THE EFFECT OF GROIN MODIFICATION TO SHORELINE CHANGE IN SANUR BALI

Authors

  • Soni Senjaya Efendi

DOI:

https://doi.org/10.32679/jth.v7i1.559

Keywords:

Groin, shoreline, beach erosion, sand, numerical modelling

Abstract

Coastlines formed by beach filling and groin constructions in Sanur Beach have undergone changes for years. Erosion and loose of sand after beach filling still occur. Therefore, it is a need for evaluation of coastal structure performance. The methodology to be used in this study  is by  comparing coastline from numerical model with the result of measurement from year 2012. For declined coastline in area between groins, the treatment is done with shape modification of existing groin and addition of new coastal structure. There are three areas among groins that needed special treatment, GN.4 – G7, G39 – GA2, and G32 – G37, which are identified by the model that has been calibrated with measurement data. Those three segments have greater coastline set back than others. In those three segments, the groins will be modified and new structure will be constructed. In GN.4 – G7, a breakwater parallel with coastline will be added in the middle area between groins and the groin structure at GN4 will be modified from T shape to I shape. Groin GA2 will be straightened and new groin parallel with coastline will be constructed in between area G39 – GA2. Meanwhile for G32 – G37 segment, breakwater parallel with coastline will be added in the both sides of groin G32. From the model output, groin modification and addition of new structure make the coastlines setback decrease from 6,15 meter to 5,34 meter in GN4, from 3,4 meter to 2,85 meter in GA2, and from 3,69 meter to 2,98 meter in G32.

References

Agustina, Nila. 2009. Pemodelan Perubahan Garis Pantai di Kabupaten Tegal dengan GENESIS. Surabaya: Tugas Akhir Jurusan Teknik Kelautan Fakultas Teknologi Kelautan ITS.

CERC. 2001. “Coastal Engineering Manual EM 1110-2-1100 (Part VI)”, Departement of The Army Waterway Experiment Station, Corps of Engineering Research Center, Washington: Fourth Edition, US Governtment Printing Office.

Dean, Robert G and Robert A. Dalrymple. 2002. Coastal Processes. Cambridge:University Press.

D.Y. Lesmana. 2006. Profile Measurement and Sediment Characteristics of Sanur Beach, Dept. of Civil Engineering, Udayana University.

Hsu, J.R.C. and Evans, C. 1989. Parabolic bay shapes and applications, Proc. Inst. Of Civil Engineers, London, England, Vol.87, 557-570.

Horikawa K. 1978. Coastal Engineering, an Introduction to Ocean Engineering, University of Tokyo.

JICA. 1989. The Feasibility Study on The Urgent Bali Beach Conservation Project.

National Research Council. 1995. Beach Nourishment and Protection, National Academy Press.

S. Onaka, T. Uda, T. Onuki, S. Endo. 2003. Field observation of wave and nearshore currents in the vicinity of a reef gap on Nusa Dua beach in Bali Island in Indonesia. Colombo – Sri Lanka: COPEDEC.

Shanti, D.E. 2006. Pemodelan Perubahan Garis Pantai disekitar Terminal dan Wisata Laut Tuban dengan Software GENESIS. Surabaya: Tugas Akhir Jurusan Teknik Kelautan Fakultas Teknologi Kelautan ITS.

Sulaiman, Dede M. 2003. Lessons From Bali Beach Conservation Project, Proceeding of the sixth Conference on Port and Coastal Engineering in Develoving Countries, Colombo, Sri Langka.

Silvester, R. and Hsu, J.R.C. 1997. Coastal Stabilization, Advanced Series on Ocean Engineering, Vol. 14. Singapore: World Scientific Publishing.

Triatmodjo, Bambang. 1999. Teknik Pantai. Yogyakarta: Beta Offset.

US Army Corp of Engineer. 1989. GENESIS: Generalized Model for Simulating Shoreline Change, Report 1 Technical Reference. Washington DC 20314.

Widhiyanto, W.W. 2005. Pemodelan Perubahan Garis Pantai USO Sulawesi Tengah dengan Menggunakan Software GENESIS.

Tugas Akhir Jurusan Teknik Kelautan Fakultas Teknologi Kelautan ITS. Surabaya.

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Published

2018-09-18

How to Cite

Efendi, S. S. (2018). THE EFFECT OF GROIN MODIFICATION TO SHORELINE CHANGE IN SANUR BALI. JURNAL TEKNIK HIDRAULIK, 7(1), 89–100. https://doi.org/10.32679/jth.v7i1.559

Issue

Vol. 7 No. 1 (2016): JURNAL TEKNIK HIDRAULIK

Section

ISI

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