GROUNDWATER QUALITY AND INFILTRATION RATE IN CISARUA AREA AND ITS SURROUNDINGS, WEST BANDUNG REGENCY, WEST JAVA

• Main Author: Herliana, Rina
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/82092
• Institution: Institut Teknologi Bandung

The research area exhibits high groundwater use; however, the groundwater quality has not been well characterized. This study aims to assess the physical and chemical parameters of groundwater using standards for drinking and irrigation waters. Infiltration tests were also carried out to estimate hydraulic conductivity based on the type of soil and land use. Analysis of the physical and chemical properties of groundwater was conducted at nine springs, ten dug wells, and 27 boreholes. Laboratory testing using Ion Chromatography was performed on ten groundwater samples. The results indicated that groundwater temperatures range between 22.3 and 29.4 °C, with pH values from 5.83 to 8.02, total dissolved solids (TDS) from 86 to 317 mg/L, and electrical conductivity from 130 to 481 ?S/cm. Nitrate concentrations (17.28- 228.96 mg/L) exceeding the regulatory standards suggest groundwater contamination from anthropogenic activities such as agriculture and septic tank leaks. Hydrochemical analysis identified three groundwater facies: Ca/Mg-HCO3, Ca/Mg-Cl/SO4, and Ca-mixed. Based on NA%, SAR, and the Wilcox Diagram, all groundwater samples were suitable for irrigation except at one location (SB-18). The analysis of infiltration rates yields average hydraulic conductivity values of 3.91×10-5 cm/s for volcanic breccia, 7.7×10-4 cm/s for lava, 1.46×10-3 cm/s for tuff, and 3.8×10-3 cm/s for scoria tuff. The distribution of infiltration rates indicates that agricultural areas have higher infiltration rates than residential areas.