Analisis Tren Frekuensi Banjir Kali Mriwong

Anggara Apriyan Pradana(1*), Ellyta Anggraini(2), Mahendra Ken Pambayun(3), Fuad Muhammad(4), Agus Hari Wahyudi(5)
(1) Magister Ilmu Lingkungan, Sekolah Pascasarjana, Universitas Diponegoro, Semarang, Indonesia
(2) Dinas Pekerjaan Umum, Perumahan dan Kawasan Permukiman, Jawa Timur, Indonesia
(3) Kantor Pertanahan Kabupaten Tanjung Jabung Timur, Kementerian Agraria dan Tata Ruang/Badan Pertanahan Nasional
(4) Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro, Jalan Prof. Soedarto, SH, Semarang, Indonesia 50275
(5) Departemen Teknik Sipil, Fakultas Teknik, Universitas Sebelas Maret, Surakarta, Indonesia
(*) Corresponding Author
Abstract
Abstract. Sustainable development adheres to the principle of intergenerational justice. Floods are the most destructive global disasters on a geographical scale. Land use changes and increasing population growth result in the distrution of locations for storing water. Land use changes contribute to the increasing flood disaster. The human population living in flood-prone areas feels the impact of increasingly severe material and health losses. Pulung District is an area with high rainfall in Ponorogo Regency, East Java, Indonesia. Mriwong utilized for irrigation. The development of agriculture in the catchment area of Mriwong River affects the discharge continuity. Throughout 2020, 12 flood disasters and 1 drought were recorded. The intent of this research is to analyze the flood threshold and trend analysis of Mriwong River Flood Frequency. The methods used are percentile analysis and trend analysis. The data utilized are Mriwong River discharges 2014 to 2020. The research results show that the appropriate flood threshold for Mriwong River is Q95. Then, an increasing trend of flood frequency was detected in March, and a decreasing trend occurred in April. The increase and decrease of flood frequency trends is an early indication of rainy season change. Therefore, flood management in Ponorogo Regency needs to consider comprehensive research on rainfall. The flood early warning system management in Ponorogo Regency required analyzing the flood threshold at other discharge monitoring stations (Cokromenggalan, Wilangan, Gendol, Ngebel, Kedung Celeng, Watu Putih, Galok, and Sungkur). Suggestions for further research: It is necessary to try other types of equations in analyzing R2 to find the best equation model that represents the trend of flood frequency in Ponorogo Regency.
Submitted: 2024-11-28 Revisions: 2025-03-12 Accepted: 2025-06-20 Published: 2025-08-08
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