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Uma Oya Hydropower Complex
The Uma Oya Hydropower Complex (also internally called Uma Oya Multipurpose Development Project or UOMDP) is a irrigation and hydroelectric complex currently under construction in the Badulla District of Sri Lanka. Early assessments of project dates back to 1989, when the first studies was conducted by the country's Central Engineering and Consultancy Bureau. The complex involves building a dam across Dalgolla Oya, and channelling water over a tunnel to Mathatilla Oya, both of which are tributaries of the Uma Oya. At Mathatilla Oya, another dam is constructed to channel of water per annum, via a headrace tunnel to the Uma Oya Power Station, where water then discharged to the Alikota Aru via a tailrace tunnel. The Alikota Aru is a tributary of the Kirindi Oya. The construction of the complex was inaugurated in April 2008 by former President Mahinda Rajapaksa and President Mahmoud Ahmadinejad. The total project cost is estimated to be approximately (approximately ), 85% of whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sri Lanka
Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, and southeast of the Arabian Sea; it is separated from the Indian subcontinent by the Gulf of Mannar and the Palk Strait. Sri Lanka shares a maritime border with India and Maldives. Sri Jayawardenepura Kotte is its legislative capital, and Colombo is its largest city and financial centre. Sri Lanka has a population of around 22 million (2020) and is a multinational state, home to diverse cultures, languages, and ethnicities. The Sinhalese are the majority of the nation's population. The Tamils, who are a large minority group, have also played an influential role in the island's history. Other long established groups include the Moors, the Burghers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Rivers
International Rivers is a non-profit, non-governmental, environmental, and human rights organization. Founded in 1985 by social and environmental activists, International Rivers works with policy and financial analysts, scientists, journalists, development specialists, and volunteers to combat the adverse effects of dams and their legacies in over 60 countries. The organization has staff in South Africa, Thailand, Brazil, China, India, and the United States, who have expertise in a range of issues and who use research, education, and advocacy to achieve the organization's mission. Overview The organization's stated aims are to protect rivers and defend the rights of communities that depend on them. It actively works against the development model with which dams are associated, which it believes to be unsustainable, and promotes alternative solutions for meeting water, energy, and flood-management needs. International Rivers is dedicated to giving dam-affected people the tools t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunnel Boring Machine
A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They may also be used for microtunneling. They can be designed to bore through hard rock, wet or dry soil, or sand. Tunnel diameters can range from (micro-TBMs) to to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs. TBMs can be designed to excavate non-circular tunnels, including u-shaped, horseshoe, square or rectangular tunnels. Tunnel boring machines are used as an alternative to drilling and blasting (D&B) methods in rock and conventional "hand mining" in soil. TBMs have the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in urban areas. The major disadvan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Headrace
A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or buckets arranged on the outside rim forming the driving car. Water wheels were still in commercial use well into the 20th century but they are no longer in common use. Uses included milling flour in gristmills, grinding wood into pulp for papermaking, hammering wrought iron, machining, ore crushing and pounding fibre for use in the manufacture of cloth. Some water wheels are fed by water from a mill pond, which is formed when a flowing stream is dammed. A channel for the water flowing to or from a water wheel is called a mill race. The race bringing water from the mill pond to the water wheel is a headrace; the one carrying water after it has left the wheel is commonly referred to as a tailrace. Waterwheels were used for various purposes from ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mean Sea Level
There are several kinds of mean in mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ..., especially in statistics. Each mean serves to summarize a given group of data, often to better understand the overall value (magnitude (mathematics), magnitude and sign (mathematics), sign) of a given data set. For a data set, the ''arithmetic mean'', also known as "arithmetic average", is a measure of central tendency of a finite set of numbers: specifically, the sum of the values divided by the number of values. The arithmetic mean of a set of numbers ''x''1, ''x''2, ..., x''n'' is typically denoted using an overhead bar, \bar. If the data set were based on a series of observations obtained by sampling (statistics), sampling from a statistical population, the arithmetic mean is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Island (Sri Lanka)
''The Island'' is a daily English-language newspaper in Sri Lanka. It is published by Upali Newspapers. A sister newspaper of ''Divaina'', ''The Island'' was established in 1981. Its Sunday edition, ''Sunday Island'', commenced publishing in 1991. The daily newspaper currently has a circulation of 70,000 and its Sunday edition, 103,000 per issue. Upali Wijewardene was its founder. Its political leaning is pro- Sri Lanka Freedom Party. See also *List of newspapers in Sri Lanka The List of newspapers in Sri Lanka lists every daily and non-daily news publication currently operating in Sri Lanka. The list includes information on whether it is distributed daily or non-daily, and who publishes it. For those newspapers that ar ... References External links * Daily newspapers published in Sri Lanka English-language newspapers published in Sri Lanka Publications established in 1981 Upali Newspapers {{SriLanka-newspaper-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity Dam
A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation to oppose the horizontal pressure of water pushing against it. Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Characteristics Gravity dams generally require stiff rock foundations of high bearing strength (slightly weathered to fresh), although in rare cases, they have been built on soil foundations. The bearing strength of the foundation limits the allowable position of the resultant force, influencing the overall stability. Also, the stiff nature of the gravity dam structure is unforgiving to differential foundation settlement, which can induce cracking of the dam structure. Gravity dams provide some advantages over embankment dams, the main advantage being that they can tolerate minor over-topping flows without damage, as the concre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roller-compacted Concrete
Roller-compacted concrete (RCC) or rolled concrete (rollcrete) is a special blend of concrete that has essentially the same ingredients as conventional concrete but in different ratios, and increasingly with partial substitution of fly ash for Portland cement. The partial substitution of fly ash for Portland Cement is an important aspect of RCC dam construction because the heat generated by fly ash hydration is significantly less than the heat generated by Portland Cement hydration. This in turn reduces the thermal loads on the dam and reduces the potential for thermal cracking to occur. RCC is a mix of cement/fly ash, water, sand, aggregate and common additives, but contains much less water. The produced mix is drier and essentially has no slump. RCC is placed in a manner similar to paving; the material is delivered by dump trucks or conveyors, spread by small bulldozers or specially modified asphalt pavers, and then compacted by vibratory rollers. In dam construction, roll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Sunday Leader
''The Sunday Leader'' was an English-language Sri Lankan weekly newspaper published by Leader Publications (Private) Limited. It was founded in 1994 and is published from Colombo. Its sister newspapers are the '' Iruresa'' ('' Irudina'') and the defunct '' The Morning Leader''. Founded by brothers Lasantha Wickrematunge and Lal Wickrematunge, the newspaper is known for its outspoken and controversial news coverage. The newspaper and its staff have been attacked and threatened several times and its founding editor Lasantha Wickrematunge was assassinated. History ''The Sunday Leader'' was founded in 1994 by brothers Lasantha Wickrematunge and Lal Wickrematunge with the first edition being published on 19 June 1994. The newspaper was associated with silent partner and leading politician and presidential candidate Gamini Dissanayake who was assassinated on 24 October 1994. ''The Sunday Leader'' was shut down by the Sri Lankan government on 22 May 2000 using the recently passed cens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of Power And Renewable Energy
The Ministry of Power and Energy ( si, විදුලිබල හා බලශක්ති අමාත්යාංශය; ta, மின்சக்தி மற்றும் வலுசக்தி அமைச்சு) is a cabinet ministry of the Government of Sri Lanka responsible for power and renewable energy. The ministry is responsible for formulating and implementing national policy on power and renewable energy and other subjects which come under its purview. , the current Minister of Power and Energy is Kanchana Wijesekera. The ministry's secretary is (Ms) Wasantha Perera. Ministers Secretaries See also *Electricity sector in Sri Lanka *India–Sri Lanka HVDC Interconnection *List of power stations in Sri Lanka References External links powermin.gov.lk {{authority control Power and Energy Sri Lanka Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
