Abstract:
This research was conducted from July to August 2012 in Bandar Kayangan Lembah
Sari Reservoir. This study aimed to determine the relationship of BOD5 with nutrient. There
were six station, which two station in each zone. In each station the sampler were taken at
three different depths (surface, 2,5 fold of Secchi Disk and bottom). Water quality parameters
measured were temperature, transparancy, depth, current, pH, dissolved oxygen (DO), BOD5,
nitrate, phosphat and ammonia. Results shown water temperatures 31 - 31.70C, transparancy
47 - 55.83 cm, depth 1.2 -5 m, current 2.60 - 3.23 cm/sec, pH 5 , dissolved oxygen (DO) 2.4 -
6.8 mg / l, BOD5 3.8 - 7.4 mg/l, nitrate 0.01 - 0.09 mg / l, phosphate 0.017 - 0.247 mg / l and
ammonia 0.06 - 0.29 mg/l.
Based on data obtained, it can be concluded there are relationship of BOD5 with
nutrient. The concentration of BOD5 in the reservoir Bandar Kayangan Sari Valley coar
already polluted whereas phosphate concentration basedon lacustrine zone was eutrophic.
