On September 3 4, 2013, O Brien appeared on the Dr . Phil Show in a two-part series after O Brien escorted professional locator Troy Dunn into the underground flood channels of Las Vegas.
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The Los Angeles County Public Works Department already conducts year-round maintenance of its more than 500 miles of flood channels, 2, 400 miles of storm drains and 70, 000 basins created to catch debris during floods.
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As a result, building on floodplains was banned, new flood control works such as dams and flood channels were built, and the lands of floodplains were cleared of buildings, conserved as park lands and conservation areas.
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The leftover higher locations, typically natural levees at the margins of the flood channel, will themselves be eroded by lateral stream erosion and from local rainfall and possibly wind transport if the climate is arid and does not support soil-holding grasses.
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Measures in the plan include : placing and moving dykes, depoldering, creating and increasing the depth of flood channels, reducing the height of the groynes, removing obstacles, and the construction of a " Green River " which would serve as a flood bypass.
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Whatever removal method is chosen, it's going to take a lot of time and money to break the hold Ludwigia has on the laguna and the flood channels, Strong said . " It's a big deal, and it's going to cost some money, he said.
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It was the hope of seeing a variety of rocks, carried downstream from different parts of Mars and different geological formations by a long-ago cataclysmic flood, that led the team to choose this ancient flood channel as the Pathfinder's landing site, and their hopes have been rewarded.
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MARS-PATHFINDER-BOS ( Undated ) _ HOPES OF LATEST MISSION RIDE ON AIRBAGS : It was the Fourth of July 21 years ago, and a spacecraft from Earth was poised to make the first-ever landing on Mars, in a region called Ares Vallis, the remnant of an ancient flood channel.
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Commissioned by the Army Corp of Engineers, which also transformed the flood channel into a sylvan park with an adjoining pedestrian walkway, the mural is also considered by many to be the flagship for a vast collection of outdoor artworks that sprang up throughout the city beginning in the early 1970s.
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Windeck might have looked much as Karl Bronner has reconstructed it no later than that : in the centre the four-sided tower with entrance and wooden parapet eight metres high, girded by an inner wall with a moat and an outer wall, through which flowed either the S�lzbach or the flood channel.
