RIP CURRENTS SIGNATURES ZONE DETECTION ON ALOS PALSAR IMAGE AT PARANGTRITIS BEACH, INDONESIA
Arry Retnowati, Muh Aris Marfai, Josaphat Tetuko Sri Sumantyo · DOAJ (DOAJ: Directory of Open Access Journals) · 2013
Having bay and gulf morphology as cresentic beach, Parangtritis coast has been known potentially threat by rip currents hazard. This study aims to identify and detect breaking waves region and surf zone on ALOS PALSAR images, and identify and extract the cove shape shoreline morphology of Parangtritis beach. ALOS PALSAR Fine Beam Single (FBS) HH polarization acquired on 2nd May 2007 and 17th June 2007, off nadir angle 34.3º, and in descending mode level 1.0 were utilized to derive amplitude information using Sigmasar. Shoreline morphology detection showed that the cusps system has not changed much during May to June 2007 when PALSAR images acquired, but might have shifted individually. The use of optical sensor with the same spatial resolution, ALOS AVNIR-2, supports to distinguish the boundary and determine the shoreline morphology of Parangtritis beach.