| dc.description.abstract | Groundwater is a reliable freshwater resource in many areas, and it is also an important source of backup water during the drought. Therefore, understanding the characteristics of groundwater resources is crucial and can be explored by building correct hydrogeological models for simulation. To build a perfect hydrogeological model, it is necessary to grasp the correct geological conditions and hydrogeological parameters to establish an effective numerical simulation of groundwater flow. However, geological conditions always contain some uncertainties, which may cause a certain impact on the spatiotemporal changes of groundwater.
Therefore, this study uses the groundwater flow numerical model, MODFLOW, to build the groundwater simulation model, divided into the ideal case and real case, the ideal case is to compare the experimental control group through groundwater numerical simulation and sandbox experiment, In addition, through sensitivity analysis to explore the impact of the hydraulic derivation of the detailed changes, change the setting of aquiclude to observe the changes of groundwater level in different aquifers, the real case simulates the Minxiong Industrial zone in Touqiao, Chiayi, and the simulation time is divided into one year and five years, the simulation results show the first aquifer R2 can all reach 0.9 compare with the groundwater real observation data, the results show that under different hydrological parameters, geology, and other conditions, groundwater will have different patterns of variation.
In addition, the Empirical Orthogonal Function (EOF) is used to explore the temporal and spatial characteristics of ideal cases and real cases, through this research, it can be found that there are differences between an unconfined aquifer and a confined aquifer, and when this area is a confined aquifer, the influence on the trend and flow characteristics of the groundwater level caused by this area. Besides, the research results show that whether it is an ideal case or a real case, the EOF method can be used to effectively distinguish different hydrogeological parameter distribution situations. Therefore, if relevant units want to conduct water resources management and deployment in the future, they can discuss and compare the first aquifer, if it is found that the same area has different groundwater level characteristics, it is likely to be affected by the confined aquifer. | en_US |