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Hubungan Nitrat Dan Fosfat Dengan Kelimpahan Fitoplankton Di Genangan Waduk Plta Koto Panjang Kelurahan Batu Bersurat Kecamatan Xiii Koto Kampar Kabupaten Kampar Provinsi Riau
Many activities in the inundation of PLTA Koto Panjang Recervoir Batu Bersurat Village contributed organic matter that affect nitrate and phosphate concentration in waters and increasing the abundance of phytoplankton. A research aim to know the relationship between nitrate and phosphate with phytoplankton abundance in the inundation of PLTA Koto Panjang and it was conducted in June-July 2019. There were three sampling stations, namely Station I (tourisms and palm’s plantation), Station II (there were restaurant and trees around of station) and Station III (floating cage). In each station, there were three sampling points, in the surface (15 cm), in 2 Secchi depth (330 cm), and in 4 Secchi depth (660 cm). Sampling were conducted 4 times, once/week. Water quality parameter measured were nitrate, phosphate, phytoplankton abundance, transparency, temperature, pH, dissolved oxygen, free carbondioxide and BOD5 (Biochemical Oxygen Demand). The result shown: nitrate 0.06-0.08 mg/L, phosphate 0.05-0.09 mg/L, phytoplankton abundance 123,877-169,428 Cells/L, dissolved oxygen 6.35-6.88 mg/L,free carbondioxide 5-13.98 mg/L, temperature 28-31 oC, transparency 145.1-187.5 cm, pH 5-5.3 and biochemical oxygen demand (BOD5) 4.03-8.90 mg/L. The relationship of nitrate and phosphate with phytoplankton abundance was very strong.
Keywords: Kampar River, Floating Cage, Organic Matter, Water Quality, Mesotrophic
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