1.1 There are a number of methods of determining field permeability in overburden; but this code includes only the methods mentioned in 1.2 and 1.3 which are more commonly adopted for civil engineering purposes.
1.2 Pumping in Tests (Gravity Feed in Drill Holes or Bore Holes)
a) Constant head method (cased well, open and test);
b) Falling head method (uncased well); and
c) Slug method〓.
1.3 Pumping Out Tests
a) Unsteady state〓,
b) Steady state§, and
c) Bailor method〓|.