Appendix - estimates, and what they rest on
Generated by estimate_aquifer_unknowns.py. Every number in the aquifer model that is not a measurement is listed here. Nothing below is hidden in a script.
Generated by estimate_aquifer_unknowns.py. Every number in the aquifer model that is not a measurement is listed here. Nothing below is hidden in a script.
How to read the confidence column
| mark | meaning |
|---|---|
| published | a cited value for THIS unit |
| analogue | a cited value for a comparable unit elsewhere |
| inferred | reasoned from lithology and flow mechanism, no citation |
| guess* | a placeholder, present only so the unit can be ranked at all |
A guess should be read as we cannot currently rank this aquifer, not as a number.
The estimates
| aquifer | T m2/d | Sy | k /day | tau | tier | conf |
|---|
What each rests on
Still unestimated
Nothing. Every registered aquifer now carries a leakage value, though several are weak.
The honest summary
Two of seven aquifers have a leakage value that is not a guess or an inference: the Sherwood (derived from published T and Sy) and the Chalk (assumed outright). Everything else in the tier assignment rests on the table above.
The tier boundaries themselves are not estimates - they come from the calendar, not the rock. What is estimated is which side of them each aquifer falls, and for five of seven that is currently a judgement about lithology rather than a measurement.