Geologi dan Analisis Kualitas Air Tanah Pada Akuifer Vulkanik Daerah Kadudampit Kabupaten Sukabumi Jawa Barat

Abstract

The research was conducted in the Kadudampit area, Sukabumi Regency, West Java with the aim of knowing the rock units, geomorphological units, historical geology, and groundwater quality in the research area. The methodology used is divided into five (5) stages, namely the preliminary stage, the observation and field data collection stage, the data analysis stage and laboratory analysis, the studio stage, and the final report preparation stage. The research area is divided into 3 parts, namely the lava flow ridge unit, the pyroclastic ridge unit, and the volcanic foot plain unit. The research area consists of 3 (three) rock units with 2 different volcanoes, namely the basalt lava unit with Holocene age which is a product of the Pangrango Volcano, andesite lava units with a Holocene age are a product of the Pangrango Volcano, and pyroclastic breccias. with the Holocene age is a product of the Gede Volcano. Geological history began during the Holocene when the Pangrango Volcano erupted resulting in basalt lava freezing, then in Holocene Pangrango Volcano erupted again with the result of freezing andesite lava, in the same period of time, Gede Volcano erupted with the results of Pyroclastic Breccia with the Lapilli Tuff matrix which is deposited in the terrestrial environment. Analysis of groundwater quality is divided into 3 (three) parameters, namely Physics, Chemistry, and Microbiology, with the overall results of groundwater in the study area not suitable for drinking but for good household. Anion and cation analysis was conducted to determine the facies of the elemental content in the water with the results of water analysis in the research area having the type of Magnesium Bicarbonate. Analysis of groundwater flow in the study area was carried out with the aim of knowing the water infiltration area and the direction of water flow with the results of the analysis of 3 (three) seepage lines of water in basalt lava rock units.