| Abstract |
Thermal waters ascending from geothermal systems may cool due to conduction of heat to the surrounding rocks, mixing with cooler water, boiling, or by a combination of these factors. New springs started flowing on November 1991 during road works. After 12 October 1992 earthquake the total discharge of Helwan springs reached more than 400 m3 /h with a measured temperature range between 23 ñ32o C. Applying geothermometery to Helwan Springs, suggested that reservoir temperature is between 80 o C and 160 o C. This increases the importance of developing new ways to use such large amount of water which is currently wasted by discharging to the sanitary system. |