INFLUENCE OF TOPOGRAPHIC POSITION IN AIRPHOTO IDENTIFICATION OF PERMAFROST

THE DEVELOPMENT IS REPORTED OF THE USE OF AERIAL PHOTOGRAPHS IS THE DETERMINATION OF THE PRESENCE OR ABSENCE OF DETRIMENTAL PERMAFROST. THE TECHNIQUE USED IN AIRPHOTO IDENTIFICATION OF PERMAFROST IS A DIRECT RESULT OF PAST AND PRESENT RESEARCH DONE AT PURDUE UNIVERSITY AND CONDUCTED BY THE JOINT HIGHWAY RESEARCH PROJECT OF THE ENGINEERING EXPERIMENT STATION UNDER CONTRACT WITH THE ST. PAUL DISTRICT ENGINEER OFFICE OF THE CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY. THE PAPER REPORTS THE INFLUENCE OF TOPOGRAPHIC POSITION IN THE IDENTIFICATION OF ROCK AND THE INTERPRETATION OF SOIL AND PERMAFROST CONDITIONS FROM AERIAL PHOTOGRAPHS. PERMAFROST IS DEFINED, AND THE FACTORS THAT AFFECT THE EXISTENCE OR NON-EXISTENCE OF PERMAFROST ARE GIVEN IN RELATION TO THE CLIMATIC INFLUENCE AND THE TOPOGRAPHIC POSITION. SEVERAL BASIC TOPOGRAPHIC SITUATIONS ARE DISCUSSED TO ILLUSTRATE THIS RELATIONSHIP. THE TOPOGRAPHIC TYPES DISCUSSED INCLUDE UPLANDS, TRANSITION ZONES AND VALLEY FILL, TERRACES, AND FLOOD PLAINS. EACH OF THESE SEVERAL LANDFORMS ARE DESCRIBED. THE ENGINEERING PROBLEMS ASSOCIATED THEREWITH ARE SET FORTH, AND THE ESSENTIAL AIRPHOTO-IDENTIFICATION ELEMENTS ARE DELINEATED. IT HAS BEEN POINTED OUT THAT AIRPHOTO-PATTERN ELEMENTS OF ARCTIC AND SUBARCTIC REGIONS HAVE BEEN DETERMINED FOR PRACTICALLY ALL DRAINAGE FEATURES, SOIL-COLOR TONES, VEGETATIVE TYPES AS WELL AS FOR TOPOGRAPHIC POSITION. ALL OF THESE ELEMENTS ARE IMPORTANT IN THE DETERMINATION OF THE EXTENT OF DETRIMENTAL PERMAFROST BUT IT IS CONCLUDED THAT THE INFLUENCE OF TOPOGRAPHIC POSITION IS BY FAR THE MOST IMPORTANT FACTOR IN IDENTIFICATION OF PERMAFROST IN SUB- ARCTIC REGIONS. /AUTHOR/

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  • Authors:
    • Frost, Robert E
    • Mintzer, Olin W
  • Conference:
  • Publication Date: 1950

Language

  • English

Media Info

  • Media Type: Print
  • Features: Photos; References; Tables;
  • Pagination: pp 100-121
  • Monograph Title: Soil exploration and mapping
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00229572
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Aug 15 2004 2:38AM