Kendartiwastra, Duty (2018) Reduksi Data Pemeruman Menggunakan Tidal Zoning Melalui Pendekatan Tidal Constituent and Residual Interpolation (TCARI) (Studi Kasus: Selat Makassar). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Koreksi data pemeruman biasanya dilakukan dengan mengurangi nilai kedalaman terhadap tinggi muka air laut yang telah tereferensi terhadap chart datum di waktu yang sama. Faktanya, perbedaan lokasi pemeruman dan pengamatan pasut menyebabkan tinggi muka air laut di kedua tempat tersebut tidak sama dalam waktu yang sama. Hal tersebut terjadi karena adanya perambatan nilai amplitudo dan fase gelombang pasut yang terjadi karena perbedaan karakteristik pasut antara satu wilayah dengan wilayah yang lain. Pembuatan tidal zoning menggunkana metode Tidal Constituent and Residual Interpolation merupakan salah satu solusi untuk permasalahan ini. Kostanta dan residual didapatkan dari data pengamatan 7 stasiun pasut di sekitar Selat Makasssar menggunakan metode least square. Keduanya kemudian diinterpolasi di atas grid yang telah dibobotkan, lalu dihitung menggunakan persaamaan LaPlace. Perbandingan hasil Co-Tidal dari metode Tidal Constituent and Residual Interpolation dan model pasut global Finite Element Solution 2014, menunjukkan nilai kedekatan lebih dari 0,5. Selanjutnya, ekstraksi tinggi muka air laut dilakukan pada zona pemeruman yang terletak 27,752 kilometer dari Stasiun Mahakam. Dengan interval convidence 95%, menunjukkan bahwa hasil batimetri yang telah terkoreksi oleh tidal zoning dan pengamatan pasut secara langsung memiliki perbedaan yang signifikan.
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In Hydropraphic Survey, correction of the sounding data is usually done by reducing the depth value against the water level that has been referenced on the chart datum. In fact, due to the difference location of sounding activity and tidal observation, the water levels in both places are not same in the same time. This is due to tide amplitude and phase propagation caused by the different characteristics of the tides between tidal observation point and sounding survey location. Tidal Constituent and Residual Interpolation is one of the solutions can solve this problem. Tidal constituents and residuals were obtained from the 7 tide stations around Makasssar Strait using least square method. Both are interpolated on weighted grid field, then calculated using the LaPlace equation. The Co-Tidal results of this method compared with the Finite Element Solution 2014 global tide model, show a closeness value of more than 0.5. Then water levels are extracted from this Co-Tidal in the survey zone located 27.752 kilometers from Mahakam Station. With a level of significant 5%, indicating that bathymetry corectected by Tidal Constituent and Residual Interpolation and direct water level measurment has a difference result.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSG 551.464 Ken r-1 3100018077604 |
| Uncontrolled Keywords: | Pemeruman, Tidal Zoning, Kostanta Pasut, Pasut. |
| Subjects: | Q Science > QB Astronomy > QB415.2 Tides. T Technology > TC Hydraulic engineering. Ocean engineering > TC424 Water levels T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL798.N3 Global Positioning System. |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Geomatics Engineering > 29202-(S1) Undergraduate Theses |
| Depositing User: | Duty Kendartiwastra |
| Date Deposited: | 25 Nov 2020 02:03 |
| Last Modified: | 25 Nov 2020 02:03 |
| URI: | http://repository.its.ac.id/id/eprint/55529 |
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