Subsurface Probe and Geophysical Analysis for Ground Water Flow Direction and Siting of Dumpsites in Orogun Main Town, Delta State of Nigeria

: A study was carried out in Orogun main town in Ughelli North local government area of Delta state of Nigeria to determine the best locations for dumpsite and borehole for potable water supply. This was achieved by using the Global Positioning System (GPS) and the meter tape. The longitudes, latitudes and elevations of sixteen locations evenly distributed within Orogun main town were measured and recorded with the aid of the Global positioning system. Using the meter tape, the depths to water levels in the hand dug wells at the same locations were also measured. The water elevation contour map of Orogun town revealed that ground water flow direction is towards the North-Western part of the region. In the event of pollution, boreholes within the North-Western part of Orogun main town are prone to contamination. This is because any contaminant in the South, East, West and North-Eastern part of Orogun migrates and settles in the North-Western regions. Hence, dumpsites could be sited in the North-Western part while boreholes for potable water could be sited within the South, East and North Eastern part of Orogun main town in other to minimize groundwater contamination and hence avoid water borne diseases. The present study acts as a guide for the location of dumpsites and future exploration and exploitation of groundwater to avoid water borne diseases.