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Non-revenue Water
Non revenue water (NRW) is water that has been produced and is "lost" before it reaches the customer. Losses can be real losses (through leaks, sometimes also referred to as physical losses) or apparent losses (for example through theft or metering inaccuracies). High levels of NRW are detrimental to the financial viability of water utilities, as well to the quality of water itself. NRW is typically measured as the volume of water "lost" as a share of net water produced. However, it is sometimes also expressed as the volume of water "lost" per km of water distribution network per day. Components and audits The International Water Association (IWA) has developed a detailed methodology to assess the various components of NRW. Accordingly, NRW has the following components: * Unbilled authorized consumption * Apparent losses ( water theft and metering inaccuracies) * Real losses (from transmission mains, storage facilities, distribution mains or service connections) In many utiliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water
Water (chemical formula ) is an Inorganic compound, inorganic, transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite not providing food energy, food, energy or organic micronutrients. Its chemical formula, H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is also the name of the liquid state of H2O at standard temperature and pressure. A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paranaguá
Paranaguá (''Great Round Sea'', in Tupi) is a city in the state of Paraná in Brazil. Founded in 1648, it is Paraná's oldest city. It is known for the Port of Paranaguá, which serves as both the sea link for Curitiba, to the west and the capital of Paraná, and as one of the largest ports of Brazil. As of 2020, the city has an estimated population of 156,174 and a population density of 169.92 persons per km², making it the tenth most populated city in the state of Paraná. The total area of the city is . Conservation The municipality contains 4% of the Guaratuba Environmental Protection Area, created in 1992. It holds 17% of the Bom Jesus Biological Reserve, a strictly protected conservation unit established in 2012. The municipality contains the Ilha do Mel State Park and the Ilha do Mel Ecological Station on the Ilha do Mel (Honey Island) at the mouth of Paranaguá Bay. History Early settlement Paranaguá was home to a ''sambaqui'', or midden culture, for se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Meter
Water metering is the practice of measuring water use. Water meters measure the volume of water used by residential and commercial building units that are supplied with water by a public water supply system. They are also used to determine flow through a particular portion of the system. In most of the world water meters are calibrated in cubic metres (m3) or litres, but in the United States and some other countries water meters are calibrated in cubic feet (ft.3) or US gallons on a mechanical or electronic register. Modern meters typically can display rate-of-flow in addition to total volume. Several types of water meters are in common use, and may be characterized by the flow measurement method, the type of end-user, the required flow rates, and accuracy requirements. In North America, standards for manufacturing water meters are set by the American Water Works Association. Outside of North America, most countries use ISO standards. Types of metering devices There are two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Supply
Water supply is the provision of water by public utilities, commercial organisations, community endeavors or by individuals, usually via a system of pumps and pipes. Public water supply systems are crucial to properly functioning societies. These systems are what supply drinking water to populations around the globe. Aspects of service quality include continuity of supply, water quality and water pressure. The institutional responsibility for water supply is arranged differently in different countries and regions (urban versus rural). It usually includes issues surrounding policy and regulation, service provision and standardization. The cost of supplying water consists, to a very large extent, of fixed costs (capital costs and personnel costs) and only to a small extent of variable costs that depend on the amount of water consumed (mainly energy and chemicals). Almost all service providers in the world charge tariffs to recover part of their costs. Water supply is a separate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UNEP
The United Nations Environment Programme (UNEP) is responsible for coordinating responses to environmental issues within the United Nations system. It was established by Maurice Strong, its first director, after the United Nations Conference on the Human Environment in Stockholm in June 1972. Its mandate is to provide leadership, deliver science and develop solutions on a wide range of issues, including climate change, the management of marine and terrestrial ecosystems, and green economic development. The organization also develops international environmental agreements; publishes and promotes environmental science and helps national governments achieve environmental targets. As a member of the United Nations Development Group, UNEP aims to help the world meet the 17 Sustainable Development Goals. UNEP hosts the secretariats of several multilateral environmental agreements and research bodies, including The Convention on Biological Diversity (CBD), The Minamata Convention on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Urban Water Conservation Council
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the most populated subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento is the state's capital, while Los Angeles is the most populous city in the state and the second most populous city in the country. San Francisco is the second most densely populated major city in the country. Los Angeles County is the country's most populous, while San Bernardino County is the largest county by area in the country. California borders Oregon to the north, Nevada and Arizona to the east, the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Supply And Sanitation In Chile
Water supply and sanitation in Chile were once considered efficient and equitable but have recently struggled to reliably provide water throughout the country. Chile's water resources have been strained by the Chilean water crisis, which was partially caused by a continuing mega drought that began in 2010, along with an increased demand for agricultural and other commercial interests. Chile began rationing water in April 2022. Chile's water and sanitation sector distinguishes itself in a few key ways. First, all urban water companies are privately owned or operated (the only exception is SMAPA), and water was defined as a private commodity in the 1980 Constitution of Chile. Second, the Chilean government instituted a subsidy for water costs in 1990 for citizens located in impoverished regions. Third, Chile became the first Latin American country to achieve 100% of its population using basic water sanitisation in 2016. This article is part of a series of articles comparing t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marginal Cost
In economics, the marginal cost is the change in the total cost that arises when the quantity produced is incremented, the cost of producing additional quantity. In some contexts, it refers to an increment of one unit of output, and in others it refers to the rate of change of total cost as output is increased by an infinitesimal amount. As Figure 1 shows, the marginal cost is measured in dollars per unit, whereas total cost is in dollars, and the marginal cost is the slope of the total cost, the rate at which it increases with output. Marginal cost is different from average cost, which is the total cost divided by the number of units produced. At each level of production and time period being considered, marginal cost includes all costs that vary with the level of production, whereas costs that do not vary with production are fixed. For example, the marginal cost of producing an automobile will include the costs of labor and parts needed for the additional automobile but not th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johor
Johor (; ), also spelled as Johore, is a state of Malaysia in the south of the Malay Peninsula. Johor has land borders with the Malaysian states of Pahang to the north and Malacca and Negeri Sembilan to the northwest. Johor shares maritime borders with Singapore to the south and Indonesia to both the west and east. Johor Bahru is the capital city and the economic centre of the state, Kota Iskandar is the seat of the state government, and Muar serves as the royal town of the state. The old state capital is Johor Lama. As of 2020, the state's population is 4.01 million, making it the second most populated state in Malaysia. Johor has highly diverse tropical rainforests and an equatorial climate. The state's mountain ranges form part of the Titiwangsa Range, which is part of the larger Tenasserim Range connected to Thailand and Myanmar, with Mount Ophir being the highest point in Johor. While its state capital, Johor Bahru, which is located within Iskandar Malaysia deve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tangiers
Tangier ( ; ; ar, طنجة, Ṭanja) is a city in northwestern Morocco. It is on the Moroccan coast at the western entrance to the Strait of Gibraltar, where the Mediterranean Sea meets the Atlantic Ocean off Cape Spartel. The town is the capital of the Tanger-Tetouan-Al Hoceima region, as well as the Ṭanja-Aẓila Prefecture of Morocco. Many civilisations and cultures have influenced the history of Tangier, starting from before the 10th centuryBCE. Between the period of being a strategic Berber town and then a Phoenician trading centre to Morocco's independence era around the 1950s, Tangier was a nexus for many cultures. In 1923, it was considered as having international status by foreign colonial powers and became a destination for many European and American diplomats, spies, bohemians, writers and businessmen. The city is undergoing rapid development and modernisation. Projects include tourism projects along the bay, a modern business district called Tangier City Cent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rabat
Rabat (, also , ; ar, الرِّبَاط, er-Ribât; ber, ⵕⵕⴱⴰⵟ, ṛṛbaṭ) is the capital city of Morocco and the country's seventh largest city with an urban population of approximately 580,000 (2014) and a metropolitan population of over 1.2 million. It is also the capital city of the Rabat-Salé-Kénitra administrative region. Rabat is located on the Atlantic Ocean at the mouth of the river Bou Regreg, opposite Salé, the city's main commuter town. Rabat was founded in the 12th century by Almohads. The city steadily grew but went into an extended period of decline following the collapse of the Almohads. In the 17th century Rabat became a haven for Barbary pirates. The French established a protectorate over Morocco in 1912 and made Rabat its administrative center. Morocco achieved independence in 1955 and Rabat became its capital. Rabat, Temara, and Salé form a conurbation of over 1.8 million people. Silt-related problems have diminished Rabat's role as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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