KAJIAN PENANGANAN BANJIR SUNGAI ANAFRE DI KOTA JAYAPURA

Authors

  • Fanny Tendean
  • Suhardjono Suhardjono
  • Emma Yuliani

Abstract

Abstrak: Sungai Anafre terletak di kota Jayapura. Luas daerah pengaliran sungai (DPS) sungai Anafre mencapai ±11,68 km2, dengan panjang sungai ±3,63 km. Kemiringan dasar sungai relatif curam, sering terjadi luapan pada musim hujan. Tingkat aktifitas di kawasan ini sangat tinggi. Maksud dari studi ini adalah mengetahui daerah-daerah mana saja yang menggalami banjir pada kala ulang debit 25 tahun dan 50 tahun kemudian dilakukan analisa perhitungan untuk mengetahui alternatif apa saja yang memungkinkan secara tepat dari segi teknis dan ekonomis. Metode yang digunakan dalam penelitian ini adalah analisa kondisi eksisting sungai Anafre sehingga dapat diketahui titik-titik banjir, kemudian dilakukan normalisasi dengan perbandingan alternatif memperlebar, peninggian tanggul dan kombinasi (memperlebar dan peninggian tanggul). Berdasarkan hasil perhitungan diperoleh 16 titik daerah banjir pada kala ulang debit 25 tahun dan 19 titik daerah banjir pada kala ulang 50 tahun dari 61 titik saluran eksisting sungai Anafre. Secara teknis serta ekonomis terpilihlah alternatif 3 (kombinasi).

Kata kunci: Banjir, Sungai Anafre, Normalisasi, Teknis dan Ekonomis

 

Abstract:  The Anafre River is located in the city of Jayapura. The catchment area of the Anafre River reaches ± 11.68 km2, and the river length is ± 3.63 km. Its river bottom is relatively steep and the river often overflows during the rainy season. This area has a very high level of activity. The aim of this study is to determine which areas are flooded on a discharge return period of 25 and 50 years and to analyze the best alternatives from technical and economic standpoints. This study analyzes the existing condition of the Anafre River to recognize flooded areas and compares widening, embankment elevation, and combinations of both as normalization alternatives. Calculations show that there were 16 flooded areas on a return period of 25 years and 19 flooded areas on a return period of 50 years, from 61 existing Anafre river channels. Third alternatives were selected (combination).

Keywords: Flood, Anafre River, Normalization, Technically and Economically

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Published

2016-09-07

How to Cite

Tendean, F., Suhardjono, S., & Yuliani, E. (2016). KAJIAN PENANGANAN BANJIR SUNGAI ANAFRE DI KOTA JAYAPURA. Jurnal Teknik Pengairan: Journal of Water Resources Engineering, 6(2), pp. 175 – 185. Retrieved from https://jurnalpengairan.ub.ac.id/index.php/jtp/article/view/264

Issue

Vol. 6 No. 2 (2015)

Section

Articles

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