Azhaara, Rizqa (2025) Analisis Banjir dan Upaya Normalisasi Kali Buntung, Kabupaten Sidoarjo, Jawa Timur. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kali Buntung merupakan salah satu anak sungai dari Sungai Brantas yang terletak di Kecamatan Waru, Kabupaten Sidoarjo, Provinsi Jawa Timur. Kecamatan Waru sendiri termasuk dalam kawasan dengan tingkat rawan untuk bencana banjir. Selain faktor letak geografis, perilaku masyarakat sekitar juga sangat berpengaruh untuk kelancaran alur sungai. Menghambatnya aliran sungai banyak disebabkan oleh menumpuknya sampah warga di sekitar kawasan Kali Buntung. Selain pembuangan sampah, perilaku masyarakat seperti menggunakan daerah sekitar sungai untuk lahan pemukiman juga mengakibatkan terhambatnya aliran sungai. Oleh karena itu, perlu dilakukan upaya untuk menanggulangi bencana banjir dan terhambatnya aliran Kali Buntung ini. Tujuan dari penelitian ini adalah untuk memperoleh pemodelan penampang sungai di Kali Buntung untuk upaya normalisasi. Analisis hidrologi dilakukan menggunakan metode Polygon Thiessen untuk menentukan curah hujan wilayah, diikuti dengan analisis frekuensi. Hasil menunjukkan bahwa curah hujan maksimum rencana untuk periode ulang 2 tahun, 5 tahun, 10 tahun, 25 tahun, 50 tahun, dan 100 tahun masing-masing adalah 85,04 mm, 112,27 mm, 126,59 mm, 140,88 mm, 149,60 mm, dan 156,74 mm. Pemodelan kondisi eksisting menggunakan software HEC-RAS. Hasil analisis menunjukkan bahwa sebagian besar penampang eksisting tidak mampu menampung debit banjir rencana sebesar 296,285 m3/s. Oleh karena itu, perencanaan dilakukan normalisasi dengan dua jenis penampang baru: penampang persegi panjang menggunakan sheet pile dan penampang trapesium dengan tanggul. Desain penampang baru terbukti mampu menampung debit banjir rencana secara optimal. =======================================================================================================================================
Buntung River is one of the tributaries of the Brantas River located in Waru District, Sidoarjo Regency, East Java Province. Waru District is considered a flood-prone area. In addition to geographical factors, community behavior also significantly influences the smooth flow of the river. The obstruction of river flow is largely caused by the accumulation of household waste around the Buntung River area. Besides waste disposal, the use of riverbanks for residential areas by the local community further hinders the river flow. Therefore, efforts are needed to address the flood problem and restore the flow capacity of Buntung River. The objective of this study is to develop a cross-sectional model of the Buntung River as part of normalization efforts. Hydrological analysis was carried out using the Polygon Thiessen method to determine the regional rainfall, followed by frequency analysis. The results showed that the design rainfall for return periods of 2, 5, 10, 25, 50, and 100 years are 85.04 mm, 112.27 mm, 126.59 mm, 140.88 mm, 149.60 mm, and 156.74 mm, respectively. The existing river condition was modeled using HEC-RAS software. The analysis revealed that most of the existing cross-sections are unable to accommodate the design flood discharge of 296.285 m³/s. Therefore, a normalization plan was designed using two types of new cross-sections: rectangular sections with sheet piles and trapezoidal sections with embankments. The new designs were proven to effectively accommodate the design flood discharge.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Flood, Flow, River, Buntung River, HEC-RAS, Banjir, Aliran, Sungai, Kali Buntung, HEC-RAS. |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. G Geography. Anthropology. Recreation > GB Physical geography > GB1399.9 Floods T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs T Technology > TC Hydraulic engineering. Ocean engineering > TC530 Flood control |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Rizqa Azhaara |
| Date Deposited: | 28 Jul 2025 03:18 |
| Last Modified: | 28 Jul 2025 03:18 |
| URI: | http://repository.its.ac.id/id/eprint/121852 |
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