Amended Geophysics for Groundwater Exploration: coastal pilot in Kwale County
The 'Improving Sustainable Groundwater Exploration with Amended Geophysics' research project (ISGEAG) aims to improve geophysical assessment methods for sustainable groundwater exploration. Main objective is to investigate the added value of new geophysical techniques in Kenyan groundwater exploration in comparison to the common practices in using conventional methods like VES soundings and HEP profiling as well as to address the limitations and commonly encountered pitfalls in Kenyan ‘borehole siting’ practices.
The project is funded by the Dutch innovation programme VIA Water. The first pilot research has been done in 2017 near Kajiado Town, (the reports can be found on https://www.samsamwater.com/projectdata.php?projectid=81.
This second ISGEAG pilot was conducted in the typical coastal geology of Kwale County near the Base Titanium Ltd. wellfield in Gongoni Forest, west of Gazi.
|Project location:||Kwale County, Gongoni Forest near Gazi, Kenya|
|(find climate data for this location)|
|Project manager:||Harry Rolf and Michel Groen (Wiertsema & partners) project managed by Acacia Water|
Data for this project
Detailed technical Interpretation and inversion of the VES soundings that were conducted during the ISGEAG Kwale campaign.
Zip data files, giving all the raw measured data and locations of the ISGEAG TDEM, AMT and ERT soundings.
Technical report, giving the outcomes of the second ISGEAG field campaign in typical coastal geological setting: coastal sedimentary rock and fresh-salt water intrusion issues in Kwale County. Thanks to the good reference data of Base Titanium Ltd the research shows that new geophysical methods such as TDEM, AMT and ERT are important improvements to explore the substrate at depths beyond 70 meters, which is more or less the depth of exploration of the conventional VES method. The coastal area with a relatively low electrical resistivity at depth and saline groundwater intrusion issues is particularly suitable for the application of TDEM. Especially the TDEM WalkTEM instrument appears to be very useful for practice.
|Author:||M. Groen, H. Rolf, C.Rutto|