SPATIAL - TEMPORAL VARIATION ANALYSIS FOR DROUGHT HAZARD AND RISK IN INDONESIA BY USING STANDARIZED PRECIPITATION INDEX METHOD (SPI

• Main Author: Agustinus Lazarus, Kevin
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/33670
• Institution: Institut Teknologi Bandung

Drought is the fourth-largest disaster in Indonesia until 2016 and drought frequencies predicted to continue increasing due to climate variability in the world. The purpose of this study was to determine variations in the level of risk of drought in Indonesia historically and the changes of drought risk based on risk of hazard and vulnerability drought. Standarized Precipitation Index (SPI) is calculated using data of precipitation climatology Global Precipitation Climate Center (GPCC) monthly for 40 years (1971-2010) to obtain the value of the index of drought / Drought Hazard Index (DHI) and mapped to a map of drought in the region Indonesia. Analysis of risk by creating a risk map obtained by calculating DHI and Drought Vulnerability Index (DVI). These results indicate that the presence of variations in the level of drought in Indonesia are likely to increase as evidenced by the increased variety of events, the frequency and extent of drought hazard class category in Indonesia. The correlation between the value of SPI with ONI index with a positive IOD showed a strong relationship with the indexes of drought, especially in the period 1991 - 2000. Drought risk in Indonesia has been increased temporally, especially on the class category moderate and high grade then it was allegedly associated with the increased frequency of ENSO and IOD. Furthermore, the areas that have highest escalation of drought risk are Java, Sumatera and Kalimantan in both the scale of short and long-term periods of drought. Drought risk transformation in Indonesia temporaly tends to increase, especially in the high-grade category and drought risk areas that tend to increase spatialy are Sumatera, Kalimantan, and Java.