Perencanaan Alternatif Bangunan Pelimpah (Spillway) Bendungan Blega Kabupaten Bangkalan Madura

Syam, Nurul Fajrin (2009) Perencanaan Alternatif Bangunan Pelimpah (Spillway) Bendungan Blega Kabupaten Bangkalan Madura. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kabupaten Bangkalan, Madura, memiliki potensi sumber daya air permukaan yang bagus seperti Sungai Blega. Namun, bangunan sarana penunjang pemanfaatan sumber daya air yang ada masih perlu ditingkatkan lagi. Di samping terjadinya banjir pada musim penghujan dan hampir kering pada musim kemarau. Inilah yang mendasari pembangunan Bendungan Blega. Terdapat 4 stasiun hujan yang berpengaruh pada DAS Blega, yaitu stasiun Galis di Kecamatan Galis, Geger di Kecamatan Geger, Dupok di Kecamatan Dupok dan Konang di Kecamatan Konang. Keempat stasiun tersebut terletak di Kabupaten Bangkalan. Luas DAS Bendungan Blega adalah seluas 122 km² dengan total panjang sungai sepanjang ± 23 km. Dari hasil perhitungan perencanaan dengan menggunakan debit rencana 1000 tahun (Q₁₀₀₀) sebesar 746,92 m³/dt didapatkan dimensi Spillway dengan lebar sebesar 19 m, elevasi puncak Spillway terletak pada ± 50,50 dengan dasar waduk terletak pada ± 46,50, elevasi puncak Tubuh Bendung terletak pada ± 56,00. Untuk perencanaan kolam olak dipakai kolam olak USBR tipe II dengan panjang kolam olak sebesar 57,50 m. Dari perencanaan didapatkan dimensi Spillway kemudian dilakukan perhitungan stabilitas terhadap guling, geser dan penurunan. Perhitungan kestabilan dihitung pada saat kondisi paling kritis, yaitu pada saat kondisi muka air setinggi puncak Spillway dan pada saat kondisi muka air setinggi debit banjir rencana. Dari hasil perhitungan kestabilan didapat kesimpulan bahwa kestabilan Spillway memenuhi syarat.
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Bangkalan District, Madura, has potential water resources such as Blega River. But some water resources infrastructure need more improve. Flood at rainy season and lack of water at dry season because the main reason why Blega Dam need to build. There is 4 rain station that influenced to Blega watershed, namely: Galis rain station at Galis regency, Geger rain station at Geger regency, Dupok rain station at Dupok regency, and Konang rain station at Konang regency. Four rain station is located at Bangkalan district. Blega Dam has 122 km² catchment area with total river length ± 23 km. By using design flood 1000 years (Q₁₀₀₀) 746.92 m³/dt is obtained spillway width 19 meter, elevation of crest spillway is + 50.50, bed elevation of dam is + 46.50 and elevation of crest main dam is + 56.00. The design of stilling basin uses USBR Type II with 57.50 m in length. After getting the spillway dimension it needs to calculate the stability consist of rolling stability, shear stability and uplift stability. This analysis is done in the most critical condition, when water surface as high as spillway crest and as high as design flood. The result of stability analysis shows that spillway stability full fills the requirement.

Item Type:	Thesis (Other)
Additional Information:	RSS 627.883 Sya p
Uncontrolled Keywords:	Perencanaan, Dimensi Spillway dan Stahilitas, Design, The Dimension of Spillway and Stability
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC555 Spillways. Energy dissipation. Hydraulic jump.
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	magang .
Date Deposited:	27 Oct 2026 06:35
Last Modified:	27 Oct 2026 06:35
URI:	http://repository.its.ac.id/id/eprint/145892

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