HR: 13:55h
AN: C23B-02    [Abstracts]
TI: Characteristics of Ground Ice Distribution in Permafrost Regions Along Qinghai-Tibet Highway, China
AU: Zhao, L
EM: linzhao@lzb.ac.cn
AF: Cryosphere Research Station on Qinghai-Xizang Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, 320 Donggang West Rd., Lanzhou, 730000 China
AU: * Jin, H
EM: hjjin@lzb.ac.cn
AF: State Key Laboratory on Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, 320 Donggang West Rd., Lanzhou, 730000 China
AU: Wang, S
EM: linzhao@lzb.ac.cn
AF: Cryosphere Research Station on Qinghai-Xizang Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, 320 Donggang West Rd., Lanzhou, 730000 China
AB: More than thousands boreholes were drilled along Qinghai-Tibet Highway to investigate the permafrost distribution during the past 50 years. Permafrost profiles from 697 boreholes, of which 9261 soil water content measurements were conducted, were selected to analyze the characteristics of ground ice distribution. Based on the horizontal distribution of ground ice and water content revealed from borehole profiles, the permafrost along the QTH was divided into 5 types, i.e., low-ice content permafrost, high-ice content permafrost, ice rich permafrost, ice saturated permafrost and ice-layer with soil. The length of each type of permafrost along the QTH was calculated. The vertical distribution of ground ice was also calculated in 3 depths, i.e., within 1 m below the permafrost table, from 1 to 10 m below the permafrost table, and under 10 m below the permafrost table. The average thickness of permafrost along the QTH is about 38.79 m, and the average weighted water content is about 17.19%. Therefore, the total volume of ground ice in the permafrost region on the Tibetan plateau was estimated as 9,528 km3.
DE: 0702 Permafrost (0475)
SC: Cryosphere [C]
MN: Fall Meeting 2005