Tuanany, Hilda and Utomo, Puji (2019) EVALUASI MODEL EMPIRICAL AREA REDUCTION METHOD (EARM) DAN RESERVOIR DEPTH SHAPE FUNCTION (RDSF)UNTUK MENENTUKAN DISTRIBUSI SEDIMEN PADA WADUK WADASLINTANG EVALUATION OF EMPIRICAL AREA REDUCTION METHOD (EARM) MODEL AND RESERVOIR DEPTH SHAPE FUNCTION (RDSF) TO DETERMINE SEDIMENT DISTRIBUTION IN WADASLINTANG CONTAINERS. Tugas Akhir thesis, University Technology Yogyakarta.
|
Text
HILDA TUANANY-515081158-ABSTRAK-.pdf Download (237kB) | Preview |
Abstract
ABSTRAK Dalam aspek keberlanjutan fungsi waduk perlu dilakukan monitoring dan evaluasi untuk mengetahui perkembangan sedimentasi waduk. Biasanya melalui pengukuran echosounding. Namun dalam praktik di lapangan, tidak semua pengelola waduk melakukan pengukuran echosounding secara periodik karena pertimbangan biaya pelaksanaan yang mahal. Untuk mengantisipasi tersebut, diperlukan metode empiris untuk mengetahui pola distribusi sedimen. Jadi pada penelitian ini menggunakan metode baru untuk memprediksi distribusi sedimen melalui waduk dengan mengevaluasi metode empiris terbaru yang dikembangkan di beberapa waduk di luar negeri dan dibandingkan dengan metode empiris yang sudah ada sebelumnya dalam memprediksi distribusi sedimen pada beberapa waduk yang ada di Indonesia. Terdapat 2 metode untuk di evaluasi, diantaranya adalah emperical area reduction method dan reservoir depth shape function. Hasil penelitian menunjukan laju pendangkalan sedimen tahun 1987 sebesar 13,357 %, tahun 1993 sebesar 22,847%, 2004 sebesar 31,457%, 2008 sebesare 39,192% dan 2013 sebesar 46,397%. dari hasil pendangkalan diperoleh kurva yang menunjukan bahwa waduk wadaslintang masih bisa menjalankan fungsinya karena tidak mencapai kriteria Hartung, Pitt dan Thompson, bahwa waduk tidak lagi complies dengan fungsinya bila tertimbun lumpur di 80%. Menurut Pitt dan Thompson sedangkan waduk tidak beroperasi ketika 50% dari penyimpanan waduk diisi dengan sedimen. Pengaruh sedimen pada Waduk Wadaslintang dengan metode Empirical Area Reduction memiliki nilai akurasi yang lebih minim dari pada motode reservoir depth shape function. Nilai akurasi RDSF 1987-1993 sebesar 0,7 sedangkan empirical sebesar 1,04, tahun 1993-2004 RDSF sebesar 1,5 sedangkan empirical sebesar 1,03, tahun 2004-2008 sebesar 0,7 sedangkan empirical sebesar 0,9, dan 2008-2013 RDSF sebesar 1 sedang empirical sebesar 0,9. Dari kedua metode yang di evaluasi dan dibandingkan metode yang cocok yang digunakan untuk menghitung distribusi sedimen pada Waduk Wadaslintang dan memberikan hasil yang memuaskan adalah metode Empirical Area Reduction Method penerapan metode empiris baru reservoir depth shape function pada waduk wadaslintang memberikan hasil yang kurang memuaskan. Kata kunci: Distribusi Sedimen, Empirical Area Reduction Method, reservoir depth shape function Sedimen, Waduk Wadaslintang ABSTRACT In terms of the sustainability of reservoir functions, monitoring and evaluation is needed to determine the development of reservoir sedimentation, usually through echosounding measurements. But in practice, not all reservoir managers carry out periodic echosounding measurements due to the high cost of implementation. To anticipate this, an empirical method is needed to determine sediment distribution patterns. This study uses a new method to predict sediment distribution through reservoirs by evaluating the latest empirical methods developed in several reservoirs abroad and compared with pre-empirical methods in predicting sediment distribution in several reservoirs in Indonesia. There are 2 methods to be evaluated, including emperical area reduction method and reservoir depth shape function. The results showed the ssedimentation rate in 1987 was 13.357%, 1993 was 22.847%, 2004 was 31.457%, 2008 was 39.192% and 2013 was 46.397%. from the silting results obtained a curve that shows that the Wadaslintang reservoir can still carry out its function because it does not reach the criteria of Hartung, Pitt and Thompson, that the reservoir no longer complies with its function if buried in mud at 80%. According to Pitt and Thompson while the reservoir was not operating when 50% of the reservoir storage was filled with sediment. The effect of sediment on the Wadaslintang Reservoir with the Empirical Area Reduction method has a lower accuracy value than the reservoir depth shape function method. The accuracy of RDSF 1987-1993 was 0.7 while empirical was 1.04, in 1993-2004 RDSF was 1.5 while empirical was 1.03, 2004-2008 was 0.7 while empirical was 0.9 and 2008 -2013 RDSF of 1 while empirical is 0.9. From the two methods evaluated and compared to the suitable method used to calculate the sediment distribution in the Wadaslintang Reservoir,The Empirical Area Reduction Method provides satisfactory results while the new empirical method reservoir depth shape function in Wadaslintang reservoir provides unsatisfactory results. Keywords: Sediment Distribution, Empirical Area Reduction Method, reservoir depth shape function Sediment, Wadaslintang Reservoir Daftar Pustaka Achsan, dkk. 2015. Analisis Kecenderungan Sedimentasi Waduk Bili-Bili dalam Upaya Keberlanjutan Usia Guna Waduk. Jurnal Teknik Pengairan Volume 6 No. 1, 31-32. Annandale, G. W. 1984. Predicting the distribution of deposited sediment in Southern African Reservoirs. In Challenges in African Hydrology an Water Resources, Proceedings of the Harare Symposium, Volume 144, pp. 549-558, Harare, Zimbabwe, July 1984. IAHS:Wallingford, Oxfordshire. Chaundari, D. 2017. Empirical Approaches in Prediction of Reseroir Sediment Distribution-An Experience of 57 Reservoir in the USA and India. Internasional Journal of Seidment Research, 32, 260-276. Garde, R. J., Swamee, P. K., Dalvi, M. E. 1978. Estimation of Progressive Deposition in Reservoirs. In Proceeding of the 47th Research Session of the CBIP, Hubli-Dharwar, Karnataka, Volume 1, pp. 1-50.
| Item Type: | Thesis (Skripsi, Tugas Akhir or Kerja Praktek) (Tugas Akhir) |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Fakultas Sains dan Teknologi > S1 Teknik Sipil |
| Depositing User: | Kaprodi S1 Teknik Sipil UTY |
| Date Deposited: | 30 Jul 2019 08:45 |
| Last Modified: | 30 Jul 2019 08:45 |
| URI: | http://eprints.uty.ac.id/id/eprint/3180 |
Actions (login required)
 |
View Item |
