Determination of Underground water Contamination Zone and Water Table by Seismic Refraction Method at Al- Kifel City South of Hilla City Middle Iraq

A seismic refraction investigation was carried out at a site in Al-Kifel area for delineating water table and determining the velocity of different layers, as well as, locating the contamination zones in underground water which are resulted from agricultural activities in the study area. Five seismic profiles at five points were carried out in this study using ABEM TERRALOC seismic system. The length of profiles at each point is (120) m. with normal and reverse shooting. The recorded field data were interpreted by generalized reciprocal method. The velocity of the first layer ranges from (534-1271) m/sec. and its average is (899.28) m/sec. while the velocity of the second layer ranges from (835- 2107) m/sec. and its average is (1720.9) m/sec. In this study depth to the second layer represents the average depth of water table in the area with a value 2.4m. from earth s surface and the elevations of the water table above sea level ranges between (11.6- 19.6) m. Finally the contour map of water table above S.L. was drawn and contamination zones were determined.