Abstract
Structural features of a lake talik associated with eolian relief are discussed. Analysis of hydrochemical and hydrological data for 2010-2017 showed that talik groundwater feeds lake and maintains perennial outflow from the lake. Variations in the chemical composition of the lake and outflowing creek are characterized on an annual and interannual basis. Seasonal comparison of hydrochemical data indicates a downward trend in dissolved-solids content of the lake water over the last six years, suggesting an increasing contribution of suprapermafrost groundwater to the lake and lake talik. Probable reason of enhanced suprapermafrost flow is increase of its duration due to observed rise of winter air temperature.
Highlights
Introduction and study siteMost of the taliks in continuous permafrost environment are associated with rivers and lakes
At the Lena-Aldan interfluve lakes with high-quality talik water are associated with vegetated stable dune massifs
Suprapermafrost water of the active layer was sampled from pits
Summary
Most of the taliks in continuous permafrost environment are associated with rivers and lakes. At the Lena-Aldan interfluve lakes with high-quality talik water are associated with vegetated stable dune massifs. Hypothesis suggests that such lakes are feeded by groundwater of subaerial suprapermafrost and intrapermafrost talik aquifers. To check this hypothesis study of hydrogeology and permafrost system of lake Unugestyakh watershed was performed. The study site is located within the Bestyakh Terrace of the Lena River with elevations ranging from 120 to 160 m a.s.l. Permafrost thickness varies from 200 to 400 m. Shallow (3.5-4.0 m deep) lakes could be found at depressions
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
