Kualitas Air Pasca Pengerukan Alur Transportasi Batu Kapur di Sungai Donan Cilacap

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Abstrak: River Donan has the potential of international ship’s channel due to the availability of industry. Unfortunately, the drift gill net operation was predicted causing river shallowness and disturbing the limestone transportation channel. The aim of research was to know the water quality based on physic, chemical, and biological aspects at the north, central, and south area of dredging; and sediment texture, benthos and plankton as proponent. Survey was done at all areas of dredging from January to March 2008. Water samples were taken according to PPRI Number 82/2001 and the procedure of SNI. Data was analised as descriptive and supported by Sorensen similarity index. The result showed that the concentration of TDS, NH3, Mn and Fe was above levels considered as water quality standard at all areas; even the concentration decreases. On the other hand, increasing the concentration of H2S was only at the central area, whereas the concentration of Pb, silty clay sediment texture, and domination of benthic of Rhinoclavis asper and plankton of Lyngbya spirulinoides were at the central and south areas (similarity index of this research was 95.14%; the research before was 99.15%). The conclusion showed that the dredging did not change the high concentration of TDS because it which was taken along tide was hampered by the net. In addition, the concentration of Pb, silty clay sediment texture, and the dominant benthic and plankton have the same tendencies at the central and south areas.
Kata Kunci: water quality, dredging, River Donan, Cilacap
Penulis: Mohammad Husein Sastranegara, Sri Lestari
Kode Jurnal: jpbiologidd090068

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Jp Biologi dd 2009