Research Article
Jan 1947
Drawdown Test to Determine Effective Radius of Artesian Well
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VIEW THE REPLYPublication: Transactions of the American Society of Civil Engineers
Volume 112, Issue 1
Abstract
The drawdown in an artesian well that is pumped has two components: The first, arising from the “resistance” of the formation, is proportional to the discharge; and the second, termed “well loss” and representing the loss of head that accompanies the flow through the screen and upward inside the casing to the pump intake, is proportional approximately to the square of the discharge. The resistance of an extensive artesian bed increases with time as the ever-widening area of influence of the well expands. Consequently, the specific capacity of the well, which is discharge per unit drawdown, decreases both with time and with discharge.
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Published In
Transactions of the American Society of Civil Engineers
Volume 112 • Issue 1 • January 1947
Pages: 1047 - 1064
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© 1947 American Society of Civil Engineers.
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Published in print: Jan 1947
Published online: Feb 10, 2021
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Authors
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C. E. Jacob, AM.ASCE
Hydr. Engr., Water Resources Branch; U.S. Geological Survey, Washington, D. C.
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