THE USE OF TRI-GEOPHYSICAL METHODS FOR CONCEALED KARST CAVITIES LOCATION NEAR HAQLANYIAH TOWN

The main objective of the present work is to find, locate and delineate some subsurface morphological structures at area near Haqlanyiah town lying in the western part of Iraq, either as an isolated karst cavity features or as buried channel features by using three different geophysical methods, representing by electromagnetic conducting method, VLF-Radiohm electromagnetic resistivity method and electrical resistivity method with horizontal profiling using wenner array. The study area accupies an area (100x300m) and the survey was carried out along thirty one traverses with (10m) separation and (10m) grid interval. The elaborated field data were subjected to the process of analysis, a great coincidence between method results is obtained, then the results show a presence of two anomalous zones in which its characteristic features gave an indication of a presence two possible elongated concealed channels trending in two different directions as in E-W and NW-SE