PENDAHULUAN - Istiarto Pendahuluan.pdf · Gerak individu Sedimen Gaya fluida (air) Water-Sediment...
Transcript of PENDAHULUAN - Istiarto Pendahuluan.pdf · Gerak individu Sedimen Gaya fluida (air) Water-Sediment...
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PENDAHULUAN Transpor Sedimen April 14
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Materi Kuliah q Bagian I (s.d. UTS)
q Pendahuluan, lingkup permasalahan transpor sedimen
q Karakteristika aliran dan sedimen
q Awal gerak butir sedimen
q Mekanisme transpor sedimen dan konfigurasi dasar sungai
q Transpor sedimen dasar
q Bagian II (setelah UTS) q Transpor sedimen suspensi
q Degradasi dan agradasi dasar sungai
q Sedimentasi di waduk
q Erosi lahan
q Transpor sedimen di estuari
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Transpor Sedimen 3
q Acuan q Mardjikoen, P., 1987, Angkutan Sedimen, PAU-IT UGM, Yogyakarta
q Graf, W.H., 1984, Hydraulics of Sediment Transport, Mc. Graf Hill, N.Y., USA
q Berbagai buku referensi tentang transpor sedimen yang banyak dijumpai (lihat di ruang referensi jurusan)
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Transpor Sedimen dan Aliran Air 4
Transpor sedimen dalam aliran air dengan berbagai kuantitas kandungan sedimen di dalam aliran air sungai
S. Rokan (2008) S. Progo (2010) S. Code (2011)
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Klasifikasi Transpor Sedimen 5
Gerak butir sedimen
Individu
Masif
§ Transpor sedimen dasar (bedload) § Transpor sedimen suspensi (suspended load) § Wash-load
§ Aliran debris (debris flow) § Aliran lumpur (mud flow) § Tanah longsor (landslides) § Aliran piroklastik (pyroclastic flow)
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Karaktersitika Transpor Sedimen 6
Material Gaya dominan
Gerak masif Campuran air dan sedimen Gaya gravitasi
Gerak individu Sedimen Gaya fluida (air)
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Water-Sediment Mixture
Aliran gravitasi campuran air-sedimen (gravitational flow of a water-sediment mixture)
Non-Newtonian Mixture (Cs > 8%) • Hyperconcentrated suspension • Debris flow
Quasi-Newtonian Mixture (Cs < 8%) • Concentrated suspension • Turbidity currents
Newtonian Mixture (Cs « 8%) • Bed load • Suspended load
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Transpor Sedimen Dasar
(Bed Load)
Transpor Sedimen Suspensi (Suspended Load)
Mekanisme Transpor Sedimen
Sumber Sedimen
Material Dasar (Bed Material)
Wash Load
Sumber Sedimen dan Mekanisme Transpor Sedimen
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Pergerakan Sedimen di Sungai 10
suspensi, terlarut
melompat, bergeser, menggelinding
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Gerak Sedimen 11
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Transpor Sedimen di Sungai Progo (Bendung Karangtalun) 12
pada musim hujan pada musim kemarau
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Gerusan Tebing Sungai 13
Sungai Progo di Sapon, Yogyakarta Sungai Serayu di Maos, Cilacap
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Gerusan Lokal di Pilar Jembatan 14
Jembatan KA Comal, Jateng (2002) Jembatan Trinil, Magelang (2010)
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Gerusan Lokal di Sekitar Pilar Jembatan 15
Jembatan Kebonagung, Yogyakarta (2006)
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Gerusan Lokal di Pilar Jembatan 16
Jembatan Pabelan, Jateng (2011)
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Gerusan Lokal di Groundsill 17
Groundsill Kretek, Yogyakarta (2007)
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Sedimentasi, Debris Flow 18
Sungai Code, 2011
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Transpor Sedimen di Muara Sungai Progo 19
13 Januari 2001 7 April 2004
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Penutupan Muara Sungai oleh Sedimen 20
Muarareja, Tegal, 2002
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Sedimen di Waduk Gajah Mungkur 21
pada musim hujan pada musim kemarau
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