|
Ice Blasting
Ice blasting is the use of explosives to break up ice in rivers, aiding navigation and preventing flooding. This is done during the spring when snow is melting and river ice is breaking up. There is always a chance that the ice flows could collide creating an ice jam and blocking the river. The river, filled with melt water, will quickly flood and often cause damage to nearby settlements. Thus in most northern areas governments quickly act to break up the ice jams before they can do much damage. This is most easily done with explosives. These explosives may be planted from the shore, or in some cases by helicopter. Explosives can also be remotely delivered by artillery or dropped by bombers. In the large rivers of the Siberia the Russian airforce is sometimes called in to bomb ice jams. Some districts, where flooding is especially common, do preemptive ice blasting. The city of Ottawa, Ottawa, Ontario, Canada, for instance, blasts the Rideau River each spring to break up the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Blasting
Ice blasting is the use of explosives to break up ice in rivers, aiding navigation and preventing flooding. This is done during the spring when snow is melting and river ice is breaking up. There is always a chance that the ice flows could collide creating an ice jam and blocking the river. The river, filled with melt water, will quickly flood and often cause damage to nearby settlements. Thus in most northern areas governments quickly act to break up the ice jams before they can do much damage. This is most easily done with explosives. These explosives may be planted from the shore, or in some cases by helicopter. Explosives can also be remotely delivered by artillery or dropped by bombers. In the large rivers of the Siberia the Russian airforce is sometimes called in to bomb ice jams. Some districts, where flooding is especially common, do preemptive ice blasting. The city of Ottawa, Ottawa, Ontario, Canada, for instance, blasts the Rideau River each spring to break up the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Explosives
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An explosive charge is a measured quantity of explosive material, which may either be composed solely of one ingredient or be a mixture containing at least two substances. The potential energy stored in an explosive material may, for example, be * chemical energy, such as nitroglycerin or grain dust * pressurized gas, such as a gas cylinder, aerosol can, or BLEVE * nuclear energy, such as in the fissile isotopes uranium-235 and plutonium-239 Explosive materials may be categorized by the speed at which they expand. Materials that detonate (the front of the chemical reaction moves faster through the material than the speed of sound) are said to be "high explosives" and materials that deflagrate are said to be "low explosives". Explosives may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Jam
Ice jams occur when a topographic feature of the river causes floating river ice to accumulate and impede further progress downstream with the river current. Ice jams can significantly reduce the flow of a river and cause upstream flooding—sometimes called ice dams. Ice jam flooding can also occur downstream when the jam releases in an outburst flood. In either case, flooding can cause damage to structures on shore. Overview An ice blockage on a river is usually called an ''ice jam,'' but sometimes an ''ice dam''. An ice jam is an obstruction on a river formed by blocks of ice. Defined by the International Association of Hydraulic Research (IAHR) Working Group on River Ice Hydraulics an ice jam is a "stationary accumulation of fragmented ice or frazil that restricts flow" on a river or stream. The jam may effectively create a dam with an accumulation of anchor ice on the bottom of the river. On rivers the obstruction may be a change of width, structure, bend or decrease in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flood
A flood is an overflow of water ( or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are an area of study of the discipline hydrology and are of significant concern in agriculture, civil engineering and public health. Human changes to the environment often increase the intensity and frequency of flooding, for example land use changes such as deforestation and removal of wetlands, changes in waterway course or flood controls such as with levees, and larger environmental issues such as climate change and sea level rise. In particular climate change's increased rainfall and extreme weather events increases the severity of other causes for flooding, resulting in more intense floods and increased flood risk. Flooding may occur as an overflow of water from water bodies, such as a river, lake, or ocean, in which the water overtops or breaks levees, resulting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siberia
Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive region, geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of Russia since the latter half of the 16th century, after the Russians Russian conquest of Siberia, conquered lands east of the Ural Mountains. Siberia is vast and sparsely populated, covering an area of over , but home to merely one-fifth of Russia's population. Novosibirsk, Krasnoyarsk and Omsk are the largest cities in the region. Because Siberia is a geographic and historic region and not a political entity, there is no single precise definition of its territorial borders. Traditionally, Siberia extends eastwards from the Ural Mountains to the Pacific Ocean, and includes most of the drainage basin of the Arctic Ocean. The river Yenisey divides Siberia into two parts, Western Siberia, Western and Eastern Siberia, Eastern. Siberia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ottawa
Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern Ontario, southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core of the Ottawa–Gatineau census metropolitan area (CMA) and the National Capital Region (Canada), National Capital Region (NCR). Ottawa had a city population of 1,017,449 and a metropolitan population of 1,488,307, making it the list of the largest municipalities in Canada by population, fourth-largest city and list of census metropolitan areas and agglomerations in Canada, fourth-largest metropolitan area in Canada. Ottawa is the political centre of Canada and headquarters to the federal government. The city houses numerous List of diplomatic missions in Ottawa, foreign embassies, key buildings, organizations, and institutions of Government of Canada, Canada's government, including the Parliament of Canada, the Supreme Cour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rideau River
The Rideau River (french: Rivière Rideau) is a river in Eastern Ontario, Canada. The river flows north from Upper Rideau Lake and empties into the Ottawa River at the Rideau Falls in Ottawa, Ontario. Its length is . As explained in a writing by Samuel de Champlain in 1613, the river was given the name "Rideau" (curtain) because of the appearance of the Rideau Falls. The Anishinàbemowin name for the river is "Pasapkedjinawong", meaning "the river that passes between the rocks." The Rideau Canal, which allows travel from Ottawa to the city of Kingston, Ontario on Lake Ontario, was formed by joining the Rideau River with the Cataraqui River. The river diverges from the Canal at Hog's Back Falls in Ottawa. In early spring, to reduce flooding on the lower section of the river, workers from the city of Ottawa use ice blasting to clear the ice which covers the river from Billings Bridge to Rideau Falls by cutting "keys" through the ice and using explosives to break off la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
