IOP Conference Series: Earth and Environmental Science, vol: 246,1 (2019)
Organic Matter Concentrations in Morosari River Estuary, Sayung, Demak, Central Java
Supriyantini E., Yulianto B., Santoso A., Wulandari S.Y., Sedjati S., Soenardjo N., Ariananta D.F.
Abstract
This study was carried out to determine the concentration of organic matter in the Morosari River estuary, Sayung Demak. The study was conducted in January and February 2017. Water sampling was conducted at three stations (St.1 = residential area, St.2 = high density mangrove area, St.3 = low density mangrove area) and each station was divided into 3 point substations. The results showed that the concentration of organic material at estuary, through BOD measurement was 1.9 – 2.13 mg/L (January) & 1.10 – 1.34 mg/L (February); COD 17.3 – 22.67 mg/L (January) & 11.57 – 17.67 mg/L; TSS 223,33 – 277,00 mg/L (January) & 301,00 – 546,67 mg/L (February); TDS 377,67 – 603,67 mg/L (January) & 292,67 – 431,67 mg/L (February) and TOM 11,83 – 13,35 mg/L (January) & 17,10 – 19, 91 mg/L (February). In general, the concentration of organic matter in the estuary has not exceeded the quality standard set by Decree of the Minister of Environment No. 51 of 2004 on the Quality Standard of Sea Water, so that the waters of the Morosari River estuary can be said to have not been contaminated with organic matter and still suitable for the life of the organisms. © 2019 IOP Publishing Ltd.
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