suspended sediment Articles
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Continuous simulation of suspended sediment through a stream section
This paper presents the development of a one–dimensional stream water quality model for the continuous simulation of suspended sediment transport and deposition processes along a particular stream section. The model integrates stream hydraulics and suspended sediment transport and deposition processes. The stream hydraulic model was developed using the Muskingum–Cunge method of channel routing. ...
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Numerical prediction of suspended sediment concentrations in the Ariake Sea, Japan, using a time-dependent sediment resuspension and deposition model
The Ariake Sea, a typical semi-closed bay located in Kyushu Island, western Japan, has a maximum tidal range of 6 m in spring tide, and its vast tidal flats are composed of both sandy bottom areas and muddy bottom areas. In this study, two-dimensional depth-averaged finite difference numerical models have been developed for predicting the tidal flow velocity and suspended sediment concentration ...
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Sauter mean diameter determination for the fine fraction of suspended sediments using a LISST-25X diffractometer
ABSTRACT The L1SST-25X ability for measuring the Sauter mean diameter of the fine fraction of sediment samples, SMD/. is evaluated. A simple algorithm to determine the SMDf is proposed. The algorithm is based on the standard output variables from the L1SST-25X diffractome-ter Sauter mean diameter of the complete sample, SMD(; Sauter mean diameter of the coarse fraction,SMDg; total suspended ...
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Comparative evaluation with the analytical hierarchy procedure of the Kalinske, Brooks, and Toffaleti equations used to estimate suspended–sediment discharges in rivers
This paper presents a comparative analysis of the application of the analytical hierarchy process (AHP) to determine the reliability of three equations used estimate suspended–sediment discharges at the Armand River in Iran. The AHP procedure was utilised to compare the discharges of suspended sediments measured at a station on the Armand River with results calculated with the equations derived ...
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Faecal coliform attachment to settleable suspended sediments in fresh surface waters: linear partition model validation and sediment concentration effects
Controlled experiments were conducted to examine the validity of the linear partition model for faecal coliform (FC) attachment to suspended sediments and assess the impact of sediment concentration on the attachment. Sediments were collected from a river in Beijing, China and the suspended particles <62 μm were separated out and mixed with FC suspensions. The experimental mass ...
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Ultrasonic treatment for quantification of bioavailable phosphorus in soils and suspended sediments
Several bioassays and chemical extraction methods have been proposed to quantify bioavailable phosphorus (BAP), but procedural and theoretical limitations have hindered their use. In this paper, we developed a method for P extraction from agricultural soil and suspended sediment by combining ultrasonic treatment with extraction by 0.1 molL−1 NaOH solution. The extraction process is less ...
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Development of a water quality tank model classified by land use for nitrogen load reduction scenarios
The Ariake Sea, a typical semi-closed bay located in Kyushu Island, western Japan, has a maximum tidal range of 6 m in spring tide, and its vast tidal flats are composed of both sandy bottom areas and muddy bottom areas. In this study, two-dimensional depth-averaged finite difference numerical models have been developed for predicting the tidal flow velocity and suspended sediment concentration ...
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Assessment of suspended sediment concentration and load from a large Himalayan glacier
An assessment of suspended sediment concentration (SSC), load, yield and erosion rate has been undertaken for the Gangotri Glacier drainage basin (nearly 50% glaciated) located in the Garhwal Himalayas. Data were collected for four ablation seasons (2008–2011). Mean monthly SSCs, for May, June, July, August and September during the study period was 1,011, 1,384, 1,916, 1,675 and ...
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The pollution source assessment tool for Sydney's drinking water catchments
WaterNSW funds a range of interventions to minimise pollution within the drinking water catchments of Sydney. To assist with the process of targeting this expenditure, WaterNSW has developed a spatial analysis tool, known as the Pollution Source Assessment Tool (PSAT), which uses a hybrid of multi-criteria analysis and load-based methods to highlight high pollution potential sites and ...
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Review of reservoir sediment inflow estimate methodology: a case study of Malaysian River
The purpose of this investigation is to summarise the current standard of practices for estimating reservoir sediment inflows for the entire duration of their useful service life, normally 100-year ARI design period. To achieve this objective, a review of the past and contemporary literatures and conventions on sedimentation issues in Malaysia as well as other regional countries is imperative. A ...
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Estimating quantiles of annual maximum suspended sediment load in the tributaries of the Lower Mekong River
Sediment is an important factor involved in sustainable development of water resources systems. Suspended sediment is a major portion of total load transported by streams. Quantification of annual maximum suspended sediment load (SSLm) and its quantiles (SSLm*) is the basic requirement for planning, design and management of hydraulic structures and water resources-related projects. Less ...
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Sediment load prediction by combined fuzzy logic-wavelet method
Sediment load prediction is very important in planning, operation, and maintenance of water structures located on rivers. The sediment loads exhibit random characteristics due to the uncertain nature of sediment transportation in rivers. To predict suspended sediment load, stochastic processes, regression methods, neural network models, and fuzzy logic have been used in the literature so far. ...
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A sensor for measuring erosion and deposition
Introduction The processes of sediment transport and deposition entail questions of the frequency of transport, the threshold of transport, the migration ofbedforms, and the sedimentation and resuspension of sediments carried in suspension. The study of these processes demands the simultaneous monitoring of the process agencies, i.e., the current and the waves, and the response at the ...
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Rapid settling of nanoparticles due to heteroaggregation with suspended sediment
Sedimentation of engineered nanoparticles (ENPs) has been studied mainly in artificial media and stagnant systems mimicking natural waters. This neglects the role of turbulence and heteroaggregation with sediment. We studied the apparent sedimentation rates of selected ENPs (CeO2, PVP‐Ag and SiO2‐Ag) in agitated sediment‐water systems resembling fresh, estuarine and marine waters. Experiments ...
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Assessment of several nonlinear methods in forecasting suspended sediment concentration in streams
In this paper, the use of nonlinear nearest trajectory based on phase space reconstruction along with several data-driven methods, including two types of perceptron artificial neural networks with Levenberg–Marquardt (ANN-LM) and particle swarm optimization learning algorithms (ANN-PSO), adaptive neuro-fuzzy inference system (ANFIS) and gene expression programming for forecasting suspended ...
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Comparison of phosphorus fraction distribution and influencing factors of suspended and surface sediments in the Tiaoxi watershed, China
Suspended and surface sediments from the Tiaoxi watershed, fed by the Xitiaoxi and Dongtiaoxi rivers, were analyzed for total phosphorus (TP) and the inorganic P fractions of loosely adsorbed P that were extractable with NH4Cl (NH4Cl-P), reductant P (BD-P), metal oxide-bound P extractable with NaOH (NaOH-P), and calcium-bound, HCl-extractable P (HCl-P), while other physicochemical ...
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Self-purification process and retention of nitrogen in floodplains of River Nemunas
Due to its catchment size and its significant level of agricultural pollution, the Nemunas river basin has been identified as an agricultural hot spot in the Baltic Sea basin. On average, the total annual inorganic nitrogen runoff into the river is 26.9 × 106 kg, which corresponds to a load of 275 kg km−2 yr−1. A submerged floodplain, covering 605 km2 of the River Nemunas lowland, maintains the ...
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Bioaccumulation of hydrophobic organic chemicals by aquatic organisms: a workshop summary
Traditionally, regulatory approaches to the bioaccumulation of hydrophobic organic chemicals (HOCs) have emphasized the direct accumulation of these chemicals from solution across biological membranes, leading to the development of the bioconcentration factor as a measure of direct uptake of freely dissolved HOCs. However, an often larger fraction of the total amount of many HOCs in the water ...
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Soil Erosion Research - University of Zambia - Case Study
Description: A SediMeter was deployed in this water reservoir in order to collect data on the timing and amount of sedimentation in the water reservoir. Traditional methods include repeat measurements of the bed level, and taking of sediment cores, but they only allow the measurements of the net change between measurements, and are unable to register what exactly happens, and when it happens. In ...
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Light scattering by random shaped particles and consequences on measuring suspended sediments by laser diffraction
We present new observational data on small-angle light scattering properties of natural, random shaped particles, as contrasted with spherical particles. The interest in this "shape effect" on scattering arises from the need for a suitable kernel matrix for use in the laser diffraction method (LD) of particle sizing. LD is now used broadly for measuring size distribution of suspended marine ...
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