Many activities in the Pekak Lake contribute the input of organic and anorganic matter that affec... more Many activities in the Pekak Lake contribute the input of organic and anorganic matter that affects the water quality, especially nutrient concentration in waters. A research aims to understand the trophic state of the Pekak Lake based on TSI has been conducted in March-April 2018. There were two sampling points, in the surface (0.2 m) and 2 secchi depth (0.75). Sampling were conducted 3 times, once/week. Water quality parameter measured were total phosphate, chlorophyll-a, transparancy, dissolved oxygen, CO2, pH and temperature. Results shown that the total phospate 0.152-0.508 mg/L, chlorophyll-a 7.061-11.186 µg/L, transparancy 0.69-0.77 m, dissolved oxygen 5.36-5.96 mg/L, CO2 8.81-16 mg/L, pH 5 and temperature 27-30 o C. TSI (Trophic State Index) value of the Pekak Lake was 64.559-70.465 and indicates that the Pekak Lake water is in moderate eutrophic-hypereurophic.
Many activities in the Pekak Lake contribute the input of organic and anorganic matter that affec... more Many activities in the Pekak Lake contribute the input of organic and anorganic matter that affects the water quality, especially nutrient concentration in waters. A research aims to understand the trophic state of the Pekak Lake based on TSI has been conducted in March-April 2018. There were two sampling points, in the surface (0.2 m) and 2 secchi depth (0.75). Sampling were conducted 3 times, once/week. Water quality parameter measured were total phosphate, chlorophyll-a, transparancy, dissolved oxygen, CO2, pH and temperature. Results shown that the total phospate 0.152-0.508 mg/L, chlorophyll-a 7.061-11.186 µg/L, transparancy 0.69-0.77 m, dissolved oxygen 5.36-5.96 mg/L, CO2 8.81-16 mg/L, pH 5 and temperature 27-30 o C. TSI (Trophic State Index) value of the Pekak Lake was 64.559-70.465 and indicates that the Pekak Lake water is in moderate eutrophic-hypereurophic.
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