Fig. 7.
The panels present basal pore pressure over time at three locations. Panel a shows C 1 P P T 1 with values increasing from near 0 kilopascal at 30 second to about 3 kilopascal near 45 second, then decreasing gradually towards 0. Panel b shows C 3 P P T 1 with values rising from near 0 kilopascal at 30 second to about 2.5 kilopascal near 75 second, then decreasing to near 0. Panel c shows C 7 P P T 1 with values near 0 until about 60 second, then increasing to about 1.5 kilopascal near 75 second, followed by a gradual decrease.Time histories of measured basal pore pressures in the upstream pressure transducers (PPT1) of basal instrumentation cells (a) C1, (b) C3 and (c) C7. Shaded region in (a) between t = 40 s and 60 s is used in estimating debris fluidisation ratio ()