The Distribution of Rainwater Acidity in Bandung

Abstract

Acidity value (pH value) of rainwater, are influenced by the concentration of anions and cations dissolved in rainwater and it was also influenced by several sources of pollutants emitted into the atmosphere. This research was conducted to determine the sources of pollutants that affect the pH value in Bandung. Sampling locations were conducted in 10 locations, both in Bandung City and Regency. We used data monthly averages of pH value from 2006 - 2015, to see the distribution of pH values in Bandung. As for knowing the effect of pollutant sources that affect the pH value, Cipedes area was chosen to represent urban areas from the sampling location. We used data anion and cation concentrations of SO42-, NO3-, Cl-, NH4+, Na+ and Ca2+ in 2006 - 2015. The statistical method used for data process was PCA method. Result shows that pH value in Bandung fluctuated from 2006-2015, with the lowest average pH value in 2010 and 2014 was 5.2. From result of data processing with PCA gained 3 factors influencing pH value Bandung, which were Factor 1: SO42-, NO3-, K+ and Mg2+, Factor 2: Ca2+, and NH4+, Factor 3: Cl- and Na+.