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008			230411b |||||||| |||| 00| 0 eng d
040			_aMSU _cMSU _erda
100			_aMENG, Yuchuan
245			_aStable isotopic information for hydrological investigation in Hailuogou watershed on the eastern slope of Mount Gongga, China
264			_aVerlag _bSpringer _c2013
336			_2rdacontent _atext _btxt
337			_2rdamedia _aunmediated _bn
338			_2rdacarrier _avolume _bnc
440			_aEnvironmental earth sciences _vVolume , number ,
520			_aHydrological systems have been seriously affected by changes of glaciations and snow covers in Mount Gongga, Sichuan, China, but the relevance of ice-snow melt for alpine river basin hydrology is so far not well known. To better understand hydrological features of the Hailuogou River, changes of δ18O and δ2H were investigated by analyzing 117 water samples collected from May 2008 to November 2009. Our results show that the stream water contains a relatively intermediate magnitude of isotopic variations, with δ18O ranging from −18.09 to −13.08 ‰ and δ2H from −126.5 to −88.8 ‰. The average values are both higher than those of ice-snow meltwater, but lower than those of meteoric water. These data also show a gradually increasing trend from upstream to downstream, and these changes might document the fingerprint of ice-snow melt in the headwater region and indicate the increasing recharge of heavy isotope-enriched waters with flow distance. The similarity in slopes of δ2H and δ18O relationship for meteoric waters and stream waters suggests that the isotopic signature of precipitation is well preserved in stream flow, and during the rainfall and stream flow the evaporation is only minor. Based on δ18O model, the results suggested that the fraction of ice-snow meltwater input over the total stream flow ranged from 84.50 to 86.52 % in the headwater region, but the fraction of ice-snow meltwater input from upper basin downward was significantly decreased. The study demonstrates that ice-snow meltwater is a substantially important water source in alpine regions on the edge of Tibetan Plateau.
650			_astable isotope
650			_ahailuogou watershed
650			_aice-snow meltwater
700			_aLIU, Guodong
856			_uhttps://doi.org/10.1007/s12665-012-1931-5
942			_2lcc _cJA
999			_c161659 _d161659