GEOEXPO LIMITED

Abstract

Before borehole drilling there is need to conduct a Hydro-geological Survey in the proposed site. Generally groundwater is unequally distributed surveys ascertains suitable sites for exploration of significant quantities of groundwater before carrying out any drilling exercise. This ensures the best spot is selected according to the geological data and our clients’ plan. The hydro-geological data, maps, graphs and cross-section profiles obtained from the hydro-geological survey are used in determination of important information such as estimation of drilling depth and Identification of stress areas.

Conducting Hydrogeological Surveys

We carry out Borehole Site Investigations, groundwater availability studies and management, water resources management, aquifer mapping and modelling, wellfield designs, and groundwater monitoring. We further assist you in Borehole condition assessment, groundwater recharge estimation, groundwater quality assessment, and determination of groundwater abstraction patterns.

How do we Achieve this?

The following procedure is as followed;

• 1. Detailed desk study; This involves review of existing borehole data, drill logs, topographical maps, satellite images, existing studies and other borehole site investigations in the vicinity, geological reports and maps, borehole.
• 2. Hydro geological survey; Detailed reconnaissance survey for the project area, GPS coordinates, inspection of geological, geo-morphological and structural characteristics of the investigated area. Geophysical prospecting within the study area using a combination of the most suitable geophysical methods such as Vertical Electrical Sounding (VES) using ABEM terrameter LS2. It is expected that the survey will traverse the area in swipes spanning 30m–50 m. The survey will be conducted at two different sites within the same locality to ensure that optimum location of borehole, accuracy of geophysical and hydro geological survey is validated.
• 3. Geophysical measurements; resistivity profiling (HEP) and vertical electrical sounding (VES).
• 4. Analysis of hydro geological and geophysical data.
• 5. Compilation, analysis and evaluation of gathered data and information.
• 6. Site identification, selection, and reporting on the same.