AN ITERATIVE METHOD FOR DETAILED DEPTH DETERMINATION FROM REFRACTION DATA FOR AN UNEVEN INTERFACE

Very small seismic refraction depths may be calculated on the basis of distance/time data, for the direct profile in the most general case of irregular interface. The determination of the inverse profile is not necessary. The iterative method reduces the work and hammering time by half of that of the conventional method of delay time in which the direct and inverse profiles are necessary along a transverse line. Results indicate that the depths may be calculated with adequate precision if the velocity and the depth under the geophone are known. The theory of the method makes an approximation to the irregular interface by means of small sections and uses this approximate limit length for the calculation of the time of displacement instead of assuming the flat limit and using horizontal distances. Furthermore, there is no accumulation of errors in the iterative process, at each stage. The errors display a tendency to cancel out. (TRRL)

• Corporate Authors:

  European Association of Exploration Geophysicists

  30 Carel van Bylandtlaan
  The Hague,   Netherlands 
• Authors:
  • Singh, S
• Publication Date: 1978-6

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 303-11
• Serial:
  • Geophysical Prospecting
  • Volume: 26
  • Issue Number: 2
  • Publisher: European Association of Exploration Geophysicists

Subject/Index Terms

• TRT Terms: Data analysis; Depth; Distance; Geology; Information processing; Interfaces; Iterative methods; Mathematical analysis; Methodology; Pavement layers; Refraction; Seismicity; Time
• Uncontrolled Terms: Seismic refraction
• Old TRIS Terms: Computing
• ITRD Terms: 6499: Depth; 4053: Geology; 5429: Interface; 6492: Iteration; 2952: Layer; 6788: Refraction; 5731: Seismic
• Subject Areas: Geotechnology; Highways; I41: General Soil Surveys;

Filing Info

• Accession Number: 00309245
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Jun 26 1980 12:00AM