This model contains three equations; two flow equations delineate the transient drawdown distributions in the aquitard and the confined aquifer, while the other describes the vertical displacement in response to the aquitard bending.
In this study, a new mathematical model is developed to describe the spatiotemporal distribution of drawdown from stream-bank pumping with a well screened across a horizontally anisotropic, confined aquifer, laterally bounded by a river.
The spatial distributions of drawdown and recovery transmissivity in the area are shown in Fig. 5a, b.
It is shown that the classical probabilities of the reservoir being empty and those of spilling can be directly calculated based on the distribution of the critical drawdown and filling periods.
Sensitivity coefficients, which are a measure for the relationship between a change in drawdown and a change in the parameter distribution, allow the analysis of the intrinsic characteristics of pumping tests in order to provide a better understanding of their response to aquifer heterogeneity.
Figure 22 shows the distribution of pore pressure change due to drawdown pressure of 500 psi.
In addition, non-uniform fluid saturation distribution in the reservoir causes rapid pressure decline in drawdown similar to the effects of boundaries, e.g. faults.
The water drawdown significantly affected the growing period of the C. dactylon community and resulted in the spatial difference of root growth and distribution.
