water level indicator Articles

  • 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.

  • 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

  • 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 ...

  • 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 ...


  • Differential effects of low humidity levels on butterhead quality indices related to external, middle and internal lettuce sections

    Leaf water status evolution during greenhouse butterhead lettuce storage under adverse humidity conditions was evaluated. The relationships between water status and the chlorophyll content and overall visual quality (OVQ) were analysed. Parameters were evaluated in external, middle and internal sections of the lettuce heads. Indices showed different behaviour in different sections. There was a ...


    By Inderscience Publishers

  • 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

  • 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 ...


  • 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

  • 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

  • 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

  • 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

  • Assessing sanitation service levels

    Conventional sanitation ladders rank sanitation in increasing complexity of technological options. However, sanitation improvement is not as straightforward as the concept of “a ladder” with incremental improvements, might suggest. For example, from the user perspective, a VIP toilet may in some circumstances be a better option than a septic tank system. There is a wide gap between ...


    By IWA Publishing

  • Sewer Level Monitoring - Photos

    Sewer Level Monitoring - Photos Photos in this article present the complexity and versatility of sewer level monitoring. When examining the photos, pay special attention to the stand-alone autonomous characteristics of each installation. In lack of any cabling from the outside, whether data cables or power cables, the solution is fed from its own battery power supply. Data is tranmitted ...

  • 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

  • Are current phosphorus risk indicators useful to predict the quality of surface waters in Southern Manitoba, Canada?

    Received for publication April 6, 2008. Many phosphorus (P) risk indicators have been developed to assess the risk of P loss from agricultural land to surface water. Most of these indicators are designed for land and climates where rainfall-induced erosion of particulate P from sloping landscapes is the main process of P transport. No indicators have been validated in the Canadian Prairies, where ...

  • Elimination of enteric indicators and pathogenic bacteria in secondary effluents and lake water by solar disinfection (SODIS)

    The reduction of enteric indicators (fecal coliforms (FC) and Enterococcus faecalis) and elimination of pathogenic bacteria (Salmonella spp. and Staphylococcus aureus) in the secondary effluents and lake water by solar disinfection (SODIS) was studied in this article. FC, E. faecalis, Salmonella spp. and ...


    By IWA Publishing

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