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Geoscience ›› 2010, Vol. 24 ›› Issue (2): 377-382.

• Water Resource and Environment • Previous Articles     Next Articles

210Pb and 137Cs Dating and Modern Sedimentation Rate in the Wulungu Lake, Xinjiang

JIN  Ai-Chun1, JIANG  Qing-Feng2,3, CHEN  Ye1,ZHANG  Guang-Sheng4, ZHAO  Yong-Jie1   

  1. 1.School of Geography,Nanjing Normal University,Nanjing, Jiangsu210046, China;    2. School of Geography Science, Nantong University, Nantong, Jiangsu226007, China;   3.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China;   4. School of Geographical and Oceanographic Sciences, Nanjing University, Nanjing, Jiangsu210093, China
  • Online:2010-04-20 Published:2010-05-10

Abstract:

Using 210Pb and 137Cs dating methods, based on observation on profiles of two sediment core samples,the average deposition rate of the Wulungu lake in recent decades is determinated.  Sedimentation rates of  210Pb (CRS model) determination range from 0.018 to 0.071 g/(cm2·a) and sedimentation rates  of  137Cs determination  range from 0.034 to 0.060 g/(cm2·a). The results showed a relatively good agreement with each other. It is indicated that natural factors have much more influence than human activities on the sedimentation rate of Wulungu lake before 1960s. With the development of agriculture and implementation of water transfer project at the middle and lower reaches of Wulungu River, human activities gradually become the dominant factor in the evolution of lakes, thus affecting the sedimentation rate of Wulungu lake after 1960s.

Key words: Wulungu lake, 210Pb, 137Cs, modern sedimentation rate, human activity

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