Abstrak Telah dilakukan analisis pola dan distribusi hujan berdasarkan ketinggian tempat di pulau Flores. Data rata-rata bulanan untuk mendapatkan pola curah hujan, data curah hujan harian ke dasarian untuk mendapatkan data curah hujan dan data periode curah hujan selama musim hujan. Penelitian ini menggunakan software Geographic Information System (GIS) untuk membuat peta distribusi curah hujan dan di analisis menggunakan metode Rancangan Acak Lengkap (RAL) untuk mendeteksi perbedaan nilai tengah variabel pengamatan pada elevasi yang berbeda. Berdasarkan grafik pola hujan yang ada di pulau Flores adalah pola hujan monsunal. Hasil dari perhitungan menggunakan RAL, diperoleh nilai populasi pengamatan P1 pada ketinggian tempat (0-300 m dpl) dengan curah hujan rata-rata 851,75 mm dan periode musim hujan rata-rata 10,50 dasarian. P2 pada ketinggian tempat (301-600 m dpl) memiliki curah hujan rata-rata 1367,75 mm dan periode musimhujan rata-rata 13,75 dasarian. P3 pada ketinggian tempat (601-900 m dpl) memiliki curah hujan rata-rata 1875,25 mm dan periode musim hujan rata-rata 15,75 dasarian. P4 pada ketinggian tempat (901-1200 m dpl) memiliki curah hujan rata-rata 3164,50 mm dan periode musim hujan rata-rata 22,25 dasarian. Hal ini menunjukan ketinggian tempat memiliki pengaruh terhadap curah hujan dan periode musim hujan di pulau Flores.Kata Kunci: Pola hujan; curah hujan; periode musim hujan; Geographic Information System (GIS); Rancangan Acak Lengkap (RAL). Abstract An analysis of rainfall patterns and distribution based on altitude on the island of Flores has been done. Monthly average data to get rainfall patterns, daily to basic rainfall data to get rainfall data, and rainfall period data during the rainy season. This study used Geographic Information System (GIS) software to create rainfall distribution maps and is analyzed using the Completely Randomized Design (CRD) method to detect differences in mean values of observational variables at different elevations. Based on a chart of rain patterns on Flores island is a monsoonal rain pattern. The results of calculations using RAL, observational population obtained values P1 at altitude (0-300 m asl) with an average rainfall of 851.75 mm and an average rainy season period of 10.50 dasarian. P2 at altitude (301-600 m asl) has an average rainfall of 1367.75 mm and an average rainy season period of 13.75 dasarian. P3 at altitude (601-900 m above sea level) has an average rainfall of 1875.25 mm and an average rainy season period of 15.75 dasarian. P4 at altitude (901-1200 m asl) has an average rainfall of 3164.50 mm and an average rainy season period of 22.25 dasarian. This shows that altitude has an influence on rainfall and the rainy season period on Flores Island. Keywords: Rain patterns; rainfall, periods of the rainy season; Geographic Information System (GIS); Completely Randomized Design (CRD).
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