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ITS » Master Theses » Teknik Manajemen Pantai - S2
Posted by tjuk at 04/01/2007 14:33:36  •  5864 Views


PENGARUH TRANSPOR SEDIMEN TERHADAP PERUBAHAN GARIS PANTAI KALIBUNTU - PROBOLINGGO

TRANSPORT SEDIMENT EFFECT ON SHORELINE POSITIONS OF KALIBUNTU

Author :
Siswanto, Roby 




ABSTRAK

Kawasan pantai Kalibuntu termasuk pantai yang paling parah mengalami erosi di kabupaten Probolinggo hal ini sudah berlangsung cukup lama. Proses dinamis pantai dipengaruhi oleh littoral transport yang didefinisikan sebagai gerak sedimen di daerah dekat pantai nearshore zone. Pantai yang mengalami erosi dan akresi tergantung pada sedimen yang masuk dan meninggalkan pantai tersebut. Pantai Kalibuntu merupakan kawasan pantai yang sebagian besar penduduknya hidup sebagai nelayan oleh karena itu kerusakan pantai sangat berpengaruh terhadap aktivitas yang ada. Analisa bathimetry gelombang arus angin shoaling dan refraksi merupakan langkah awal untuk mengetahui kondisi pantai yang sebenamya. Perhitungan perubahan garis pantai dilakukan dengan membandingkan perhitungan transpor sedimen antara metode Bijker dan metode Komar. Terdapat perbedaan nilai yang cukup signifikan dikarenakan metode Bijker memperhatikan beberapa parameter seperti kekasaran dasar ukuran butir kelandaian pantai dan karaktenstik sedimen yang masuk selain arus dan arah datangnya gelombang. Secara akumulasi perubahan garis pantai yang disebabkan oleh ketiga arah gelombang yang dominan yaitu barat laut utara dan timur laut oleh Bijker adalah sebesar 4.08 metertahun erosi lebih mendekati kondisi yang sebenamya dilapangan daripada Komar. Menunjuk dari hasil perhitungan perubahan garis pantai Kalibuntu ini maka perlu direkomendasikan kepada pemerintah kabupaten Probolinggo untuk mengatasi masalah ini dengan pembangunan konstruksi pelindung pantai yang dapat menghambat jalannya transpor sedimen sepanjang pantai dan mencegah terkikisnya pantai. Dimana perletakannya memperhatikan posisipias yang mengalami erosi ataupun akresi.


ABSTRACT

Kalibuntu is a coastal area that has the worst condition within Probolinggo regency coastal erosion has been going for long time. Dynamic processes of this area was occurred due to littoral transport sediment motion around nearshore zone. An erosion and accretion depending on incoming and outgoing sediments. Kalibuntu village is a coastal area whose population mostly live as fishermen. Therefore this dynamic processes in the coastal area directly effect their activities. Analysis of bathimetry wave current wind shoaling and refraction are the first step to study littoral transport in this coastal area. Calculations of shoreline positions are obtained by comparing calculation of sediment transport between Bijker and Komar method. There is a significant difference of value due to compute the sediment transport using the Bijker method we also need specific value of such parameters as bottom roughness particle grain size beach slope and incoming sediment character besides direction of wave and current. The accumulated shoreline of changes due to the three dominant wave direction i.e. north west north and north east by Bijker method are 4.08 myear erosion is closer with the real condition than Komar method. Based on this condition is recommended to the Probolinggo government to overcome by executing the construction work of coastal protector that can be hampered the movement of sediment transport along shoreline and avoid further coastal erosion which location shall consider its position of eroded coast as well as its accretion.



KeywordsLittoral transport; Bijker; erosi; Erosion
 
Contributor
  1. Dr. Ir. Wahyudi, M.Sc.
    Dr. Ir. Wisnu Wardhana, M.Sc.
Date Create: 04/01/2006
Type: Text
Format: pdf, 54 pages
Language: Indonesian
Identifier: ITS-Master-3100003017652
Collection ID: 3100003017652
Call Number: 551.302 Sis p


Source
Theses Marine Engineering, RT 551.302 Sis p, 2002

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