Abstract
Water quality monitoring is one of important activity, especially in coastal water, which susceptive with pollution. Water area of Serangan Island is a tidal flat area, influenced by fresh water and sea water inputs. The existence activities, such as cage aquaculture and tourism, and input from river, are threatened to decrease the water quality in north of Serangan water. This research was conducted to the condition of water quality based on water quality standard for aquatic organisms and its spatial distribution. The parameters measured were temperature, salinity, pH, DO, turbidity, and BOD5, in 8 sample points. Some parameters measured directly on water surface (temperature, salinity, pH and DO) and the others were analyzed in laboratory (turbidity, and BOD5). BOD5 was analyzed by standard method of Delzer & McKenzie. Based on research, the result of temperature values ranged from 28,9°C-30,5°C; salinity 29,6 ppt-32,7 ppt; pH 7,7-7,9; DO 3 mg/L-4,4 mg/L; turbidity 1,9 ntu-7,6 ntu; and BOD5 2,8 mg/L-5,4 mg/L. The water quality in Serangan had a different spatial distribution in each parameters. Overall, based on research result, the water quality condition in the body water of Serangan island was good and suitable to support aquatic organisms living.
Highlights
Abstrak Pemantauan kualitas perairan merupakan hal yang penting untuk dilakukan, khususnya di perairan pesisir yang umumnya rentan terhadap pencemaran perairan
which susceptive with pollution
This research was conducted to the condition of water quality based on water quality standard
Summary
Pulau Serangan terletak pada bagian Selatan Pulau Bali, tepatnya di Kecamatan Denpasar Selatan. Wilayah perairan pulau Serangan bagian utara dikelilingi oleh daratan pasang surut (tidal flat) (Sudiarta et al, 2013). Sebagai wilayah perairan yang produktif, pada wilayah perairan Serangan bagian utara dimanfaatkan oleh masyarakat sekitar untuk aktivitas perekonomian. Pada sebagian wilayah perairan pulau Serangan bagian utara dimanfaatkan sebagai lokasi budidaya perikanan keramba jaring apung. Menurut Dinas Peternakan, Perikanan dan Kelautan Kota Denpasar (2014), kegiatan budidaya laut di Kota Denpasar terkonsentrasi di wilayah perairan Serangan bagian utara. Pemantauan kualitas air pada perairan pesisir juga berfungsi untuk menjaga ekosistem dan habitat perairan karena kedua komponen tersebut yang akan terkena dampak dari penurunan kualitas perairan di perairan pesisir (Palaniappan et al, 2010). Tujuan dari penelitian ini adalah untuk mengetahui kondisi kualitas perairan berdasarkan baku mutu biota laut dan distribusi kualitas perairan secara spasial
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