Dynamic variations in thermal regime and surface deformation along the drainage channel for an expanding lake on the Tibetan Plateau ...

• Main Authors: Ding, Zekun, Niu, Fujun, Mu, Yanhu, Li, Guoyu, Chai, Mingtang, Gao, Zeyong, Chen, Ling, Zhang, Kun, Mao, Yuncheng
• Format: Text
• Language: unknown
• Published: Taylor & Francis 2023
• Subjects: Biochemistry; Environmental Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; Ecology; FOS Biological sciences; Inorganic Chemistry; FOS Chemical sciences; permafrost
• Online Access: https://dx.doi.org/10.6084/m9.figshare.24278413.v1; https://tandf.figshare.com/articles/journal_contribution/Dynamic_variations_in_thermal_regime_and_surface_deformation_along_the_drainage_channel_for_an_expanding_lake_on_the_Tibetan_Plateau/24278413/1

The outburst of Zonag Lake in 2011 triggered a series of floods in the continuous permafrost region of the hinterland of the Qinghai-Tibet Plateau. This re-distributed the surface water in the basin and caused rapid expansion of the tail lake (Salt Lake). To avoid potential overflow of the expanding Salt Lake, a channel was excavated to drain the lake water into a downstream river. In this study, to investigate the permafrost thermal regime and the surface deformation around the expanding Salt Lake and the channel, in-situ monitoring sections were settled from Salt Lake to the downstream of the channel to obtain the permafrost temperature. Additionally, using small baseline subset interferometric synthetic aperture radar (SBAS-InSAR), the surface deformation around Salt Lake and the channel was measured. The data showed that the ground temperature at the channel was 0.6°C higher than the natural field and the mean subsidence rate around the channel was 1.5 mm/yr higher than that at Salt Lake. These results ...