Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Rip Current At Pangandaran And Palabuhanratu

This research aims to know the causes, types and mechanisms of the rip current at Pangandaran and Palabuhanratu. The methods used in this research are image data analysis, visual observation, and field observations in June and September 2015. The image data obtained from Google Earth, visual observation with the aid of a video camera and field observations with measurements of oceanographic parameters of a wave, bathymetry, currents and staining using dye balls. The results showed the length and width of rip currents at Pangandaran around 300 meters and 90 meters, while in Palabuhanratu which ranges from 150 meters and 40 meters. Wave velocity (C) is 1.47 m/s and 1.51 m/s in Pangandaran, 1.13 m/s and 1.04 m/s in Palabuhanratu. The significant wave height (Hs) in Pangandaran is 1.42; while in Palabuhanratu is 1.58 meters. Bathymetry near the beach in both locations showed morphological appearance of the beach cup with water depth is 0-7 meters in the breakzone. Based on the characteristics of the constituent factors, the type of rip currents at Pangandaran and Palabuhanratu is Accretionary beach rip and Topographic rip. Rip current formation process begins with the coming wave passing through surfzone then deflected by the long shore current and returned to the sea away from the shore. Rip currents at Pangandaran and Palabuhanratu formed daily and last throughout the year.