Submitted on: 28 March 2016.
Revised on: 08 June 2016.
Accepted on: 03 July 2016.
___________________European Journal of Environmental and Civil Engineering
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Submitted on: 31 July 2000.
Revised on: 20 August 2000.
Accepted on: 15 October 2000.
___________________European Journal of Environmental and Civil Engineering
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