Sediment Monitoring Articles

  • Oysterville, Washington - Case Study

    Working in conjunction with Oregon State University coastal geomorphologist Nick Cohn, Dyacon installed an MS-140 weather station directly on the beach in Long Beach, Washington. The station was deployed for nine months as part of the Aeolian Sediment Transport and Coastal Dune Evolution project measuring sediment transport on the ocean floor, ...


    By Dyacon, Inc.

  • What are Characteristics of good core samplers?

    Perpendicular placement: The core sampler must make a vertical or straight entry into sediments to secure a reliably representative cross-section sample. Penetration: It must penetrate the sediments you expect to find and adaptable for many field situations. Core retention: There should be minimal loss of any part of the sample during return to the surface. Maximum sample ...

  • What are Core Samplers?

    A core, in marine research, is a cylindrical section taken from sediments underlying a water body. Core samplers, the instruments used to obtain cores, range from the simple to the complex. The variety of corer types reflect the breadth and variety of marine research. For example, the simplest corers are hand-operated types used in shallow waters to collect sediment cores containing fauna. ...

  • How do you clean up 375,000 m3 of contaminated river sediment every year? - Case Study

    Boskalis Environmental, Lower Fox River, USA, environmental remediation Did you know: Our membrane filter presses helped remediate more than 13 miles of contaminated riverbed in the Lower Fox River in Wisconsin, with each filter press capable of producing 18 tons of filter cake every hour.  Environmental ...

  • Live Webinar: OTT SVR 100 Radar Sensor - contact-free reliable and maintenance-free measurements

    The measurement of the velocity at the water surface is one of the oldest hydrometric measuring methods, time-tested and easy to carry out with the aid of surface floats. While float measurements are only temporarily applicable and often error-prone, modern radar sensors can determine the surface velocity in real time and with a very high measuring accuracy around the clock. ...


    By OTT HydroMet

  • Membrane filter presses at Lower Fox River, USA - Case Study

    Sustainable remediation Environmental remediation is always an ambitious task. And the case of the Lower Fox River remediation project in Wisconsin is no exception. To reduce risk to both human health and the environment, the project aims to remediate PCB-impacted sediments from a 21.4-km stretch of river through dredging, capping, sand separation, sediment dewatering, water treatment, ...

  • Why are we monitoring nutrients at different depths?

    Recently, LG Sonic introduced the MPC-Lab, an innovative monitoring buoy that can monitor algae, physico-chemical variables, and even nutrients such as nitrogen and phosphorus in near real-time and at different depths in a body of water. Combined with our other monitoring tools, this system offers a unique way to detect the spatial and temporal patterns of nutrient concentrations which play a ...


    By LG Sonic

  • Assessment of toxic metals in water and sediment of Pasur River in Bangladesh

    This study was conducted to assess the levels of toxic metals like arsenic (As), chromium (Cr), cadmium (Cd), and lead (Pb) in water and sediments of the Pasur River in Bangladesh. The ranges of Cr, As, Cd, Pb in water were 25.76–77.39, 2.76–16.73, 0.42–2.98 and 12.69–42.67 μg/L and in sediments were 20.67–83.70, 3.15–19.97, 0.39–3.17 and 7.34–55.32 mg/kg. The level of studied metals in water ...


    By IWA Publishing

  • eDNA Article Update

    In a recent article, we described how environmental DNA (eDNA) has been used to detect the presence of aquatic species in lakes and rivers.  eDNA studies have demonstrated great potential for surveillance of rare, endangered, and invasive species by simply collecting and analyzing water samples from target habitats.  Dr. Caren ...


    By Sterlitech Corporation

  • SWAT modeling of hydrology, sediment and nutrients from the Grand River, Ontario

    The Grand River watershed (GRW) is an important agricultural area in Southern Ontario. Land use has been modified by various human endeavors, altering hydrology and increasing export of sediment and nutrients. The objective of this study was to predict spatial and temporal patterns of hydrology, and export of sediment and nutrients from the GRW to Lake Erie using the Soil and Water Assessment ...


    By IWA Publishing

  • Scaling of nanofiltration membranes used for chromium(III) ions recovery from salt solutions

    The effect of membranes' structure on the efficiency of chromium(III) ions recovery from salt solution at low pH and the efficiency of chemical cleaning of these membranes were analyzed in this work. The nanofiltration membranes (DL and HL) used in this study were provided by GE Osmonics. The DL membrane had an irregular, dense support layer structure, while the HL membrane had a loose one. In ...


    By IWA Publishing

  • Experimental study of pollutant washoff on a full-scale street section physical model

    This study analyses the mobilization of total suspended solids (TSS) for different spatial distributions of sediment load located over the roadway surface of a full-scale street section physical model. At the sewer network outlet, flow discharges were measured and TSS pollutographs were determined with manual grab samples and inferred from turbidity records. In all the tests, the rain duration ...


    By IWA Publishing

  • Area-Velocity Flowmeter Installations in Denmark - Case Study

    Area-Velocity Flow Meters are designed to monitor flow rates in partially filled pipes and open channels without flumes or weirs. A sealed ultrasonic sensor is mounted on the bottom of the pipe or channel and connected to electronics through a watertight cable. The sensor measures both level and velocity and when calibrated with the pipe diameter or channel dimensions, the Greyline AVFM ...


    By Greyline Instruments Inc.

  • Quantitative Analysis of Geological Samples- X-Calibur

    Abstract Quantitative and qualitative analysis of geological samples (rocks and river sediments) was performed on Xenemetrix EDXRF Benchtop Spectrometer System, model X-Calibur  Objective: Perform XRF measurements on certified geological reference materials to build calibration curves for the major oxides (Na2O, MgO, SiO2, Al2O3, SiO2, P2O5, ...


    By Xenemetrix Ltd.

  • Velocity-based analysis of sediment incipient deposition in rigid boundary open channels

    Drainage systems must be designed in a way to minimize undesired problems such as decrease in hydraulic capacity of the channel, blockage and transport of pollutants due to deposition of sediment. Channel design considering self-cleansing criteria are used to solve the sedimentation problem. Incipient deposition is one of the non-deposition self-cleansing design criteria that can be used as a ...


    By IWA Publishing

  • Combined effects of nutrient enrichment and inorganic sedimentation on benthic biota in an experimental stream system

    Sedimentation and nutrient loading are among the most prevalent threats to fluvial ecosystem integrity. This study employed artificial streams (mesocosms) to simulate individual and combined impacts of nutrient enrichment and deposited fine sediment on benthic biota. Ninety-six circular mesocosms were used in a 21-day crossed experiment that measured the impact of three substrate compositions ...


    By IWA Publishing

  • Contamination levels and potential sources of organic pollution in an Asian river

    The Houjing River has long been an environmental victim of economic development. Industries that have settled along the bank of this river may have largely contributed to severe organic wastes pollution. This study collected water and sediment samples at various points along the river and measured concentrations of 61 volatile organic compounds (VOCs) and 128 semi-volatile organic compounds ...


    By IWA Publishing

  • The ecological risk assessment and suggestions on heavy metals in river sediments of Jinan

    The concentrations of eight heavy metals (Cr, Hg, As, Pb, Cd, Cu, Zn, Ni) in six river sediment samples were collected for evaluation of the degree of the heavy metals pollution distribution and ecological risk of three main rivers' sediments in Jinan. Multivariate statistical techniques were used to determine the most common pollution sources. The results illustrated that all of the metals in ...


    By IWA Publishing

  • Bed turbulent kinetic energy boundary conditions for trapping efficiency and spatial distribution of sediments in basins

    The purpose of this study is to develop and validate a numerical tool for evaluating the performance of a settling basin regarding the trapping of suspended matter. The Euler-Lagrange approach was chosen to model the flow and sediment transport. The numerical model developed relies on the open source library OpenFOAM®, enhanced with new particle/wall interaction conditions to limit sediment ...


    By IWA Publishing

  • Great Lakes restoration is under threat. Here’s why that matters

    Degraded by decades of pollution, the North American Great Lakes are finding new life through cleanup efforts now threatened by proposed federal budget cuts. The St. Louis River, which flows into Lake Superior — the greatest of North America’s Great Lakes — has a long and turbulent history. Once a portal for Native American trade and a garden for wild ...


    By Ensia

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