KARAKTERISTIK PERIODE ULANG CURAH HUJAN TINGGI DENGAN METODE IWAI KADOYA DI KOTA JAMBI

Irwan, Adi Syahputra (2024) KARAKTERISTIK PERIODE ULANG CURAH HUJAN TINGGI DENGAN METODE IWAI KADOYA DI KOTA JAMBI. Undergraduate Thesis thesis, Institut Teknologi Telkom Purwokerto.

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Abstract

Indonesia, which is located between two continents (Asia and Australia) and flanked by two oceans (the Indian and the Pacific), has most of its territory consisting of sea, with large and small mountainous islands. This situation produces a variety of climates due to the complex geographical location and topography. The island of Sumatra, part of Indonesia, experiences high rainfall, especially in Jambi Province, influenced by factors such as mountains, the Indian Ocean, the Strait of Malacca, the Java Sea, the Karimata Strait, and proximity to the South China Sea. Sumatra Island is located in the western part of Indonesia, located between 0.45° - 2.45° South Latitude and between 101.10° - 104.55° East Longitude, stretching to a height of 125 meters above sea level. This causes the Sumatra region to have high rainfall, this is caused by the west monsoon which originates from the Indian Ocean and the South China Sea which passes through the western part of Indonesia. The island of Sumatra is divided into three large parts which have different regional topography and types of rainfall, so that the characteristics of rainfall on the island of Sumatra are different in each region. High rainfall results in natural disasters, to reduce the impact of disaster mitigation, the rain return period is also used to estimate the time needed to resume maximum rainfall. In this study, the rainfall return period was calculated at the Sultan Thaha Jambi Class I Meteorological Station. The results of the research show that 375.86 mm of rainfall will occur within a 2 year return period, for a 5 year return period the rainfall will be around 412.68 mm, for a 10 year return period the rainfall will be around 434.93 mm, and for a 20 year return period year, the maximum rainfall that will occur is 455.06 mm, this value is considered significant considering the location of the city of Jambi which is in the East of Jambi Province, and is divided by the Batanghari River. Keywords: Rainfall, Iwai kadoya, Maximum rainfall characteristics, Condensation, Return period.

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