Annisa, Nova Nurul (2020) Analisis Sedimentasi Terhadap Perubahan Luasan Mangrove Menggunakan Teknologi Penginderaan Jauh Multitemporal (Studi Kasus: Kabupaten Gresik). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kabupaten Gresik merupakan daerah hilir tempat bermuaranya Sungai Bengawan Solo dan terdapat Laut Jawa yang banyak membawa material sedimen ke daerah pantai. Akibatnya terjadi sedimentasi yang semakin lama membentuk suatu tanah timbul sebagai lahan baru untuk ditumbuhi mangrove.
Penelitian ini menganalisis perubahan luasan mangrove akibat adanya sedimentasi sehingga didapatkan informasi spasial mengenai perubahan mangrove dan sedimen tersuspensi di Kabupaten Gresik selama tahun 2016-2019 menggunakan data citra satelit Sentinel-2A. Estimasi konsentrasi sedimen tersuspensi dari data penginderaan jauh didapatkan menggunakan algoritma dari Budhiman (2004), Parwati (2004), Jaelani (2015), dan Laili (2015). Sementara itu, luasan mangrove didapatkan dari hasil klasifikasi terbimbing Maximum Likelihood.
Hasil penelitian menunjukkan bahwa keempat algoritma tersebut tidak memenuhi syarat akurasi menggunakan korelasi dan NMAE sehingga dibuat persamaan empiris baru yaitu TSS = 3.000.000 × exp(-34,71×((reflektan BOA Band Hijau)/(reflektan BOA Band Merah))). Selain itu dari penelitian ini diketahui bahwa terjadi penambahan luasan terbanyak terjadi di periode tahun 2016-2017 sebesar 479,347 Ha dan pengurangan luasan terbanyak terjadi di periode tahun 2018-2019 sebesar 534,087 Ha. Berdasarkan analisis yang telah dilakukan maka variabel sedimen tersuspensi sebagai sedimentasi berpengaruh terhadap variabel mangrove sebesar 64,9%. Serta terdapat pengaruh secara signifikan dari sedimentasi terhadap perubahan luasan mangrove dalam tingkat signifikansi 5% atau tingkat kepercayaan 95%.
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Gresik Regency is a downstream area where the Bengawan Solo River flows and there is a Java Sea which carries a lot of sediment material to the coast. As a result, there is sedimentation which is forming an arising land that can become new land for mangrove growing.
This study analyzes changes in mangrove area due to sedimentation so that spatial information about changes in mangroves and suspended sediments in Gresik Regency during 2016-2019 uses Sentinel-2A satellite imagery data. Estimated suspended sediment concentration from remote sensing data is obtained using algorithms from Budhiman (2004), Parwati (2004), Jaelani (2015), and Laili (2015). Meanwhile, the mangrove area is obtained from the Maximum Likelihood Supervised Classification.
The results of this research indicate that the four algorithms do not meet the specified accuracy requirements so that a new empirical equation is created, that is TSS = 3,000,000 × exp (-34.71 × ((BOA reflectance of the green band)/(BOA reflectance of the red band))). Also, it is known that the most extensive addition occurred in the 2016-2017 period by 479,347 Ha and the largest reduction in the area occurred in the 2018-2019 period by 534,087 Ha. Based on the results of the analysis, the suspended sediment variable as sedimentation affects the mangrove variable by 64.9%. And there is a significant influence of sedimentation on changes in mangrove area in the significance level of 5% or 95% confidence level.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | maximum likelihood, mangrove, multitemporal, Sentinel-2A, sedimen tersuspensi |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G70.5.I4 Remote sensing |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Geomatics Engineering > 29202-(S1) Undergraduate Theses |
| Depositing User: | Nova Nurul Annisa |
| Date Deposited: | 10 Aug 2020 03:08 |
| Last Modified: | 16 May 2023 07:15 |
| URI: | http://repository.its.ac.id/id/eprint/77155 |
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