This book delves into the complex geochemical and hydrological processes that govern water quality in a subterranean, freshwater ecosystem. It contains a comprehensive data compilation of in-situ measurements and water chemistry analyses conducted over multiple years. The authors employ various statistical techniques to understand the spatial and temporal variability of the system and identify patterns and trends in water quality parameters. By examining the influence of environmental factors on these parameters, the book contributes to a better understanding of groundwater vulnerability and the impact of human activities on water resources. It also highlights the significance of long-term data collection and analysis in assessing water quality trends and ensuring water resource sustainability.