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2017

not negligible, and such a difference

increased with the decreasing specific
storage. We also found that BTCs

were not sensitive to the inertial force
coefficient, while they were sensitive

to the wellbore storage. BTCs with
different radius of the wellbore (rw)

were clearly different from each other,
and a larger rw resulted in a greater

concentration at the well during the extraction phase.
论文链接：https://doi.org/10.1016/j.jhydrol.2017.03.066

7.Well hydraulics in pumping tests with exponentially decayed rates of abstraction

in confined aquifers
作 者：ZhangWen; HongbinZhan ;QuanrongWang; XingLiang; TengMa; ChenChen.
JOURNAL OF HYDROLOGY 卷 : 548 页 : 40-45 出版年 : MAY 2017

摘 要 ：Actual field pumping tests often involve variable pumping rates which cannot
be handled by the classical constant-rate or constant-head test models, and often require a

convolution process to interpret the
test data. In this study, we proposed a

semi-analytical model considering an
exponentially decreasing pumping rate

started at a certain (higher) rate and
eventually stabilized at a certain (lower)

rate for cases with or without wellbore
storage. A striking new feature of the

pumping test with an exponentially
decayed rate is that the drawdowns

will decrease over a certain period of
time during intermediate pumping stage, which has never been seen before in constant-rate or

constant-head pumping tests. It was found that the drawdown-time curve associated with an
exponentially decayed pumping rate function was bounded by two asymptotic curves of the

constant-rate tests with rates equaling to the starting and stabilizing rates, respectively. The

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