1. Writing -Original draft;Ganggui Liu;Xue Luo: Conceptualization, Methodology, Supervision, Wrinting-Review & Editing. Hang Wang ? Methodology, Software and Investigation. Hui Li ? Methodology, Software and Investigation
2. Measurement of permeability using a bench-top centrifuge;C Anderson;G�otechnique,2015
3. Standard test method for measurement of soil potential(suction) using filter paper;Astm D5298;Annual Book of ASTM Standards; American Society of Testing and Materials,1992