scholarly journals Assessment of selected contaminants in streambed- and suspended-sediment samples collected in Bexar County, Texas, 2007-09

2011 ◽  
Author(s):  
Jennifer T. Wilson
Keyword(s):  
Suspended Sediment ◽  
Bexar County ◽  
Sediment Samples

scholarly journals Suspended Sediment Variability at the Solimões and Negro Confluence between May 2013 and February 2014

Geosciences ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 265 ◽  
Author(s):  
Thiago Marinho ◽  
Naziano Filizola ◽  
Jean-Michel Martinez ◽  
Elisa Armijos ◽  
André Nascimento
Keyword(s):  
Suspended Sediment ◽  
Satellite Images ◽  
Suspended Sediments ◽  
Left Bank ◽  
Sediment Samples ◽  
Negro River ◽  
The World ◽  
The Right ◽  
Sediment Variability ◽  
Solimões River

This study focuses on the confluence of two major rivers of the world, the Solimões River (white waters) and Negro River (black waters). Surface suspended sediment samples (SSC) and spectroradiometer taken along transverse profiles at 500 m intervals over a distance of 10 km, as well as satellite images (MODIS) during the hydrological year, were used to follow suspended sediment variability. In January and February, the confluence is dominated by white waters from the Solimões River in the two banks, and in June and July in the right bank by black waters from the Negro River and in the left bank by clear waters from the Solimões River. We found that indirect tools, such as reflectance obtained by spectrometer or MODIS images, can be used to determine surface suspended sediments in a contrasting zone.

scholarly journals Hubungan Pengendapan Suspended Sedimen dengan Kerapatan Mangrove pada Perairan Romokalisari, Surabaya

2019 ◽  
Vol 8 (4) ◽  
pp. 355-360
Author(s):  
Muhammad Yusuf Arifin ◽  
Nirwani Soenardjo ◽  
Chrisna Adhi Suryono
Keyword(s):  
Data Analysis ◽  
Suspended Sediment ◽  
Deposition Rate ◽  
Sediment Sample ◽  
Sedimentation Rates ◽  
Sediment Samples ◽  
Mangrove Area ◽  
A Value ◽  
One Way Anova

ABSTRAK: Romokalisari merupakan bagian hilir dari sungai Lamong, dimana daerah tersebut merupakan daerah pasang surut dan rawan terhadap banjir. Romokalisari banyak ditumbuhi oleh mangrove yang sangat rapat. Tujuan penelitian ini adalah untuk mengetahui pengaruh kerapatan mangrove terhadap laju pengendapan suspended sedimen pada perairan Romokalisari, Surabaya. Sampel sedimen diambil dari 8 stasiun yang terbagi dalam wilayah muara, mangrove dan laut, dimana masing-masing stasiun diulang 4 kali dengan periode setiap minggu. Analisis sampel sedimen menggunakan metode hydrometer dan analisis data menggunakan One Way Anova. Hasil penelitian menunjukkan bahwa ada perbedaan laju pengendapan suspended sedimen antara muara, mangrove dan laut, dengan nilai p = 0,046 < 0,05. Laju pengendapan suspended tertinggi terdapat pada stasiun 1 di wilayah muara dengan nilai sebesar 86,97 g/cm2/minggu dan laju pengendapan suspended terendah terdapat pada stasiun 2 di wilayah mangrove dengan nilai sebesar14,36g/cm2/minggu. ABSTRACT: Romokalisari is downstream part of the Lamong River, where the area is tidal and prone to flooding. Romokalisari is overgrown by very dense mangroves. The aim of this study was to determine the effect of mangrove density on suspended sediment rate in Romokalisari, Surabaya. Sediment sample were taken from 8 statios divided into estuaries, mangroves, and sea areas, each station was repeated 4 times with periods each week. Analysis of sediment samples using a hydrometer and data analysis using One Way Anova. The results showed that there were differences in suspended sedimentation rates between estuaries, mangroves and seas, with a value of p = 0,046 < 0,05. The highest suspended deposition rate is at station 1 in the estuary area with a value of 86.97 g/cm2/week and the lowest suspended deposition rate is at station 2 in the mangrove area with a value of 14.36 g/cm2/week.

Effects of storage before analyzing suspended sediment samples from lakes, rivers, and estuaries

1985 ◽  
Vol 55 (4) ◽  
pp. 613-615 ◽  
Author(s):  
J. McManus ◽  
R. W. Duck ◽  
A. H. A. Alrasoul ◽  
J. D. Thomas
Keyword(s):  
Suspended Sediment ◽  
Sediment Samples

Evaluasi Level Toksik Logam Berat pada Air, Sedimen Tersuspensi, dan Sedimen Dasar di Sungai Winongo, D.I.Yogyakarta

2021 ◽  
Vol 20 (1) ◽  
pp. 30-36
Author(s):  
Lintang Nur Fadlillah ◽  
Atikah Nian Indrastuti ◽  
Afanin Fatkha Azahra ◽  
Margaretha Widyastuti
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Atomic Absorption ◽  
River Water ◽  
Suspended Sediment ◽  
Atomic Absorption Spectrophotometry ◽  
Quality Analysis ◽  
Sediment Samples ◽  
Absorption Spectrophotometry ◽  
Pollution Status

Aktivitas manusia di sekitar Sungai Winongo dapat berdampak pada kontaminasi logam berat dari limpasan permukaan dan buangan langsung. Sifat toksik pada logam perlu diperhatikan karena dapat terakumulasi dalam waktu yang lama dan merusak lingkungan. Evaluasi logam berat dapat dilakukan dengan cara pemantauan kualitas air dan kualitas sedimen untuk mengetahui tingkat pencemaran suatu perairan karena logam berat dan distribusi logam berat itu sendiri. Penelitian ini bertujuan untuk mengetahui level toksik perairan dilakukan analisis hasil dengan berbagai indeks, yaitu Faktor Risiko Ekologis (Er) dan Indeks Beban Polusi (PLI). Sampel air, sampel sedimen tersuspensi (TSS), dan sedimen pada dasar permukaan diambil pada masing-masing titik untuk diuji laboratorium menggunakan alat AAS (Atomic Absorption Spectrophotometry). Hasil analisis menunjukkan bahwa logam Cu dan Cr paling banyak ditemukan pada sedimen dasar, sedangkan logam Pb paling banyak ditemukan terlarut dalam air. Logam pada sedimen tersuspensi ditemukan sangat kecil yaitu <0,031. Konsentrasi logam pada sedimen tersuspensi tertinggi adalah 0,043 mg/L pada titik T4.  Berdasarkan perhitungan Er dan PLI, potensi risiko ekologis terhadap logam di Sungai Winongo rendah (Er<40) dan tidak terdapat polusi karena logam berat (PLI<1). Namun, analisis kualitas air menunjukkan untuk nilai Cu dan Pb melebihi baku mutu kelas 2. Penelitian ini dapat dijadikan penelitian awal dalam kajian logam berat di Sungai Winongo secara historis.ABSTRACTThe Increase of human activities around the Winongo River can have an impact on decreasing water quality due to pollution from household and small industrial waste. Metal contamination in the aquatic environment is an environmental issue that needs attention due to its toxicity. Moreover, it can be accumulated in aquatic environments for a long time. Monitoring water quality and sediment quality is important to determine the distribution of heavy metals sources and the level of pollution in the waters. This research aims to determine the water toxicity level. An analysis of the results was carried out with various indices, which are the Ecological Risk (Er) and Pollution Load Index (PLI) in the water samples, suspended sediment samples (TSS), and sediment at the bottom of the surface will be taken at each point for laboratory testing using AAS (Atomic Absorption Spectrophotometry). The concentration of heavy metals for Cu and Cr in the surface sediment respectively was found higher than its concentration in the river water. Meanwhile, Pb contents are found higher in river water. The contents of heavy metals are found less in the suspended sediment samples. The Er and PLI shows low pollution risk and low pollution status, respectively. It indicates that the Code River was still in low pollution status for Cu, Cr, and Pb contamination. On the other hand, the water quality analysis results Cu and Pb over the Water Quality Standard for Class 2. This study may serve as a useful reference and baseline for heavy metals research in Winongo River historically.

Trace metal speciation in the Yamaska and St. François Rivers (Quebec)

1980 ◽  
Vol 17 (1) ◽  
pp. 90-105 ◽  
Author(s):  
A. Tessier ◽  
P. G. C. Campbell ◽  
M. Bisson
Keyword(s):  
Organic Matter ◽  
Trace Metals ◽  
Trace Metal ◽  
Suspended Sediment ◽  
Extraction Procedure ◽  
Municipal Sewage ◽  
Residual Fraction ◽  
Metal Concentrations ◽  
Sediment Samples ◽  
Mn Oxides

Water and suspended sediment samples were collected at 12 stations on the Yamaska and St. François Rivers, located in southeastern Quebec, and were analyzed for the trace metals Cd, Co, Cu, Ni, Pb, Zn, Fe, and Mn. The suspended sediment samples were subjected to a sequential extraction procedure designed to partition the particulate trace metals into five fractions: (1) exchangeable; (2) bound to carbonates; (3) bound to Fe–Mn oxides; (4) bound to organic matter; and (5) residual.Although suspended sediment levels as well as total soluble and particulate trace metal concentrations were highly variable in time and space, speciation patterns for each metal proved reasonably constant. Very small proportions of all metals, except Cd and Mn, were found in the exchangeable fraction, whereas high levels of all metals were present in the residual fraction; Fe–Mn oxides and organic matter constituted important transport phases for most metals. Deviations from this general behaviour were occasioned by man-induced perturbations (e.g., inputs of municipal sewage or mine waste water). At stations influenced by such factors, total particulate metal concentrations increased and the relative contribution of the residual fraction decreased. The trace metal content of fraction 3 proved to be particularly sensitive to anthropogenic inputs; other phases acting as trace metal sinks included those liberated in fractions 1 (Cd, Cu, Ni, Zn), 2(Cu, Ni, Zn), and 4(Cu, Ni).

scholarly journals Livestock and Small-Scale Irrigation Scheme Interactions as a Key Source for Sedimentation during the Irrigation Season: Four Case Studies from South-West Shoa, Ethiopia

2021 ◽  
Vol 13 (10) ◽  
pp. 5745
Author(s):  
Hanan Tadele Dessalegn ◽  
Alex Bolding ◽  
Charlotte de Fraiture ◽  
Mekonen Ayana
Keyword(s):  
Suspended Sediment ◽  
Overland Flow ◽  
Small Scale ◽  
Irrigation Season ◽  
Irrigation Scheme ◽  
Sediment Samples ◽  
South West ◽  
Canal Network ◽  
Small Scale Irrigation ◽  
Upstream Catchment

Small-scale irrigation (SSI) development can play a major role in Ethiopia’s economic development, but sedimentation is a major threat to its sustainability. The focus of the dominant discourse around the sedimentation of SSI schemes lies in upstream catchment protection during the rainy season, neglecting both protection against erosion through overland flow along the margins of the canal network and sedimentation caused by livestock disturbances. Remedies against the latter causes of sedimentation during the irrigation season have been ineffective due to erroneous assumptions regarding its cause. This study aimed to identify the sources and extent of sedimentation in SSI schemes. The accumulated sediment in the canal pre-irrigation season was measured from four SSI schemes and suspended sediment samples during irrigation season were collected from one SSI scheme. The accumulated sediment in the canal pre-irrigation season was measured from four SSI and suspended sediment samples during irrigation season were collected from one SSI scheme. The extent of sedimentation in the canals during the pre-irrigation season in relation to canal capacity was 100% of lined and unlined canals in abandoned, 68% in a lined, and 84% unlined canals in heavily sedimented and 38% in a lined and 46% of unlined canals lightly sedimented schemes. Livestock interactions with the SSI schemes were found to be the major sediment source before and during the irrigation, hence, attention should be given to integrating livestock as a part of the system.

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