Submitted on: 18 April 2011.
Revised on: 23 July 2011.
Accepted on: 17 August 2011.
___________________Journal of Hydro-environment Research
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http://reply.papertrans.cn/2/173/17276/17276-33.png
Submitted on: 10 September 2015.
Revised on: 07 January 2016.
Accepted on: 02 February 2016.
___________________Journal of Hydro-environment Research
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Submitted on: 09 February 2008.
Revised on: 30 April 2008.
Accepted on: 02 June 2008.
___________________Journal of Hydro-environment Research