PROFIL VERTIKAL FOSFAT DAN CHLOROPHYL-A SEKITAR KERAMBA JARING APUNG DI DANAU BANDAR KHAYANGAN, PROVINSI RIAU

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2014-01-30

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A research on vertical profile of Phosphate and Chlorophyl-a around floating cage area in the Bandar Khayangan Reservoir, Riau Province has been conducted on August 2011. This research aims to understand the vertical profile of phosphate and chlorophyll-a and trophic status of the water. Water samples were collected from 3 stations, namely station 1 ( in the upstream of the floating cage area), station 2 (in the floating cage area) and station 3 (downstream of the floating cage area). There were 2 sampling sites in each station, in the surface and in 2.5 secchi depth. Sampling was done three times, once a week. Results shown that Phosphate content in the surface was lower than that of the 2.5 secchi depth. In contrast, the chlorophyl-a in the surface was higher than that of the 2.5 secchi depth. Phosphate content in the surface was ranged from 0.09-0.15 mg/l, in 2.5 secchi depth was 0.09- 0.28 mg/l. Chlorophyll-a in the surface was 16.04-31.55 mg/l and in 2.5 secchi depth was 12.54-21.84 mg/l. Transparency was 53.0-68.3 cm, depth was 1.8-3.51 m, water temperature was 29.6-30.3oC, pH 5.5, dissolved oxygen was 4.5-6.0 mg/l and CO2 was 4.7-8.0 mg/l. Based on data obtained, it can be concluded that the water of the Bandar Khayangan Reservoir was very productive and able to support aquatic organisms living in that dam.

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Bandar Khayangan Reservoir, floating cage, phosphate and chlorophyll-a

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