Wahyuni, Sri and Ir. Moh. Sholichin, MT., Ph.D. IPU and Ir. Anggara Wiyono Wit Saputra, ST., M.Tech., Ph.D., IPM., ASEAN (2023) Studi Rehabilitasi Bendung untuk Kebutuhan Air Irigasi pada D.I Gumbasa Kabupaten Sigi, Provinsi Sulawesi Tengah. Sarjana thesis, Universitas Brawijaya.
Abstract
Kawasan irigasi Gumbasa ada di Kabupaten Sigi Provinsi Sulawesi tengah yang daerah layanannya mencakup Kota Palu dan Kabupaten Sigi. Bendung Gumbasa dibangun pada tahun 1931 hanya berupa free intake dan setelah 45 tahun kemudian Departemen Pekerjaan Umum membangun Bendung Gumbasa menjadi bendung permanen (tetap). Berdasarkan pada Permen PUPR Nomor 14 Tahun 2015, DI Gumbasa menjadi kewenangan pusat dikarenakan memiliki luasan yang terdiri atas 4.731 ha luasan fungsional, 9.796 ha luas potensial dan 10.978 ha luas baku. Tsunami dan gempa bumi yang terjadi di daerah Sulawesi Tengah yang meliputi Kota Palu, Kabupaten Sigi, Kabupaten Donggala, serta wilayah sekitarnya pada tanggal 28 September 2018 berdampak pada kerusakan Bendung Gumbasa. Studi ini bertujuan untuk memperoleh dimensi Bendung Gumbasa serta stabilitas bendung yang aman terhadap kondisi daerah studi. Studi terdiri dari beberapa kajian yakni analisa hidrologi, analisa neraca air, perencanaan dimensi bangunan utama Bendung Gumbasa serta analisa stabilitas bendung. Hasil studi menunjukkan dimensi bendung yang sesuai kondisi daerah studi yakni tinggi bendung sebesar 3,64 m, lebar efektif bendung 67,248 m, mercu bendung tipe OGEE III, elevasi mercu bendung +92,400 m, dengan peredam energi USBR IV, lebar kantong lumpur sebesar 21,992 m, panjang kantong lumpur sebesar 261,706 m, serta volume kantong lumpur sebesar 3396,334 m3. Hasil analisa stabilitas bendung bisa dipahami bahwasanya desain saluran pelimpah terlindung dari terguling, longsor, dan gempa bumi dalam segala situasi. Sehingga bendungan ini layak dibangun.
English Abstract
The Gumbasa irrigation area is in Sigi Regency, Central Sulawesi Province, whose service area includes Palu City and Sigi Regency. The Gumbasa Dam was built in 1931 only in the form of free intakes and after 45 years the Public Works Department built the Gumbasa Dam into a permanent (fixed) weir. Based on PUPR Regulation Number 14 of 2015, DI Gumbasa is the central authority because it has an area consisting of 4.731 ha of functional area, 9.796 ha of potential area and 10.978 ha of standard area. The tsunami and earthquake that occurred in the Central Sulawesi area which includes Palu City, Sigi Regency, Donggala Regency, and surrounding areas on September 28, 2018 had an impact on the damage to the Gumbasa Dam. This study aims to obtain the dimensions of the Gumbasa Weir as well as the stability of the weir that is safe against the conditions of the study area. The study consists of several studies, namely hydrological analysis, water balance analysis, dimensional planning of the main building of the Gumbasa Dam and weir stability analysis. The results showed the dimensions of the weir according to the conditions of the study area, namely the height of the weir of 3.64 m, the effective width of the weir of 67.248 m, the type OGEE III weir landmark, the elevation of the weir +92.400 m, with USBR IV energy dampers, the width of the mud bag of 21.992 m, the length of the mud bag of 261,706 m, and the volume of the mud bag of 3396,334 m3. The results of the weir stability analysis can be understood that the spillway design is protected from rollovers, landslides, and earthquakes in all situations. So, this dam is worth building.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 052307 |
| Uncontrolled Keywords: | Rehabilitasi, Irigasi, Dimensi Bendung, Analisa Stabilitas- rehabilitation, irrigation, weir dimensions, stability analysis |
| Divisions: | Fakultas Teknik > Teknik Pengairan |
| Depositing User: | Emy Sukartini |
| Date Deposited: | 22 Jan 2024 06:14 |
| Last Modified: | 22 Jan 2024 06:14 |
| URI: | http://repository.ub.ac.id/id/eprint/213027 |
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