Analisis Indeks Kekeringan Menggunakan Standardized Precipitation Index (SPI) Method pada Daerah Kabupaten Timor Tengah Selatan

Due to the low rainfall, it is relatively uneven in each sub-district Timor Tengah Selatan (TTS) Regency. It causes some rivers be drought-prone dry season. This study aims determine largest drought index and map distribution South Central The analysis uses Standardized Precipitation Index (SPI) Method. data used monthly rainfall for ten years (2009-2018) of rain stations. Then, mapping using ArcGIS Software. results showed that 1-month deficit period, was -3.61, which occurred March 2014 at Oeekam Rain Station. In 3-month -3.19, 2010 Nulle Station November 2015 Kesetnana findings suggest during shortfall all sub-districts experienced January, February, April. Meanwhile, occurs evenly only June.