Hydrogeological map of the Qaidam Basin in China

Confined water type and water richness:

1.Shallow (less than 100 meters) confined water

2.Middle layer (less than 500 meters) confined water

3.Deep (more than 500 meters) confined water

Recharge source of pressurized water:

1.Gobi with gravel pebble diving

2.Mountain (a, b) and valley (c)