The use of isotope techniques and methods in catchment hydrology in the last 50 years has generated two major types of progress: (1) Assessment of the temporal variations of the major stocks and flows of water in catc...
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The use of isotope techniques and methods in catchment hydrology in the last 50 years has generated two major types of progress: (1) Assessment of the temporal variations of the major stocks and flows of water in catchments, from which the estimation of wa-ter residence times is introduced in this paper. (2) Assessment of catchment hydrologic processes, in which the interactions be-tween different waters, hydrographical separation, and bio-geochemical process are described by using isotopes tracers. Future progress on isotope techniques and methods in hydrology is toward the understanding of the hydrological process in large river basins. Much potential also waits realization in terms of how isotope information may be used to calibrate and test distributed rainfall-runoff models and regarding aid in the quantification of sustainable water resources management.
The productions of thorium and uranium are key ingredients in r-process *** the combination of improved nuclear and stellar data,we have made a detailed investigation of the r-process abundance pattern in the very met...
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The productions of thorium and uranium are key ingredients in r-process *** the combination of improved nuclear and stellar data,we have made a detailed investigation of the r-process abundance pattern in the very metal-poor halo stars based on the classical r-process *** is found that the influence from nuclear mass
The productions of thorium and uranium are key ingredients in r-process nucleo-cosmochronology. With the combination of improved nuclear and stellar data,we have made a detailed investigation of the r-process abundanc...
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The productions of thorium and uranium are key ingredients in r-process nucleo-cosmochronology. With the combination of improved nuclear and stellar data,we have made a detailed investigation of the r-process abundance pattern in the very metal-poor halo stars based on the classical r-process *** is found that the influence from nuclear mass uncertainties on a Th/U chronometer can approach 2 Gyr. Moreover,the ages of the metal-poor stars HE 1523-0901,CS 31082-001,and BD +17°3248 are determined as 11.8±3.7,13.5±2.9,and 10.9±2.9 Gyr,*** results can serve as an independent check for age estimates of the Universe.
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