Perencanaan Bendung Tetap Untuk Jaringan Irigasi Gemarang Kecamatan Kedunggalar Kabupaten Ngawi

Manahan, Eric Thomas and Afandi, Haekal Rizky (2015) Perencanaan Bendung Tetap Untuk Jaringan Irigasi Gemarang Kecamatan Kedunggalar Kabupaten Ngawi. Diploma thesis, Institut Technology Sepuluh Nopember.

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Abstract

Bendung Gemarang terletak di Kali Soko Bawah desa Gemarang kecamatan Kedunggalar kabupaten Ngawi. Air dari Bendung Gemarang ini digunakan untuk mencukupi kebutuhan air jaringan irigasi (JI) Gemarang dengan sawah seluas 30 Ha. Perencanaan bendung didasarkan pada debit banjir rencana dengan periode ulang 50 tahun (Q50). Debit rencana menggunakan data curah hujan 20 tahun dari 3 (tiga) stasiun curah hujan. Hujan rata – rata ditentukan dengan metode Thiessen Polygon dan hujan rencana dengan Gumbel serta dengan metode Nakayasu didapat Q50 sebesar 61.056 m3/det. Berdasarkan Q50 kondisi geografi dan geologi didapatkan dimensi bendung : lebar total bendung (B) yaitu 17 meter dan tinggi bendung 3 meter dengan elevasi mercu bendung +77. Mercu bendung tipe bulat, kolam olak direncanakan tipe bak tenggelam dengan jari – jari 4,5 m. Dari analisis stabilitas tubuh bendung dalam kondisi stabil terhadap geser, guling, erosi bawah tanah (piping), retak dan bangunan tidak turun. ========================================================================================================== Gemarang weir located in Soko Bawah river the village of Gemarang district of Kedunggalar. Water from Gemarang weir is used for meet the water needs of irrigation areas Gemarang with rice acreage of 30 ha. Design based on the dam flood discharge plan with a return period of 50 years (Q50). Discharge plan using rainfall data series of 20 years of 3 (three) of rainfall stations. The average rainfall is determined by Thiessen Polygon method, rain plans to Normal Method and the method of Nakayasu Q50 obtained 61.056 m3/sec. Based on the Q50 the geography and geology obtained weir dimensions : total width of the weir (B) is 17 meters and high is 3 meters with top elevation weir +77. Top weir planned summit round type, and the pool planned Sub Merged Bucket type, with radius of circle 4,5 m. From the analysis of the stability the dam in stable condition against sliding, rolling, underground erosion (piping), crack and the building does not go down.

Item Type: Thesis (Diploma)
Additional Information: RSS 627.8 Man p
Uncontrolled Keywords: Bendung Gemarang, analisa hidrologi, stabilitas
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs
T Technology > TE Highway engineering. Roads and pavements > TE215 Drainage
Divisions: Faculty of Civil Engineering and Planning > Civil Engineering > 22401-(D3) Diploma 3
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 18 Jun 2019 04:20
Last Modified: 18 Jun 2019 04:20
URI: http://repository.its.ac.id/id/eprint/63147

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