Accession Number : AD0753034

Title :   Permafrost Erosion in Yamal (Proyavlenie Erozii v Mnogoletnemerzlykh Porodakh na Yanale),

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Shamanova,I. I.

Report Date : NOV 1972

Pagination or Media Count : 12

Abstract : The region under study is a distinctly terraced, gently rolling aggradation plain with erosion-thermokarst runoff belts and numerous thermokarst lakes. The climate in the region is severe; the average many years' air temperature is -9.5C. The thickness of the frozen layers in a large part of the territory exceeds 300 to 400 m; their most typical temperature at the base of the layer of annual heat exchanges is -6 to -7C. The thickness of the seasonally thawing soil layer under the influence of a grouping of natural factors (composition of sediments depth of mossy-lichen layer and peaty horizon, position of sector in relief, etc.) will fluctuate from 0.25 to 0.3 m (in the peat bogs) to 1.3 m (in the watershed sectors with mottled microrelief). (Author)

Descriptors :   (*PERMAFROST, EROSION), SOILS, HYDROLOGY, CLIMATE, HEAT TRANSFER, SEDIMENTATION, THERMAL PROPERTIES, DRAINAGE, TERRAIN, ICE, THICKNESS, SNOW, USSR

Subject Categories : Soil Mechanics
      Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE