Variation Characteristics and Influencing Factors of Hydrogen-Oxygen Stable Isotope in Precipitation of Yinchuan Area

According to the isotope data of the long time from the IAEA,the author analyzed the characters of the composition of precipitation in Yinchuan area.Then the meteoric water line was drawn.The result demonstrated that the local meteoric water line was in line with the globe meteoric water line,but the slope and intercept were a little less and uneven distribution.Therefore,it's mean that the local meteoric water was influenced by many factors.Base on the analyzed results,the author thought that the temperature and season are the chief factors,the precipitation factor was not very striking,maybe covered by the temperature factor.