The Use of the Value of Heat Cycle to Assess the Energy Stability of Permafrost Soils at the Change of Conditions on the Surface

Abstract

The basis for assessing the stability of geosystems to changes in external heat cycle conditions is the calculation method. It is shown that permafrost soils are characterized by increased values of annual heat cycle QY ≥ 300 MJ/m2, i.e., half-sum of heat arrival and flow rate per year. This is due to the high heat consumption for melting soils (QPh = 0.7–0.8 QY) and warming them in the negative temperature range (QF). The heat cycle in frozen soil (QF) always has more heat cycle than in the thawed soil (QH). The condition QF > QH means the dominance of processes occurring at negative temperature, and the difference QF − QH is a quantitative assessment of the energy stability of soils to changes in heat exchange conditions on the surface.

Permafrost Landscapes: Classification and Mapping

“…The heat cycle in permafrost soils is an important characteristic in assessing the stability of permafrost landscapes. Kulikov et al [3] present the scale of thermal energy resistance of permafrost landscapes to external influences. Permafrost soils are characterized by increased annual heat cycle, the value of which usually exceeds 300 MJ/m 2 .…”

“…Earlier studies of CO 2 and CH 4 fluxes tended to focus on permafrost degradation, but it has become evident that more attention should be given to greenhouse gas emission from the alas landscapes [1]. Monitoring of the dynamics of permafrost landscapes and preliminary stability assessments will continue to be important and necessary [2,3]. The use of land surface temperature (LST) data from the Landsat-5 satellite in combination with other surface indicators has resulted in improvements in permafrost-landscape mapping [4] and has great potential for future applications.…”

Geotechnical study to assess the weir stability on high erodible soils

“…This leakage caused many serious problems in the structure foundation soils, like seepage erosion, soil heave, and uplift. The type and intensity of these problems depends on the hydraulic head and geotechnical properties of foundation soil like hydraulic conductivity and particle size [1,2]. To understand the behavior of any dam or weir foundations against piping, a numerical, analytical and experimental analysis methods are developed to simulate the water and soil failure during project life.…”