These impermanent waterways are part of Oued Irharrhar, which appear to be carrying sulfur (yellow) and iron (red) deposits. The city of Amguid is located on these waterways, and all lie in the Mouydir Mountains in Algeria.
This image was taken from the Space Shuttle on February 21, 2000.
EarthKAM was formerly known as KidSat. To see images of KidSat, see http://photojournal.jpl.nasa.gov/mission/KidSat .