Regression Analysis of Strong El-Nino and La-Nina Periode to Groundwater Availability in Palembang City

Abstract

El-Nino results in reduced air mass in most parts of Indonesia and can cause drought. In the La-Nina phase some parts of Indonesia will get more water vapor resulting in increased frequency of rain. Increased rainfall has an impact on groundwater availability. Groundwater availability illustrates the condition of water in the soil which is useful in many sectors of life, especially in the agricultural sector. This study aims to see the relationship between the El Nino and La Nina phenomena strongly by using SOI indicators on groundwater availability in Palembang. In the Strong El-Nino phase in 1994 and 1997 the SOI variable had a weak correlation with groundwater availability variable of 0.32 and 0.39. In 2015 the correlation of SOI variable to groundwater avability was 0.79 indicating a strong corellation. In 2008 and 2011 which was a strong La-Nina phase the SOI index correlation value for groundwater availability was 0.46 and 0.45, respectively, which indicated a moderate correlation.