Penanganan Kerusakan Sungai Lusi Kabupaten Grobogan Jawa Tengah Akibat Banjir dan Erosi Pada Lereng Sungai: Penanganan Kerusakan Sungai Lusi Kabupaten Grobogan Jawa Tengah Akibat Banjir dan Erosi Pada Lereng Sungai

Aan Andriawan; Aan Andriawan Andriawan; Aan Andriawan ANDRIAWAN

Authors

Aan Andriawan Universitas Internasional Batam
Aan Andriawan Andriawan Universitas Muhammadiyah Purwokerto
Aan Andriawan ANDRIAWAN Universitas Muhammadiyah Purwokerto

Keywords:

Sungai, :Penanggulangan banjir, Longsor, Grobongan

Abstract

ABSTRACT

Jratunseluna river area is 9,576.01 km² wide crossing 10 regencies and 2 cities, one of which is Grobogan Regency. The River System in Jratunseluna river area consists of 4 systems: Semarang Barat, Dolok-Panggaron, Jragung-Tuntang, and Serang Lusi Juana (Seluna). There are 2 (two) main riversi in the Seluna River system: Lusi and Serang Rivers, both of which cross Blora, Grobogan, Kudus, and Demak Regencies. The research was conducted in Lusi Rivershed (DAS) in Klaten Hamlet, Ngaringan Village, Ngawen Sub District, Grobogan Regency. This research aims to find out physical condition of Lusi River, inundation height, total discharge, and inundation area on the existing cross-section of Lusi River and to find out safety factor in strengthening Lusi River slope. River gydrolic analysis was conducted based in direct procedure with software HEC-RAS version 5.0 help and the method used in the analysis was slope stability with Bishop’s wedge method. The result of field survey shows that river bank damage occurs in Lusi Rivershed due to flood, erosion, and condition of land proning to landslide in the riverbed. Meanwhile, the result of analysis using HEC RAS 5.0 with plan discharge Q 10 years shows inundatio heigh of 1.10 m, and total discharge/ total Q of 450.34 m³/s, and for the inundation area of 1478.35 m² and safety factor value in strengthening Lusi River slope using gabions in Klaten Village, Ngaringan, Wirosari, Grobogan, Central Java, the value of 1.2787 was found without gabions, 1.3115 with gabions, and 1.3800 for alternative gabion 3.

Keywords: River, flood and landslide managemen

References

Anonim, 2015, Permen PUPR No 04/PRT/M/2015, Daerah Aliran Sungai, Kementerian Pekerjaan Umum dan Perumahan Rakyat, Jakarta.

Anonim, 2015, Permen PUPR No 28 Tahun 2015, Tentang Penetapan Garis Sempadan Sungai dan Garis Sempadan Danau , Kementerian Pekerjaan Umum dan Perumahan Rakyat, Jakarta

Andi Aghir A. Lanyala, 2016, Prediksi Laju Erosi Pada Penggunaan Lahan Berbeda di Daerah Aliran Sungai (DAS) Kawatuna Provinsi Sulawesi Tengah, Volume 4 (6) Desember 2016

Ichsan Saputra, 2015, Kajian Hidrologi dan Analisa Kapasitas Tampang Sungai Krueng Langsa Berbasis HeC-HMS dan HEC-RAS, Jurnal Teknik Sipil Unaya Volume 1 Nomor 1, Januari 2015

Harri A. Setiadi, 2013, Identifikasi Kerusakan Bangunan dan Fungsi Infrastruktur Akibat Banjir Citarum di Wilayah Kabupaten Bandung, Volume 1 - 14 , Februari 20

Meliyana, dkk, 2018, Studi Penanggulangan Banjir Krueng Tripa. Jurnal Teknik Sipil Unaya. Vol. 4, No. 1, Januari 2018: 34-39

Syahputra, I. (2015). Kajian hidrologi dan analisa kapasitas tampang Sungai Krueng Langsa berbasis HEC-HMS dan HEC-RAS. Jurnal Teknik Sipil Unaya, 1(1), 15-28.

Quirogaa, V. M., Kurea, S., Udoa, K., & Manoa, A. 2016. Application of 2D numerical simulation for the analysis of the February 2014 Bolivian Amazonia flood: Application of the new HEC-RAS version 5. Ribagua, 3(1), 25-33.