liquid-level indicator Articles

  • A review on sludge dewatering indices

    Dewatering of sludge from sewage treatment plants is proving to be a significant challenge due to the large amounts of residual sludges generated annually. In recent years, research and development have focused on improving the dewatering process in order to reduce subsequent costs of sludge management and transport. To achieve this goal, it is necessary to establish reliable indices that ...


    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 ...


  • Digest of EEA indicators 2014

    Environmental indicators are essential tools for assessing environmental trends, tracking progress against objectives and targets, evaluating the effectiveness of policies and communicating complex phenomena to non-technical audiences. The last guide to European Environment Agency (EEA) indicators, published in 2005, focused on the Core Set of Indicators (CSI) (EEA, 2005). Since then, the EEA has ...

  • Environmental indicator report 2012

    Environmental challenges are intrinsically linked with the way we live: we depend on our natural environment to supply the natural resources and ecosystem services that sustain our health and well-being, and ensure that our economies prosper. Many of the environmental problems that we face today have existed for decades; what has changed is our appreciation of their drivers and the impacts these ...

  • Environmental indicator report 2014

    Across the world, there is growing recognition that the prevailing model of economic growth, grounded in ever-increasing resource use and pollutant emissions, cannot be sustained indefinitely. In the coming decades, with global population expected to increase to 9 billion people from 7.6 billion today, continued improvements in living standards and well-being will depend on a transition to a ...

  • LIT25 level indicating transmitter controls swimming pool level - Case Study

    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.

  • The development of indicators and core indicators for sustainable development: a state of the art review

    Experience with the establishment of indicators for sustainable development shows that it is scientifically feasible, most useful for communication with the public and a necessary navigation instrument to establish measures pertaining to the sustainability process objective. Usually, long lists of indicators were established to describe the complexity of sustainable development. More recently, ...


    By Inderscience Publishers

  • 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

  • What are the main indicators of water quality?

    “Water is the driving force of all nature;” so said Leonardo da Vinci. The survival of our planet depends on the availability of water and the condition that it is in. It is therefore vital to make sure that it is able to provide a hospitable environment for those that live in it, and is free from harmful levels of substances for those that drink it. Not ...


    By Aquaread Limited

  • Sustainability indicators: is there consensus among stakeholders?

    Measuring regional sustainability must include local approaches, as sustainability will be determined by what the community values and the relative importance of these values will depend on community expectations, which vary. One of the biggest challenges for introducing strategies for sustainability is that multiple stakeholders are involved and they have differing objectives. This paper reports ...


    By Inderscience Publishers

  • Economic sustainability of the economy: concepts and indicators

    Every society can be described as comprising four dimensions, the economic, social, environmental and institutional. Each of them is a complex, dynamic, self-organising and evolving entity in its own right, making the coupled system one of tremendous complexity. For this system to be sustainable, each of the four subsystems has to maintain its capability to survive and evolve, while the ...


    By Inderscience Publishers

  • 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 to Assess Sustainability of Transport Activities

    Transport is a priority action area for sustainable development. It plays a considerable role in the economy with its omnipresence throughout the production chain, at all geographic scales (Rodrigue et al., 2007). However, transport is also considered to be the sector with the fastest growth in environmental pollution (EC, 2005). Apart from energy generation and industrial processing, transport ...


  • Kerbside Recycling: Indicative costs and performance

    The increase in national recycling rates achieved by local authorities since the publication of Waste Strategy 2000 has been impressive. The growth from 7% to 31% in 2006/07 has been achieved through a mixture of investment and ingenuity, but it has resulted in the creation of a number of different collection systems with many local variations. Although opinions about the merits of the different ...

  • 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

  • Indicators For The Assessment of Thresholds And Points of Non-Return

    Ecological indicators are used increasingly to assess the conditions and/or status of ecosystems. Historically, the first approach was to develop indices based on a particular species or components, e.g. macrophytes, zooplankton, etc. In general, such indices are not broad enough to reflect the complexity of the ecosystem, as they do not include information at the structural, functional and ...


  • Comparison of sustainability indices applied to the electrical sector in Brazil

    This article draws a research on the combination of indicators of efficiency in the management of sustainability by enterprises. The concept of sustainability and the identification of the dimensions of this concept are also object of examination. Analyses performed employing two different tools, data envelopment analysis (DEA) and composition of probabilistic preferences (CPP), are compared. The ...


    By Inderscience Publishers

  • New Energy Indicators for Transport: The Way Forward

    The IEA Energy Technology and R&D Office, and the International Transport Forum (ITF) held a joint workshop on New Energy Indicators for Transport: The Way Forward, 28-29 January 2008. This two-day workshop examined the quality and coverage of energy-related transportation indicators and data currently available from national governments and other sources around the world. A primary objective ...


    By International Energy Agency

  • Integrating sustainable development indicators with existing business infrastructure

    This paper presents a model for the integration of Sustainable Development Indicators (SDIs) with existing business infrastructure at a major Canadian electric utility. The model was developed based on extensive consultations with 16 internal experts at the utility and ten external experts in sustainable development. It considers the integration of the indicators at the case company's ...


    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

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