Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Inner Water Characteristics of Anambas Island, Riau Province-Indonesia

Anambas archipelago which consists of 255 islands located in the southern South China Sea (sSCS) and parts of Riau province. This study aims to provide an initial overview of the Anambas’s water characteristics on East Monsoon (EM). Data was obtained from two primary surveys that conducted in 2012 and 2013. First survey collected a number of 20 stations which focused to the northeast region of Anambas that consists of Mengkian Island, Mandariau Island, and Penjalin Island. Second survey collected 16 stations which represented the whole inner water of Anambas. The depiction was done with primary data collection, calibration and data processing, visualization, and analysis. The results show that the Anambas water is the shallow one with the average depth of 40 meters. The tidal rangeis approximately 1.35 meters and the dominant ocean current is southward current that moves to KarimataStrait and Malacca Strait. The ocean current condition of Anambasis also affected by the water mass that originates from the South China Sea (SCS), Java Sea, and Malacca Strait. The other water properties were like ocean surface temperature (28-32.5 C), absolute salinity (2935 PSU), brightness(10-16 meters), pH (6.8-8.8 units), and dissolve oxygen(4.4-6.8 mg/L). The biological property such as the abundance of plankton varies and dominates by Thallasionema and shows significant correlation with the ocean current pattern.