hydrometer Articles

  • Case study - Remote water quality monitoring in South Africa

    Situated in the Mpumalanga province of South Africa, the Xstrata Coal South Africa (XCSA) runs several open cut and underground mining operations producing thermal coal. To ensure their mining operations do not affect the surrounding natural water bodies, the company employs Hydrolab and OTT water quality monitoring equipment with remote data transmission options: the OTT ecoLog 800 water level ...

  • A Comparison of Methods to Determine the Particle Size

    There currently exist a multitude of techniques to determine particle size distributions. However, in assessing the particle size distribution (PSD) of solids in a stormwater sample, the number of suitable techniques is considerably reduced due to the limited quantity of solids in a typical stormwater sample. The electrical sensing zone method (ESZ), which utilizes the Coulter Principle, and ...


  • Case study - Buoy-based temperature profiling in the Bavarian Lakes

    In summertime a temperature stratification occurs in deep lakes – the surface water is warm, but deep down the water is cold.  This has considerable influence on the nutrient balance and the biological habitat in these lakes. Due to generally higher air temperatures induced by the climate change, both change and have effects on the life conditions of the ecosystems in the lakes. ...

  • Piedroba Dewaters Slurry, Returns Clean Water to Holmes Beach Canals

    This project was a successful application of a total cleaning system (TCS), where the particular type of solids of the sediments permitted the dredger to avoid the costly construction of a dredged material maintenance area (DMMA), or the transportation and tipping fees for a municipal landfill. The surface waters were cleaned in tandem, and contributed to a higher quality benthic environment in ...

  • Case study - Dam monitoring in South Africa

    The purpose of the Komati River Basin Development Project is to ensure the availability of water in order to promote economic development in the region. OTT’s part of the project was to supply dataloggers for the monitoring of the river flows into and out of the Maguga and the Driekoppies dams. The technical needs were high-level: Technology designed specifically for environmental ...

  • Case study - Well monitoring for a water supplier

    The municipality company, in city of Luebek, Germany, provides potable water for approximately 120,000 households, all pumped from more than 30 wells.  These wells have water levels as deep as 160 meters.  The water levels of these groundwater wells must be measured with the highest possible accuracy.  Previously, the pressure probe's analogue output signals (4…20mA) that ...

  • Case study - Water quality monitoring and weather data at Pampulha Lake-Brasil

    In 2010, OTT Hydromet's partner in Brasil,  Hexis began working with CETEC. This resulted in the installation of a buoy, equipped with an automatic profiling system, in early 2013. The project’s objective is the continuous monitoring of the lake’s water quality, with focus on improving this by the 2014 World Cup Games.  Adcon, Lufft and OTT technologies (Hydrolab DS5X ...

  • Case study - Ireland Groundwater Monitoring Program

    To fulfill the EU Water Framework Directive (WFD) requirements, a groundwater monitoring program was established by the Environmental Protection Agency of Ireland. This program focuses on providing information to assess the environmental status of surface and groundwater bodies. Read about the program and the example installation in the Bog of the Ring. Technology Used: OTT Orpheus Mini, OTT ...

  • OTT RLS Radar Level Sensors Help Optimize South Dakota TMDL Monitoring

    Non-contact OTT RLS Radar Level Sensors using accurate pulse radar technology are helping the South Dakota Department of Environment & Natural Resources more efficiently monitor water levels at current and future statewide Water Quality Monitoring ...

  • Case study - Flood water protection in the city of Buenos Aires

    The Arroyo Mendrano is the second largest channeled stream of water running through Buenos Aires. In case of heavy rainfalls it overflows its banks and causes considerable material damage. When the retention basin which had been especially built to collect large quantities of water during strong precipitation events also overflowed, the government decided to have an alarm-system installed to ...

  • Case study - All-weather meteorological stations in the Carpathian Mountains - Hungary

    For a development project on the Hungarian hydrometrical network operated by the Hungarian Meteorological Service (OMSZ), 141 new meteorological measuring stations were installed across the country. The all-weater climate stations have to provide reliable and accurate data in all climate conditions, especially in the Carpathian Basin, where climate varies widely. The average annual precipitation ...

  • Case study - Precipitation measurement in high mountains - Aosta Valley

    Precipitation monitoring in remote areas without infrastructure was thought to be impossible in Aosta Valley, Italy. All the more challenging was the task to install a measuring site on the Peak CIMO Blanche with its height of 3000 meters (just shy of 10,000 feet), located near the famous Matterhorn.  The measuring site needed to withstand the extreme weather conditions that comes with ...

  • Case study - Harris county flood warning system

    The Harris County Flood Control District in Texas was created in 1937 as a response to the devastating floods that struck the region between 1929 and 1935. The District's boundaries protect 3.7 million people and include the city of Houston. Twenty-two different watersheds are included in the district's boundaries, each with a unique set of monitoring challenges. The District is using the "Flood ...

  • Case study - Flood warning station at Kriebstein, Saxony - Germany

    As flood-warning station and hydrometric base station with a catchment basin of 1754 km2 , reliable data monitoring is extremely important for the hydrological balance of Freiberg and for the whole area around the Mulde. The power plants, located up and down stream of this gauging station, influence the water level and water flow surrounding it.  As a solution for measuring the discharge, ...

  • Case study - Weather stations for the 2014 Winter Olympic Games in Sochi

    For real-time meteorological data at the XXII Winter Olympic and XI Winter Paralympic Games in Sochi from February–March 2014, 29 specialized automatic meteorological stations (AMS) were installed in the areas close to the Olympic sport venues from 2010-2013.  This was in addition to the regular observation network that provided data for the weather now-casting system supplied and ...

  • Case study - Continuous discharge monitoring in Mecklenburg - Germany

    The Wallensteingraben was originally constructed as a channel and is almost 20 km long. In the context of implementing the European Water Framework Directive, goals include improving ecological passability. At the same time a measurement site for the continuous monitoring of discharge quantities was installed.  Products used include OTT SLD, OTT CBS and OTT LogoSens. Monitoring ...

  • Case study - Precipitation monitoring in the Sierra Nevada - Spain

    This OTT Pluvio² precipitation measuring station “Tajos de Breca” is situated 2470 meters (8103.67 feet) above sea level at the southern slope of the Sierra Nevada for long term meteorological data collection. The station forms part of a measuring network named “Project Guadalfeo” which is financed by the Andalusian government and the responsible water authority. ...

  • Online discharge measurement with OTT SLD

    Background For the economic management of the waterways between Elbe and Oder it is essential to know the discharge of these rivers at defined locks. The authority for water and navigation (WSA) in Lauenburg operates hydrological stations for the measurement of water level and discharge to effectively regulate the water flow at the locks in Plau and Malliß ...

  • Case study - New monitoring network for Scottish ports

    In the past, the ferries operating off the west coast of Scotland would have to sail to port to assess weather and tidal conditions would allow them to berth alongside the pier.  In efforts to save time, fuel and costs, the Caledonian Maritime Assets Limited (CMAL), which owns many of the ferries, ports and harbors in the region, decided to install 15  tide and weather stations, using ...

  • Case study - Reservoir Aabach Germany - Continuous monitoring of contact pressure

    With a total volume of approximately 20 million cubic meters of water and a length of 450 meters, the reservoir supplies drinking water for 200.000 people in the area and fulfils also an important  function in the flood protection there. With the new monitoring solution it was possible to reduce the workload and cost for collecting, reading out and transmitting of data significantly. An ...

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