**5. Conclusions**

A sensitivity analysis is not only a tool for the input importance evaluation of a groundwater simulation model, but it is also a useful method, considered with a hydrogeological map and geological characteristics, for explaining influences on the physical mechanism of groundwater infiltration, taking into account the complexity of the relevant physical groundwater model's development. This SA study is helpful to researchers wishing to study related ARL e fficiency issues.

**Author Contributions:** The authors contributed equally in preparing this manuscript. They are all well conversant with its content and have agreed to the sequence of the authorship. S.-H.H. initiated and provided the concept and monitored the groundwater table variation. L.-W.L. conducted the data analysis. W.-G.C. reviewed and edited the manuscript. Y.-M.W. supervised the analyzing work, and provided oversight for the analysis of data and editing of the manuscript.

**Funding:** This research was funded by the Pingtung County Government, Taiwan, under the gran<sup>t</sup> of "2015 Hydrological Data Analysis and Evaluation of the Great Chaozhou Artificial Groundwater Recharge Lake Implementation Plan" and partially funded by MOST, Taiwan, gran<sup>t</sup> number 105-2221-E-020-009.

**Acknowledgments:** The authors gratefully acknowledge the team of Hydraulic Laboratory of NPUST for the field observation and data analysis. Also to acknowledge the contact person Wei-Tai Lee for his sincere help.

**Conflicts of Interest:** The authors declare no conflict of interest.
