Evaluation of the Groundwater and Irrigation Quality in the Zhuoshui River Alluvial Fan between Wet and Dry Seasons

The Zhuoshui River alluvial fan is one of the most important groundwater and agricultural areas in Taiwan. Abundant resources are main source domestic water supply irrigation water. However, recharge quality have been greatly affected under extreme climate hydrological conditions. Hence, has a topic concern to public. In this study, level data from 2008 2020 were used divide wet dry season groups according sampling dates. An independent samples t-test was evaluate differences mean concentration between seasons. test results show that there no statistically significant difference This may result time lag effects recharge. Except for temperature, bicarbonate, total organic carbon (TOC), among concentrations other parameters Aquifer 1 2 terms location, although soil texture, land utilization, cropping systems, hydrogeology proximal, mid-, distal affect variations, it seems only by surface infiltration, resulting major ions, nitrate seasons, whereas less affected. At same time, owing geological conditions intensive cultivation fan, arsenic could represent high risk public’s health if as or area, whether season. Meanwhile, due global change uneven droughts floods, so-called “wet season” “dry obviously different those past. Compared with precipitation, be better indicator understanding variations quality.