universitas brawijaya malang 2010summary the beach area has significance as a transitional form of...

7
LAPORAN HASIL PENELITIAN DISERTASI DOKTOR TAHUN ANGGARAN 2010 Judul : Model Penyebaran Sedimen di Muara Pantai (Studi Kasus Muara Pantai Sendang Biru Kabupaten Malang) Peneliti :: USSY ANDAWAYANTI Dibiayai Oleh Direktorat Jenderal Pendidikan Tinggi, Kementerian Pendidikan Nasional sesuai dengan Surat Perjanjian Penugasan Dalam Rangka Pelaksanaan Penugasan Penelitian Disertasi Doktor Tahun Anggaran 2010 Nomor : 492/SP2H/PP/DP2M/VI/2010, tanggal 11 Juni 2010. Universitas Brawijaya Malang 2010 BIDANG ILMU : REKAYASA

Upload: others

Post on 28-Dec-2019

2 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In

LAPORAN HASIL PENELITIAN DISERTASI DOKTOR

TAHUN ANGGARAN 2010

Judul : Model Penyebaran Sedimen di Muara Pantai (Studi Kasus Muara Pantai Sendang Biru Kabupaten Malang)

Peneliti :::: USSY ANDAWAYANTI

Dibiayai Oleh Direktorat Jenderal Pendidikan Tinggi, Kementerian Pendidikan Nasional sesuai dengan Surat Perjanjian Penugasan Dalam Rangka Pelaksanaan

Penugasan Penelitian Disertasi Doktor Tahun Anggaran 2010 Nomor : 492/SP2H/PP/DP2M/VI/2010, tanggal 11 Juni 2010.

Universitas Brawijaya Malang 2010

BIDANG ILMU : REKAYASA

Page 2: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In
Page 3: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In
Page 4: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In

RINGKASAN

Daerah Pantai mempunyai arti penting sebagai tempat peralihan sarana

perhubungan laut berupa pelabuhan dan sarana dan prasaran di darat. Selain itu banyak ativitas yang dilakukan di pantai baik di pesisir pantai maupun di sekitar muara pantai seperti aktivitas pelayaran, wisata bahari, pelabuhan perikanan laut. Semakin intensifnya kegiatan pemanfaatan wilayah pantai dan muara sungai dapat menimbulkan pendangkalan akibat proses sedimentasi sehingga muara akan tertutup sedimen yang dapat menghambat aliran sungai dan menaikkan muka air di hulu muara sehingga dapat terjadi perubahan garis pantai. Sehubungan dengan keadaan tersebut, maka diperlukan penelitian tentang bagaimanakah pola penyebaran sedimen di muara sungai sehingga dapat ditentukan pengaruh sebaran sedimen tersebut terhadap stabilitas garis pantai. Oleh karena itu tujuan dari penelitian ini adalah untuk mengetahui laju sedimentasi dan pola penyebaran sedimen di muara sungai sehingga dapat memberikan masukan untuk menganalisis perubahan garis pantai di daerah kajian.

Penelitian mengenai aliran dan fenomena transport di sekitar perairan estuari dan pantai perlu dilakukan terutama pada muara melibatkan arus sungai dan pasang surut. Oleh karena itu untuk mengetahui pola penyebaran sedimen di muara diperlukan suatu analisis mengenai transpor sedimen di sungai yang dipengaruhi oleh arus di sungai dan transpor sedimen di pantai yang dipengaruhi oleh gelombang ,pasang surut air laut. Adapun Pemodelan teoritis pola penyebaran sedimen di muara menggunakan bantuan program komputer. Perangkat lunak yang akan digunakan dalam simulasi adalah Surface-Water Modeling System (SMS) dari Brigham Young University.

Dari hasil analisis didapat laju sedimen yang terjadi di muara berasal dari sedimen di sungai dan sedimen di pantai. Qsout= 66042,94 m3/th, Qnorth = 73790,85 m3 /th,Qsungai=15369,73 m3/th. Sedang hasil analisa angkutan sedimen maka besar angkutan sedimen yang terjadi adalah sebesar 23117,64 m3/th ke arah sisi kiri garis normal pantai. Pola penyebaran arahnya menuju ke arah utara dari mulut muara. Sehingga pola pergerakan sedimen terbesar ke arah pantai yang berada di sebelah utara mulut muara. Hal ini akan berpengaruh pada garis pantai yang berada di sebelah utara mulut muara. Kata kunci : muara, sedimen sungai, sedimen pantai, pola penyebaran sedimen

Page 5: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In

SUMMARY

The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In addition, many ativitas conducted in both the coastal beaches and estuaries around the coast such as shipping activities, marine tourism, marine fishery harbor. The more intense utilization of coastal and estuarine areas can lead to siltation due to sedimentation processes so that the estuary would be closed sediment that can impede the flow of the river and raise the water level upstream of the estuary so that it can happen shoreline change. In connection with these circumstances, it is necessary to research on how patterns of spread of sediment at the mouth of the river so as to determined the influence of the sediment distribution on the stability of the coastline. Therefore, the aim of this study was to determine the rate of sedimentation and sediment distribution patterns in the estuary of the river so as to provide input to analyze changes in the shoreline area of study.

Research on flow and transport phenomena in the vicinity of estuarine and coastal waters need to be done especially in the estuary involving current and tidal rivers. Therefore to know the distribution pattern of sediment in the estuary is required an analysis of sediment transport in rivers that are influenced by currents in the river and sediment transport on the coast which is influenced by waves, tides. The theoretical modeling of the spread pattern of sediment in the estuary using a computer program. The software will be used in the simulation is the Surface-Water Modeling System(SMS) from Brigham Young University.

From the results obtained analyzing the rate of sediment that occur in the estuary comes from sediment in the river and the sediment on the beach. Qsout = 66042.94 m3/year, Qnorth = 73790.85 m3/year, Qriver = 15369.73 m3/year. Being the result of sediment transport analysis, the major sediment transport that occurred amounted to 23117.64 m3/year toward the left side of the normal line of the beach. The pattern of spread of direction toward the north from the mouth of the estuary. So that the largest sediment movement patterns to the beach which is located on the northern mouth of the estuary. This will affect the coastline in the north of the mouth of the estuary.

Key words: estuary, river sediments, coastal sediments, sediment distribution

patterns

Page 6: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In

DAFTAR PUSTAKA

----------, Coastal Erosion, Retrieved from "http://en.wikipedia.org/wiki/Coastal_erosion Aiwen Ying. 2004. Sediment Transport At Very High Concentrations And Its

Movement Behavior. Water Information Center, Ministry of Water Resources,Beijing, China (JOURNAL OF ENVIRONMENTAL HYDROLOGY, The Electronic Journal of

the International Association for Environmental Hydrology, vol.4, ,On the World Wide Web at http://www.hydroweb.com

Anonim. 2001. Coastal Engineering Manual Part V Coastal Structure.

Washington.DC:US Army Corps of Engineers. Anonim. 2003. Workbook and System User”s Manual GENESIS-CEDAS (Coastal

Engineering Design & Analysis System) Versi 2.01. Washington.DC: US Army Corps of Engineers.

Anonymous. 2004. Predicting Beach Erosion. The Futurist; Sep/Oct; 38, 5; ABI /

INFORM Research, pg. 12 Ayesha S Genz; Charles H Fletcher; Robert A Dunn; L Neil Frazer; John J Rooney.2007. The Predictive Accuracy of Shoreline Change Rate Methods and Alongshore Beach., Journal of Coastal Research; Jan; 23, 1; ProQuest Science Journals, pg. 87

Brush. 1984~. Stratigraphic evidence of eutrophication in an estuary. Water Resour.

Res. 20:, 531-541. David C,MP. 2006. California Coasta) Sediment Master Plan Status Report. California

CoastalSedimentManagement Workgroup,http://dbw.ca.gov/csmw/csmwhome.htm

David H Willis; B G Krishnappan. 2004. Numerical modelling of cohesive sediment

transport in rivers. Canadian Journal of Civil Engineering; Oct; 31, 5; ProQuest Science Journals, pg. 749

G.M.E. Perillo, 1995, Geomorphology and Sediment of Estuary, Elsevier Science

Herbich, John B. 2000. Handbook of Coastal Engineering. United States of Amerika:McGraw Hill

Horikawa,Kiyoshi. 1978. Coastal Engineering. Japan: University of Tokyo Press

Isfandi, Dedy. 2001. Analisa Laju Erosi Terhadap Perubahan Garis Pantai Di Pantai Utara Pulau Gili Ketapang Kabupaten Probolinggo Created by Theses Marine Engineering, RT 551.302

Leo C. Van Rijn, Estuarine And Coastal Sedimentation Problems, Delft Hydraulics

and University of Utrecht, The Netherlands. E-mail: [email protected] Officer, C.B.,D.R. Lynhk, G.1~. Setlock, AND G.II. Helz, . 1984. Recent sedimentation

rates in Chesapeake Bay, p. 13 l-l 58. Zn V. S. Kennedy [ed.], The estuary as a filter. Academic.

Page 7: Universitas Brawijaya Malang 2010SUMMARY The beach area has significance as a transitional form of port facilities and sea transportation facilities and infrastructure on land. In

Thomas M Ravens; Khairil I Sitanggang. 2007. Numerical Modeling and Analysis of

Shoreline Change on Galveston Island, , Journal of Coastal Research; May; 23,3; ProQuest Science Journals, pg. 699

Triatmojo,Bambang. 1999. Teknik Pantai. Yogyakarta: Ilmu teknik Universitas Gajah

Mada. Widjiharti,Endang. 2000. Studi Morfologi Pantai Dengan Menggunakan Teori Garis

Tunggal (SINGLE LINE THEORY) Studi Kasus Pantai Timur Sidoarjo (The Study Of Coastal Morphology By Using The Single Line Theory A Case Study Of East Coast Of Sidoarjo).Created by ITS

Yuwono, Nur. 1986. Teknik Pantai Volume 1.Yogyakarta: Biro Penerbit Keluarga

Mahasiswa Teknik Sipil Fakultas Teknik Universitas Gajah Mada.