Figure 5.
The panel a graph plots elapsed time from about 5229 to 5264 days. The left vertical axis gives S T P flow rate in cubic metres per second and the right vertical axis gives gas pressure in kilopascal. Gas pressure increases from about 4800 kilopascal to about 6400 kilopascal by Event 3, then decreases to about 5900 kilopascal and later stabilises near 6000 kilopascal. Predicted pressure follows the gas pressure increase before Event 3. Flow into the system remains near 3.0 times 10 to the negative 8 cubic metres per second. Flow into the buffer stays near zero before Event 3, then rises sharply to about 2.3 times 10 to the negative 7 cubic metres per second near Events 4 and 5 before decreasing to about 3.0 times 10 to the negative 8 cubic metres per second. Dashed vertical lines mark Events 1 to 6. Panel b plots pore pressure against elapsed time from about 5240 to 5250 days. Most sensor traces rise around Events 3 and 4, then decrease after Event 5. Values range from near 0 kilopascal to about 140 kilopascal. Panel c plots radial stress over the same period. Most sensor traces rise around Events 3 to 5, then remain steady or decrease slightly. Values range from near 0 kilopascal to about 250 kilopascal.Gas Test 6. (a) Flow of gas into the system and the buffer; (b) pore pressure at the deposition wall around the time of peak gas pressure; (c) radial stress on the deposition wall around the time of peak gas pressure. Note: For display purposes in (b) and (c) each sensor has undergone translation along the y-axis