01938nam|a2200265 i 450000500170000000800410001703500150005810000290007324501080010226000520021030000110026249000270027350001400030050200570044052007540049765000230125165000240127470000410129870000450133970000500138470000480143471000660148281000590154885600650160720260818090558.0020299s1986    th           0000|0 eng d  a.b101970961 aPereira, Vernon Fredrick10aDevelopment and testing of improved resistivity interpretation techniques for groundwater investigation  aBangkok :bAsian Institute of Technology,c1986  a185 p.1 aThesis ;vno. GT-85-17  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology  aThesis (M.Sc.) - Asian Institute of Technology, 1986  aElectric resistivity interpretation in shallow groundwater  surveys relies on an understanding of electrical anomalies caused  by specific earth structures such as gravel lenses, buried  channals etc. The numerical calculation of such anomalies by approximate techniques is especially important because of the limitations of analytic methods and the inconvenience of laboratory  modelling programs. A finite element method computer program  (develop by Rijo 1974-1975) capable of handling dipole-dipole  resistivity modelling of 2D earth structures is used in conjunction with the plotting methods of combined modified pseudo depth  sections to develop and test improved resistivity interpretation  techniques for shallow groundwater investigations. 0aWater, Underground 0aElectric resistance1 aWhitney, Joseph B. R., eChairperson0 aPrinya Nutalaya, eExamination Committee1 aBalasubramaniam, A.S.,eExamination Committee1 aRantucci, Giovanni, eExamination Committee2 aThe Royal Government of the Netherlands., eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. GT-85-17  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B19679