AbstrakKota Ambon merupakan ibukota Provinsi Maluku yang berada di kawasan timur Indonesia. Kota Ambon memiliki intensitas curah hujan yang relatif tinggi dan cenderung berubah-ubah setiap tahun. Informasi tentang curah hujan sangat penting bagi masyarakat Kota Ambon untuk merencanakan kehidupan mereka dan deteksi dini terhadap bencana yang diakibatkan oleh curah hujan ekstrim. Tujuan penelitian ini adalah menentukan model terbaik untuk curah hujan bulanan di Kota Ambon dan meramalkan curah hujan untuk beberapa periode ke depan. Data yang digunakan adalah data curah hujan bulanan di kota Ambon pada periode Januari 2005 -Desember 2013 yang berasal dari hasil pengamatan Stasiun Geofisika -BMKG Ambon. Penelitian ini menggunakan analisis time series yakni metode Box-Jenkins untuk pemodelan SARIMA. Hasil yang diperoleh adalah model ( )( ) ( ) yang memiliki nilai SSR, AIC, SBC/BIC, dan terkecil. AbstractAmbon city, the capital of Maluku Province, is located in eastern Indonesia. Ambon city has relatively high rainfall intensity and it fluctuated every year. Information about rainfall is very important for the people in Ambon to plan their life and to detect disasters. The purpose of this study is to determine the best model of monthly rainfall in Ambon City and to forecast rainfall for several periods. The study used monthly rainfall data in Ambon city, from January 2005 until December 2013, which came from observation of Geophysics Station -BMKG Ambon. The method for this study is Box-Jenkins for SARIMA modeling. The result of this study is ( )( ) ( ) which had the smallest value of SSR, AIC, SBC/BIC, MAPE and RMSE.
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