Geothermal mapping using temperature measurements

Abstract

Shallow temperature gradient holes are reliable in mapping geothermal prospects with heat loss features as surface manifestation. The sun least affects ground temperatures at 1 m depth and temperatures in the North rift are least affected by seasonal changes. Over 10,736 MWt is lost naturally from Menengai to Paka along the Kenyan rift. Most of the geothermal surface manifestations associated with the heat loss are oriented in the NW-SE with a few located in the NE-SW direction. Estimated down-hole temperature at I km depth is over 200o C. Fluid flow in the prospects from Lake Baringo to Paka is from East to West with an outflow to the north.