Qanat (subterranean channel) water profiles

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(First:my english speaking and writingis not good.sorry) i read a paper about Qanat water profile (Modeling of water surface profile in subterranean channel by DQM) and i have a question about it:
what is the application of subterranean channel water profiles? where is it usefull?in where?
 

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Many communities in hot, arid climates depend upon qanats for their water supply. I imagine that knowing what controls flow rates, water depth etc in such systems would be important to ensure they are used with maximum efficiency. Perhaps you could provide a link to the paper you mentioned.
 
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Many communities in hot, arid climates depend upon qanats for their water supply. I imagine that knowing what controls flow rates, water depth etc in such systems would be important to ensure they are used with maximum efficiency. Perhaps you could provide a link to the paper you mentioned.
Modeling of water surface profile in subterranean channel by differential quadrature method (DQM)
Applied Mathematical Modelling, Volume 33, Issue 3, March 2009, Pages 1295-1305
Amir Robati, Gholam Abbas Barani
download it from http://www.sciencedirect.com
 

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