[1] IHE Inst Water Educ, Water Resources & Ecosyst Dept, POB 3015, NL-2601 DA Delft, Netherlands
[2] IAEA, Vienna Int Ctr, Isotope Hydrol Sect, POB 100, A-1400 Vienna, Austria
[3] Sun Yatsen Univ, Sch Geog & Planning, East Campus,132 Waihuan East Rd, Guangzhou 510006, Peoples R China
[4] Univ Pisa, Earth Sci Dept, Via Santa Maria 53, I-56126 Pisa, Italy