ABSTRACT
The new type GCLs come out in 1987 at a Germany company. In 1989, GCLs was widely applied in sanitary landfills in USA. The national code for the new type liner material was taken to draw up which was finished in 1999 completely. There was limited information on GCL. For composite lined and geomembrane systems, the leak detection system flow rates were utilized. The average monthly flow rate for composite liners ranged from 0∼32 l/ hd for geomembrane and GCL systems. A GCL was installed on the bottom of a salinity-gradient solar pond in Texas in 1994.
