Wardhana, Mahendra Kusuma (2015) KAJIAN PERUBAHAN GARIS PANTAI DAN ARAHAN TEKNIK PENGELOLAAN DI PANTAI SAMAS DAN LAGUNA BAROS KABUPATEN BANTUL, DAERAH ISTIMEWA YOGYAKARTA. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
ABSTRACT
Sharoline change impacts on the environment such as setbacks and progress
coastline. Shoreline setback impacts on the mangrove ecosystem changes, changes in
landform coastal areas, and the loss of shelter and livelihoods of the people who use
the coastal area. In addition, theprogress of the coastline has an impa ct on the
environment such as the disruption of coastal ecosystems and disruption of the flow
oh Opak’s mouth river. The puprose of this research are : ( 1 ) Knowing coastlines
undergoing changes in the period 2012-2014; ( 2) Knowing the natural factors that
are more dominant effect on shoreline change; ( 3 ) Determine the direction of
shoreline change management techniques in Samas’s Beach.
The initial phase of the study conducted by survey method for determining
the point of shoreline change. Point change s into account land use maps, geological
maps and google earth image. The slope of the beach is measured at the point of
shoreline change to determine the area of abrasion and sedimentation. The magnitude
of changes in the coastline known based on the interpretation, digitization,
delineation and calculation on google earth image in 2012-2014. Natural factors
more dominant effect on shoreline change obtained from the statistical analysis of
measurement data field following parameters: current speed, wave, and tidal. The
amount shoreline change, natural factors that dominate the coastline changes, the
condition of the existing diversion, and Spatial Kab. Bantul years 2010 -2030 used as
the basis for determining the direction and technical management of shore line change
at Samas Beach and Laguna Baros.
Based on the result, the rate of shoreline’s change in 2012 – 2014 is +4,09
m/year, extensive change is +1145,71 m
2
/year, the percentage of coastline’s change
is 44,12% every year. Natural factors that influence changes in the coastline, the
currents and waves. Based on the study and evaluation of shoreline change, the
direction of the management techniques that can be applied in the study area 1)
Mechanism and rehabilitation of mangrove forests by kind Avicenniaceae to the area
immediately adjacent to the sea , and for the mainland areas with the type Rhizopora
Sp density 10000 plants / ha; 2) Changes in the pattern of current flow of the river
and ocean currents in the estuary Opak; 3) Addition of sediment in the western and
southern regions Opak estuary.
Keywords: shoreline change, natural factors, concept of the management
INTISARI
Perubahan garis pantai memberikan dampak terhadap lingkungan seperti
kemunduran dan kemajuan garis pantai. Dampak tersebut antara lain yaitu ekosistem
mangrove, perubahan bentuk lahan daerah pesisir, dan hilangnya tempat tinggal serta
mata pencaharian masyarakat, terganggunya ekosistem pantai dan terganggunya
aliran muara sungai Opak. Tujuan penelitian ini yaitu: (1) Mengetahui besar garis
pantai yang mengalami perubahan pada periode tahun 2012-2014; (2) Mengetahui
faktor alami yang lebih dominan berpe ngaruh terhadap perubahan garis pantai; (3)
Menentukan arahan teknik pengelolaan perubahan garis pantai di Pantai Samas.
Tahap awal penelitian dilakukan dengan metode survey untuk penentuan titik
perubahan garis pantai. Titik perubahan mempertimbangkan pe ta penggunaan lahan,
peta geologi dan citra google earth. Kemiringan pantai diukur pada titik perubahan
garis pantai untuk mengetahui daerah abrasi dan sedimentasi. Besarnya perubahan
garis pantai diketahui berdasarkan hasil interpretasi, digitasi, delinia si dan
perhitungan pada citra google earth tahun 2012-2014. Faktor alami yang lebih
dominan berpengaruh terhadap perubahan garis pantai diperoleh dari hasil analisis
statistik data pengukuran lapangan parameter berikut : kecepatan arus, gelombang,
dan pasang surut. Besarnya perubahan garis pantai, faktor alami yang mendominasi
terjadinya perubahan garis pantai, kondisi sudetan yang ada saat ini, dan RTRW Kab.
Bantul tahun 2010-2030 dijadikan dasar penentuan arahan dan teknik pengelolaan
perubahan garis pantai di Pantai Samas dan Laguna Baros.
Dari hasil penelitian, besar laju perubahan lebar garis pantai periode tahun
2012-2014 sebesar +4,09 m/tahun; perubahan luas sebesar +1145,71 m
2
/tahun; dan
persentase perubahan panjang garis pantai sebesar 44,12 % per tahun. Faktor alami
yang berpengaruh terhadap perubahan garis pantai, yakni arus dan gelombang.
Berdasarkan kajian perubahan garis pantai dan evaluasi, maka arahan teknik
pengelolaan yang dapat di terapkan di wilayah penelitian yakni 1) Mekanisme dan
rehabilitasi hutan mangrove dengan jenis Avicenniaceae untuk daerah yang
berbatasan langsung dengan laut, dan untuk daerah daratan dengan jenis Rhizopora
Sp berdensitas 10000 pohon/Ha; 2) Perubahan pola aliran arus sungai dan arus laut di
Muara Sungai Opak; 3) Penambahan sedimen di daerah barat dan selatan Muara
Sungai Opak.
Kata Kunci : perubahan garis pantai, faktor alami, arahan teknik pengelolaan
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TD Environmental technology. Sanitary engineering |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Ratna Sufiatin |
| Date Deposited: | 07 Jun 2016 04:23 |
| Last Modified: | 07 Jun 2016 04:23 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/3130 |
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