KARAKTERISASI AKUIFER KARST MATAAIR NGELENG DENGAN PENDEKATAN VARIASI TEMPORAL SIFAT ALIRAN DAN HIDROGEOKIMIA
Flow properties and hydrogeochemistry is the main approach in this study. The purpose of thisstudy was to determine the temporal variation of the Ngeleng Spring karst aquifer flow properties,examines the temporal variation of Ngeleng Spring karst aquifers hydrogeochemistry, and to studythe relationship between the flow properties and hydrogeochemistry of Ngeleng Spring. Researchmethod in this study classified as a field survey using data such as water level, discharge, and waterchemical contents. Sampling was divided into long-term sampling and flood event sampling. Theanalysis that used in this study is a graphical analysis, scatter plot analysis, and descriptiveanalysis. The results of recession constant analysis stated that the flow component of Ngelengsprings dominated by diffuse component. Determination between flow properties andhydrogeochemistry states that on rainy season occured rain water mixing process, then on dryseason occur the domination of water interaction with the aquifer material, as well as the diffusiontransfer process because of the spring open system. Calcite aggressivity on rainy season are tendsto the unsaturated phase, while in the dry season tends to the equilibrium phase.