Jurnal Fisika dan Terapannya (2020) Vol. 7 (1): 68-77 JURNAL FISIKA DAN TERAPANNYA p-ISSN: 2302-1497, e-ISSN: 2715-2774 http://journal.uin-alauddin.ac.id/index.php/jft JFT | 68 MODEL NON LINEAR KEJADIAN CURAH HUJAN EKSTRIM DI KOTA PALU MENGGUNAKAN PROGRAM JAVA Sitti Nurrahmi 1 , Dedy Farhamsa 2 , dan Iqbal 2 1 Jurusan Fisika, Fakultas Sains dan Teknologi, Universitas Islam Negeri Alauddin Makassar 2 Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tadulako, Palu email: sitti.nurrahmi@uin-alauddin.ac.id 1 sitti.nurrahmi@uin-alauin.ac.id INFO ARTIKEL Status artikel: Diterima: 13 Juni 2020 Disetujui: 29 Juni 2020 Tersedia online: 30 Juni 2020 Keywords: Rainfall Models, Extreme Rainfall Event, Jawa Programming. ABSTRACT Weathers and climates are the main factors that affected the various activities of life. The increasing of human activity has made the change in environment biophysics components, which are major contributors about climate change. The most important of the climate change process are the emergence of extreme events, for example extreme rainfall events, that the rainfall have more than 50 mm intensity / day. To know characteristic of climate change occur, needed a model that represented the rainfall data in various meteorology station. Based on it, author make a modeling the extreme rainfall in Palu city using Java programming. The results of the extreme rainfall events that predictions in 10 years using software models and Java programming, in Palu city with using fourier series function order 5 with RSqure value 0,79, predicted the extreme rainfall will likely increase every year with the highest event are 2 times/years. The prediction was featuring the precise value with the real data. So, we can conclude that the extreme rainfall model tends to be accurate and can be used to predict the extreme rainfall in Palu city and in other cities . 1. PENDAHULUAN Cuaca dan iklim merupakan faktor utama yang sangat berpengaruh terhadap berbagai aktifitas kehidupan. Aktifitas manusia yang makin meningkat menjadikan timbulnya perubahan pada komponen biofisik lingkungan, seperti peningkatan konsentrasi gas-gas rumah kaca di atmosfir, yang merupakan penyumbang utama terjadinya pemanasan dan perubahan iklim. Akibat yang paling penting dari proses perubahan iklim adalah timbulnya peristiwa ekstrim. Pada umumnya timbulnya peristiwa ekstrim diasosiasikan dengan terjadinya