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ITS » Master Theses » Teknik Manajemen Pantai - S2
Posted by ansi@its.ac.id at 03/03/2014 15:50:46  •  1558 Views


ANALISA PERUBAHAN MORFOLOGI MUARA SUNGAI PORONG AKIBAT SEDIMENTASI LUMPUR SIDOARJO JAWA TIMUR

ANALYSIS OF MORPHOLOGY CHANGE OF PORONG RIVER ESTUARY DUE TO SEDIMENTATION OF LUMPUR SIDOARJO EAST JAVA

Author :
LIYANI ( 4111205901 )




ABSTRAK

Bencana ekologis nasional semburan lumpur panas telah terjadi di daerah Sidoarjo Indonesia dikenal dengan Lusi Lumpur Sidoarjo pada tanggal 29 Mei 2006. Prakiraan volume semburan Lusi antara 50.000 120.000 m3hari. Muara adalah bagian hilir sungai yang langsung berhubungan dengan laut berfungsi sebagai pengeluaran air sungai. Sedimen yang terakumulasi dari sungai tersebut akan menyebabkan pendangkalan di daerah muara. Muara Porong yang terletak di Kecamatan Jabon Kabupaten Sidoarjo Jawa Timur merupakan muara dari Sungai Porong yang berasal dari percabangan sungai. Akibat pembuangan Lusi ke Sungai Porong terjadi transpor sedimen yang besar menuju muara Porong. Pada studi ini digunakan model numerik hidrodinamika menggunakan MIKE 21 yang dikembangkan oleh DHI Water Environment untuk mensimulasikan pola sirkulasi arus. Simulasi dilakukan dengan skenario pasut discharge sungai dan angin sebagai pembangkit. Hasil simulasi menunjukkan bahwa dalam rentang waktu simulasi kecepatan rata-rata sirkulasi arus sebesar 0.3 ms. Sementara pola sebaran sedimen hasil simulasi menunjukkan sedimen yang dibawa sungai ke muara cukup besar. Konsentrasi sedimen maksimum sebesar 4.257 gm3 dan konsentrasi sedimen terendah sebesar 0.219 gm3. Perubahan morfologi dasar muara bed level change tidak begitu signifikan dikarenakan dalamnya perairan dan konsentrasi sedimen yang terlarut sangat rendah.


ABSTRACT

Mudflow national ecological disaster has occurred in Sidoarjo Indonesia known as Lusi Lumpur Sidoarjo on May 29 2006. Estimate volume of Lusi between 50.000-120.000 m3day. Estuary is the mouth of the river that directly related to the sea which has function as a water expenditure. Accumulated sediment from the river will cause siltation in the estuary. Porong estuary located in Jabon district Sidoarjo regency East Java is the estuary of the River Porong derived from branching river. Due to disposal of Lusi to Porong river occurred large sediment transport toward Porong estuary. In this study numerical hydrodynamic models is used using MIKE 21 software developed by DHI Water Environment to simulate current circulation patterns. Simulations is executed with tidal river discharge and wind as a generator. The result of simulation shows that in the span of the simulation the average speed of the current circulation is 0.3 ms. While the distribution pattern of sediment simulations results shows that sediment brought from river toward estuary is quite large. The maximum sediment concentration is 4.257 gm3 and the lowest sediment concentration is 0.219 gm3. The bed level change of estuary is not so significant because of the depth of water and the concentration of sediment dissolved is very low.



KeywordsLumpur Sidoarjo; MIKE 21; muara; sedimentasi
 
Subject:  sedimen
Contributor
  1. Suntoyo, ST, MT, PhD
Date Create: 20/08/2013
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Master-41003140000571
Collection ID: 41003140000571
Call Number: RTPe 551.303 Liy a


Source
Master Thesis of Naval Architecture and Ship Building Engineering RTPe 551.303 Liy a 2012

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Copyright @2014 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




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  1.  ITS-Master-30183-4111205901-abstract-idpdf.pdf - 406 KB
  2.  ITS-Master-30183-4111205901-abstract-enpdf.pdf - 406 KB
  3.  ITS-Master-30183-4111205901-conclusionpdf.pdf - 409 KB




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