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AQUIFER PARAMETERS FROM CONSTANT DRAWDOWN NONSTEADY‐LEAKY TYPE CURVES 1
Author(s) -
Motz Louis H.
Publication year - 1990
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1990.tb01366.x
Subject(s) - aquifer , drawdown (hydrology) , aquifer test , dewatering , constant (computer programming) , groundwater flow , geology , sink (geography) , geotechnical engineering , boundary value problem , soil science , hydrology (agriculture) , mechanics , groundwater , mathematics , mathematical analysis , groundwater recharge , physics , computer science , cartography , geography , programming language
A drain function and set of type curves were defined for the mathematical solution that represents one‐dimensional flow under nonsteady conditions in a leaky aquifer for the constant drawdown boundary condition. A match point procedure was developed for determining the aquifer parameters transmissivity, storage coefficient, and leakance based on the drain function and type curves. Use of the procedure is illustrated by an example that utilizes simulated aquifer drawdowns and flowrate data. The drain function and type curves developed in this investigation include the effects of leakage for the constant drawdown boundary condition, which is not included in the existing drain function and type curve found in the literature. Thus, a new set of type curves was developed that can be used to analyze drawdowns for one‐dimensional flow in a leaky aquifer with constant drawdown at a line sink. Applications would include flow to a canal or river, drainage of agricultural lands, and dewatering associated with strip mining operations.