water level indicator Articles

  • Water Treatment Optimization - Case Study

    Drinking water treatment in North America has stringent requirements for effluent water quality, with a great amount of attention being drawn to the presence of hazardous disinfection by-products (DBPs) persisting through water distribution systems. The operation of water treatment plants involves addition of various mixing agents to help with coagulation and settling of organics in the raw water ...


    By MANTECH

  • Measuring CO2 to Optimise the Bulk Storage of Food

    Meeting the food requirements of a growing global population is becoming increasingly difficult. Despite the need for additional food, it is estimated that 50-60% of grain is lost after harvesting, at a cost of about $1 trillion per year.1 One of the major reasons for lost grain is spoilage due to mould or insect infestation during storage.2 To provide a ...


    By Edinburgh Instruments Ltd

  • A quick guide to oil analysis for engine test applications

    Reliability testing is a very important component of new engine development. Engineers need to fully understand and chart the engine lifetime performance under a variety of conditions before mass production may be considered. Many important performance data parameters are collected in real time through the many different types of sensors that are connected to the engine in the test cell and oil ...


    By Spectro Scientific

  • LIT25 level indicating transmitter controls swimming pool level

    The Town of Okotoks, Alberta I never gave it much thought, but what happens to the displaced water when a hundred people jump into a large public swimming pool? It goes into a surge tank - of course. This Greyline LIT25 Level Indicating Transmitter with ultrasonic sensor is installed in the basement of the Okotoks Recreation Centre in Alberta, Canada. The LIT's 4-20mA output is connected to a ...


    By Greyline Instruments Inc.

  • Evolution of sustainable water resources indicators

    ABSTRACTThe Sustainable Water Resources Roundtable (SWRR) is one of several natural resource roundtables with government, corporate, and NGO participation. SWRR has been a subgroup of the Advisory Committee on Water Information (ACWI) since 2001, and operates under authority of OMB M-92-01 and the Federal Advisory Committee Act. The purpose of the Roundtable is to provide an open forum for ...

  • Performance indicators for water supply management

    In the present study specific performance indicators are proposed that express the level of service of a water system subjected to varying operating conditions over time. The proposed methodology has been applied to a specific case study (Sinni water supply system in Basilicata – Italy) to demonstrate the real applicability of the proposed performance analysis that could be very useful to ...


    By IWA Publishing

  • Indicators of Pollution Management

    'The definition and selection of environmental performance indicators is still at an early stage but the use of indicators is increasing, both for the tracking of trends in pollution and other environmental issues at a large scale (national or regional) and also for the monitoring of Bank projects. This note provides a framework to assist in the selection of appropriate indicators for pollution ...


  • Using LC50 for metals as Water Quality indicator

    One of the causes of low yields or productive deficiencies, in the stage of production of fresh water, more gifts in the aquaculture industry of salmon in Chile, has its origin in the presence of naturally occurring metals, both in bodies of fresh water as in deep wells. The toxicity of metals such as Aluminum and Copper, others, has been described previously and their presence in waters of our ...


    By Aquaknowledge

  • Oral exposure to industrial effluent with exceptionally high levels of drugs does not indicate acute toxic effects in rats

    The Patancheru area near Hyderabad in India is recognized as a key link in the global supply chain for many bulk drugs. A central treatment plant receives wastewater from approximately 90 different manufacturers, and the resulting complex effluent has contaminated surface, ground, and drinking water in the region. Ecotoxicological testing of the effluent has shown adverse effects for several ...


    By John Wiley & Sons, Ltd.

  • Looking beyond headline indicators: water and sanitation services in small towns in Ethiopia

    This paper presents findings on water and sanitation service levels from 16 small and medium towns in four regions of Ethiopia. In these settlements, the proportion of people with access to improved water and sanitation services is found to be high and consistent with other major datasets and reports for urban Ethiopia. However, when service characteristics such as reliability, quality, ...


    By IWA Publishing

  • Exploring water indices and associated parameters: a case study approach

    In the past 20 years, over 50 water indices have been developed to characterize human-water systems within the frameworks of water scarcity, water poverty, water vulnerability, and water security. This study compares existing water indices in Bangladesh and Sri Lanka to better understand which parameters (or lack thereof) contribute to the usefulness of water indices. Drawing on knowledge about ...


    By IWA Publishing

  • Towards The Application of Specific Exergy as an Integrated Indicator For Transitional And Coastal Waters

    Ecological indicators are used increasingly to assess the health condition of ecosystems. However, the vast majority of indicators are based on a particular species or components, for example: phytoplankton, zooplankton, macrophyes, macrobenthos, etc. Even though such indicators have provided useful indications on ecosystem status, they are not broad enough to reflect the real complexity of ...


  • Pesticide Impact Rating Index – A Pesticide Risk Indicator for Water Quality

    Pesticide users, natural resource managers, regulators, government agencies and many others are concerned about the off-site impact of pesticides on the environment. Systematic methods of the assessment of potential risk of pesticides to environmental components can serve as valuable tools in decision making and policy formulation. Simple risk indicators have been developed which cover a range of ...


    By Springer

  • Pesticide Impact Rating Index - A Pesticide Risk Indicator for Water Quality

    Pesticide users, natural resource managers, regulators, government agencies and many others are concerned about the off-site impact of pesticides on the environment. Systematic methods of the assessment of potential risk of pesticides to environmental components can serve as valuable tools in decision making and policy formulation. Simple risk indicators have been developed which cover a range of ...


    By Springer

  • Determination of diurnal water level fluctuations in headwaters

    The aim of this paper is to study diurnal fluctuations of the water level in streams draining headwaters and to identify the controlling factors. The fieldwork was carried out in the Gryżynka River catchment, western Poland. The water levels of three streams draining into the headwaters via a group of springs were monitored in the years 2011–2014. Changes in the water pressure and water ...


    By IWA Publishing

  • Adaptative methodology of sustainability indicators management by ontology

    The growth of many sectors in modern society has increased the degradation of the environment. Consequently, it generates great ecological unbalance, enhancing the importance of sustainable development, since it stimulates productivity, job and income creation, while reduces the rates of deforestation, erosion and water and soil pollution. In this context, sustainability indicators can be useful ...


    By Inderscience Publishers

  • Introducing pressure and number of connections into water loss indicators for French drinking water supply networks

    In France, the system of performance indicators defined within the relevant regulations does not include indicators relating to pressure, or the number of connections. So, Irstea and Veolia Water decided to create a new system of water loss indicators designed for use in France and that would take into account these parameters. The study was initially carried out at District Metered Area (DMA) ...


    By IWA Publishing

  • Eco-economy indicator: past decade the hottest on record

    The first decade of the twenty-first century was the hottest since recordkeeping began in 1880. With an average global temperature of 14.52 degrees Celsius (58.1 degrees Fahrenheit), this decade was 0.2 degrees Celsius (0.36 degrees Fahrenheit) warmer than any previous decade. The year 2005 was the hottest on record, while 2007 and 2009 tied for second hottest. In fact, 9 of the 10 warmest years ...


    By Earth Policy Institute

  • Water quality characteristics of Poyang Lake, China, in response to changes in the water level

    As one of the few remaining lakes that are freely connected with the Yangtze River, Poyang Lake exhibits large annual water level (WL) fluctuations. In this study, weekly samples were collected at the north end of Poyang Lake from September 2011 to December 2012, and we investigated the mechanism of limnological responses to fluctuations in the WL. The study covers three seasons that were ...


    By IWA Publishing

  • Bi-level optimization allocation model of water resources for different water industries

    There are severe water shortages, exacerbated by overexploitation, in the region upstream of the dam at Zhang Jiakou, and in many other regions, both in China and other parts of the world. Allocating water resources equitably amongst the numerous domestic and industrial consumers in these regions, while preserving or improving the environment and meeting economic goals, is a highly complex ...


    By IWA Publishing

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