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Dyah Respati Suryo Sumunar
Jurusan Pendidikan Geografi Universitas Negeri Yogyakarta
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Journal : Jurnal Geografi

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THE ESTIMATION OF FLOOD-AFFECTED AREA IN THE DOWNSTREAM OF CODE RIVER, YOGYAKARTA, INDONESIA Suhadi Purwantara; Arif Ashari; Dyah Respati Suryo Sumunar; Nurul Khotimah
JURNAL GEOGRAFI Vol 14, No 2 (2022): JURNAL GEOGRAFI
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jg.v14i2.34651

Abstract

The rapid development of settlements and sediment deposition has increasingly narrowed the drainage in the Code River. This condition causes floods and wider distribution of the affected areas. This research aims to estimate the maximum amount of rain, predict the probability of flood, and predict flood-prone areas in the Code River. Data were collected by observation, remote sensing image interpretations, literature studies, and documentation. Data analysis was performed using Log Pearson Type III for design rainfall analysis, Weibull formula for flood probability analysis, and rational method for planning maximum discharge analysis. Flood modeling is carried out by the iteration method. The results show: (1) the maximum amount of rain based on the calculated design rainfall with a return period of 5 to 40 years is R5 = 106.83 mm, R10 = 116.67 mm, R20 = 127.30 mm, R40 = 134.25 mm, (2) the probability of flood that is predicted from the maximum discharge caused by the design rainfall at each return period is Q5 = 82.45 m3/sec, Q10 = 89.42 m3/sec, Q20 = 96.95 m3/sec, Q40 = 101.86 m3/sec. (3) Inundation of the flood target area in the 5-year return period covers an area of 0.4456 km2, the 10-year return period covers 0.5209 km2, the 20-year return period covers 0.6023 km2, the 40-year return period covers 0.6555 km2. This paper presents information on the potential for a flood at various return periods to increase preparedness and reduce risks due to flood disasters.Keywords: Disaster, Floods, Estimated Flood-Affected Areas, Code River, Yogyakarta
Co-Authors - Nurhadi A. Ardiansyah Achmad Fadhilah Akalili Zafirah Syarafina Akhmad Ganang Hasib Akrom, Akrom Aminna Rahmawati Andika Surya Ardi Annisa Eka Nurul Aza arif ashari Aswasulasikin Ebni Sholikhah Etika Cahyani Etika cahyani Fekry Salim Hehanussa Heinrich Rakuasa Herman Dwi Surjono Khirjan Nahdi M. Kurniawan Arif Syaefulloh Maulana Azkaa S Mawanti Widyastuti Maya Eka S Mohd Hairy Ibrahim Nasir Nayan Nugraho Sistu Prabintoro Nursida Arif Nurul Khotimah Nurul Khotimah Nurul Khotimah NURUL KHOTIMAH Restu Widiatmono Riga Aditya Ariyanto Rukiyati Rukiyati Siti Irene Astuti Dwiningrum Siti Irene Dwiningrum Sri Agustin Sutrisnowati Sri Sumardiningsih Sriadi Setyawati Sriadi Setyawati Suhadi Purwantara Suparmini Suparmini Wahyu Nur Afrita Yusuf Susena