Submitted on: 31 October 2006.
Revised on: 06 December 2006.
Accepted on: 23 December 2006.
WATER RESOURCES RESEARCH
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Submitted on: 14 November 2011.
Revised on: 05 December 2011.
Accepted on: 12 December 2011.
WATER RESOURCES RESEARCH---AMER GEOPHYSICAL UNION
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Submitted on: 11 June 2012.
Revised on: 21 June 2012.
Accepted on: 09 July 2012.
WATER RESOURCES RESEARCH
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