IF CITYs DRAINAGE GOES WRONG ? https://youtube/watch?v=UuFiNt9qZB8 youtube/watch?v=4BkFp5CL4q0&feature=related There is interesting physics behind these sewage geysers. If there is a sudden rain downpour somewhere in the city and that so much water has run downhill through the drainage pipe that it erupts from a vertical shaft of the drainage elsewhere in the city. The water flows through the drainage pipe, rapidly filling a temporary storage area at the low end. As more water flows toward that area, a surge front of high pressure in the water moves up the pipe. When the surge front reaches a vertical shaft, it pushes water up the shaft so rapidly that the water gushes from the shaft, as we see in the video. That upward motion relieves the water pressure down in the pipe but within seconds, the column of water still in the shaft slumps, sending a high pressure wave back down the pipe toward the storage area. The wave reflects from the lower end, and when it returns to the vertical shaft, another geyser shoots out of the shaft. Moral of this story: For the City Corporation : Maintain and clear the drainage regularly. For the common man : DO NOT PARK YOUR VEHICLES OVER MANHOLES. :-)
Posted on: Wed, 05 Nov 2014 02:42:20 +0000
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