Krueng Cut, Banda Aceh. Analyzing the field samples from different site of stations along the channel from upstream to estuary shows different pattern and profile of deposited bed sediment. Therefore, sorting the size of sediment is important spatially because pattern of its deposition and characteristic will illustrate how distribution patterns indicate the nature of the channel.  Hence, the study aims to determain the pattern of bed sediment distribution as well as its profile spatially. To implement the intended purpose, the coring method was employed by using purposive random sampling for 15 stations of taken sampling. The sample of sediment was proceeded by using a 2,5 cm diameter of PVC paralon at the depth of 25 cm from the bathymetry base. Sample was analyzed using wet sieve analysis method. The result informed that the dominant of bed sediment size are medium sand found around the mouth of the river, fine sand existed along the mixing area, and very fine sand occurred in the transition zone. Inthe region of coastal dynamic, the sediment was dominated by medium sand size, meanwhile in the area of river dominated flow, the sediment is subject to fine sand size.Thus, the fraction of very fine sand size of sediment was found in the zona of transition.

scholarly journals SEDIMENT FRACTIONS AND ORGANIC MATERIALS IN THE DUMAI RIVER ESTUARY WATERS, RIAU, INDONESIA

2020 ◽  
Vol 1 (1) ◽  
pp. 66-71
Author(s):  
Syahril Nedi ◽  
Yolanda Manik ◽  
Elizal Elizal
Keyword(s):  
Organic Material ◽  
Organic Materials ◽  
River Estuary ◽  
Fine Sand ◽  
Chemical Factor ◽  
Purposive Sampling ◽  
Sediment Fraction ◽  
Mean Size ◽  
Negative Difference

The purpose of this researched was to analize the consistency of organic material and sediment fraction on estuary in dumai river. The research was with purposive sampling on four stutions. The analysis of sediment fraction in estuary in dumai river had been dominated by mud substract. The result mean size wened very fine sand, of consistency organic material is ranging 7,37 - 24,01 mg/l. The result sorting value wered poorly kurtosis value were ektremly leptokurtic, and skewness dominant value were negative. Difference of fine grafain and type of sediment on estuary in Dumai River had effect by physics and chemical factor.

Sediment pH and Redox Potential Affect the Bioavailability of Al, Cu, Fe, Mn, and Zn to Rooted Aquatic Macrophytes

1993 ◽  
Vol 50 (1) ◽  
pp. 143-148 ◽  
Author(s):  
Leland J. Jackson ◽  
Jacob Kalff ◽  
Joseph B. Rasnnussen
Keyword(s):  
Redox Potential ◽  
Metal Content ◽  
Aquatic Macrophytes ◽  
Organic Content ◽  
Trophic Levels ◽  
Sediment Organic Content ◽  
Sediment Ph ◽  
The Relationship ◽  
Sediment Metal

We have evaluated the role of sediment pH (4.7–7.1) and redox potential (88–305 mV) in determining the bioavailability of five metals to four species of isoetoid macrophytes. The four species (Eleocharis acicularis, Eriocaulon septangulare With., Isoetes sp., and Sagittaria graminae) did not differ significantly in the relationship between the contents of metals in plants and sediment. When data for all species were pooled, 28–80% of the variation in the log of plant metal content was explained by the log of sediment metal (Al, Fe, and Mn) or by the log of sediment organic content (Cu and Zn). Sediment pH explained 45% (Al), 10% (Cu), 20% (Fe), 5% (Mn), and 12% (Zn) variation over and above that explained by the sediment metal content. These results demonstrate that lower sediment pH, in the presence of mildly oxic redox conditions, increases the bioavailability of these five trace metals to rooted aquatic plants. Rooted macrophytes subject to acidification contain higher metal concentrations which may be transferred by grazing to higher trophic levels.

Suprabenthic crustacean fauna of a denseAmpeliscacommunity from the English Channel

1996 ◽  
Vol 76 (4) ◽  
pp. 909-929 ◽  
Author(s):  
Jean-Claude Dauvin ◽  
Souaad Zouhiri
Keyword(s):  
Atlantic Ocean ◽  
Water Column ◽  
Vertical Migration ◽  
Fine Sand ◽  
Abundant Species ◽  
Sexually Dimorphic ◽  
English Channel ◽  
Free Swimming ◽  
Sea Bottom ◽  
Sea Bed

Ninety-six species (97, 677individuals) were collected over the course of 6 h in five suprabenthic sledge hauls from a very denseAmpeliscafine sand community from the Bay of Morlaix (western English Channel). All the species migrated into the water column at night (98% of the specimens collected in the suprabenthos were found in the night hauls). The 23 most abundant species collected were classified into five groups based on their height within the water column, but two groups predominated: the upper suprabenthic species, abundant at 0–80–145 m above the sea-bed; and the lower suprabenthic species which were abundant only near the sea bottom (-0–1–0–75 m high). Three different patterns of nocturnal vertical migration were distinguished based on the timing of maximum swimming activity: at dusk; at the beginning of the night; or later in the night. Sexually dimorphic patterns of free-swimming behaviour was observed inAmpeliscaand some other species of Amphipoda (Bathyporeia teniupes, Metaphoxusfultoni), and Cumacea (Bodotria pulchella, Pseudocuma longicornis), with many more males than females migrating into the water column at night. Finally, the density of suprabenthic crustaceans in nocturnal hauls was amongst the highest reported from infralittoral or circalittoral suprabenthic studies on other parts of the Atlantic Ocean sampled during spring.

scholarly journals Carbon monoxide apparent quantum yields and photoproduction in the Tyne estuary

2011 ◽  
Vol 8 (3) ◽  
pp. 703-713 ◽  
Author(s):  
A. Stubbins ◽  
C. S. Law ◽  
G. Uher ◽  
R. C. Upstill-Goddard
Keyword(s):  
Carbon Monoxide ◽  
Natural Waters ◽  
Sea Water ◽  
River Estuary ◽  
Quantum Yields ◽  
Absorption Data ◽  
Coastal Sea ◽  
Order Of Magnitude ◽  
Good Proxy ◽  
Minimum Estimate

Abstract. Carbon monoxide (CO) apparent quantum yields (AQYs) are reported for a suite of riverine, estuarine and sea water samples, spanning a range of coloured dissolved organic matter (CDOM) sources, diagenetic histories, and concentrations (absorption coefficients). CO AQYs were highest for high CDOM riverine samples and almost an order of magnitude lower for low CDOM coastal seawater samples. CO AQYs were between 47 and 80% lower at the mouth of the estuary than at its head. Whereas, a conservative mixing model predicted only 8 to 14% decreases in CO AQYs between the head and mouth of the estuary, indicating that a highly photoreactive pool of terrestrial CDOM is lost during estuarine transit. The CDOM absorption coefficient (a) at 412 nm was identified as a good proxy for CO AQYs (linear regression r2 > 0.8; n = 12) at all CO AQY wavelengths studied (285, 295, 305, 325, 345, 365, and 423 nm) and across environments (high CDOM river, low CDOM river, estuary and coastal sea). These regressions are presented as empirical proxies suitable for the remote sensing of CO AQYs in natural waters, including open ocean water, and were used to estimate CO AQY spectra and CO photoproduction in the Tyne estuary based upon annually averaged estuarine CDOM absorption data. A minimum estimate of annual CO production was determined assuming that only light absorbed by CDOM leads to the formation of CO and a maximum limit was estimated assuming that all light entering the water column is absorbed by CO producing photoreactants (i.e. that particles are also photoreactive). In this way, annual CO photoproduction in the Tyne was estimated to be between 0.99 and 3.57 metric tons of carbon per year, or 0.004 to 0.014% of riverine dissolved organic carbon (DOC) inputs to the estuary. Extrapolation of CO photoproduction rates to estimate total DOC photomineralisation indicate that less than 1% of DOC inputs are removed via photochemical processes during transit through the Tyne estuary.

Regional patterns and local variations of sediment distribution in the Hudson River Estuary

2007 ◽  
Vol 71 (1-2) ◽  
pp. 259-277 ◽  
Author(s):  
F.O. Nitsche ◽  
W.B.F. Ryan ◽  
S.M. Carbotte ◽  
R.E. Bell ◽  
A. Slagle ◽  
...  
Keyword(s):  
River Estuary ◽  
Hudson River ◽  
Hudson River Estuary ◽  
Regional Patterns ◽  
Sediment Distribution

Profundal Sediment Organic Content and Physical Character Do Not Reflect Lake Trophic Status, but Rather Reflect Inorganic Sedimentation and Exposure

1992 ◽  
Vol 49 (7) ◽  
pp. 1431-1438 ◽  
Author(s):  
D. J. Rowan ◽  
J. Kalff ◽  
J. B. Rasmussen
Keyword(s):  
Organic Matter ◽  
Water Content ◽  
Bulk Density ◽  
Trophic Status ◽  
Organic Content ◽  
Sedimentation Rates ◽  
Lake Surface ◽  
Lake Trophic Status ◽  
Sediment Organic Content ◽  
Lake Surface Area

An analysis of profundal sediment data from 83 north-temperate lakes shows that increasing inorganic sedimentation and exposure (or lake surface area) results in lower organic content and water content, and greater bulk density. Because sedimentation rates are unavailable for most lakes, we estimate sedimentation rates from readily available catchment sediment loads using a mass-balance model. The mass-balance estimate of sediment retention (per square metre of depositional zone) is an excellent predictor of measured inorganic sedimentation rates for a data set covering 19 lakes (R2 = 0.92). Multiple regressions are used to predict organic content, water content, and bulk density of profundal sediment from inorganic sedimentation rates and either exposure or lake surface area, which are surrogates for the energy of the depositional environment. These analyses explain 76, 74, and 66% of the between-lake variation in the three sediment parameters, respectively. Sediment organic content is not related to lake trophic status (chlorophyll a) and is negatively correlated with net organic matter sedimentation rates. The common occurrence of organic-rich sediments in oligotrophic shield lakes is, therefore, not a reflection of high organic matter inputs, but rather the extremely low inputs of mineral sediments to these lakes.

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