| dc.description.abstract | In recent years, Taiwan has been affected by extreme climate and changes in rainfall patterns, surface water sources are unstable and cannot be used for a long time, resulting in an imbalance between supply and demand for water resources. Some areas have to pump groundwater to make up for the lack of water demand. If groundwater is pumped for a long time, it will This leads to rapid decline or even depletion of groundwater sources.
This study focuses on two administrative districts in Kaohsiung, Meinong and Qishan, using a Numerical modeling of Groundwater (MODFLOW) to simulate groundwater behavior. The model was calibrated and evaluated using correlation coefficients (R2) and root mean square error (RMSE) as criteria. The validation results showed high correlation coefficients, all above 0.7, indicating a strong relationship. The root mean square error for Meinong is 1.344m, while the others range from 0.2-0.4m. This suggests that the groundwater flow model established in this study can represent groundwater variations effectively.
Groundwater resources have become a major source of water for Taiwan. As a result, this study is intended to explore changes in groundwater levels from 2020 to 2023. Analysis of the simulation results shows that the factors with the greatest impact on groundwater are precipitation and pumping volume. Furthermore, the pumping volume is lower during periods of rain and higher during periods without precipitation. According to the simulated groundwater level changes, comparing the period before May 2023 to the dry period in 2020, Meinong District, Jiyang District, and Zhongzhou District experienced a respective decrease of 2.59m, 3.12m, and 4.07m. This indicates that the groundwater level in 2023 is lower than that in 2020. | en_US |