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A note on packer, slug, and recovery tests in unconfined aquifers
Author(s) -
Dagan G.
Publication year - 1978
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr014i005p00929
Subject(s) - slug test , hydraulic conductivity , borehole , aquifer , geology , geotechnical engineering , permeability (electromagnetism) , radius , petroleum engineering , flow (mathematics) , mechanics , soil science , groundwater , soil water , chemistry , membrane , computer science , biochemistry , physics , computer security
Packer, slug, and recovery tests are common procedures for determining the hydraulic conductivity of unconfined formations of low permeability. The volumes of water injected or removed from the borehole are small, so that the water table remains horizontal and the flow is steady. The flow problem is solved by source distributions along the well axis. A simple numerical method and numerical results covering a wide range of the parameters of the problem are presented. The main limitation of the method is the requirement that the active portion of the well length should be much larger (say, 50 times) than the well radius.