At home and abroad, the native soil, the eolian soil, the moraine, the diluvial soil, the age-old river sediments and the recent river shoal sediments were researched as material core for ECRD.

• 作为土石坝防渗体的心墙土料,国内外实践中曾经用过残积土、风成土、冰渍土、洪积土、古河川沉积及近代河滩沉积土。