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KMID : 0605219880050010021
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Pusan Dental Journal
1988 Volume.5 No. 1 p.21 ~ p.31
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A study of Offshore Water Quality in Pusan Area(Ⅲ)
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Abstract
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An investigation of offs´bra water quality in Pusan area was carried out from Oct., 1985 to Oct., 1937. Water was sampled fram 13 sites d-sinated by Korean Environmental Pollution Control Agency, a--ii analyz-d by Korean E~uiranm3ntal Paliu:ion Standard Met-hods. In general, the estuaries of thi Suyeon, liver (sampling site 1) and the Naktong River (sampling sites 11, 12 an3 13) ware th-_ most heavily polluted. The ranges of annual variations of water contents at sampling site 1 were as fallows: pH, 6.80-7. 15; DO, 1.58-5.8) ppm; COD, 11.0-35.0 ppm; SS, 22.0-63.15 ppm; Hg, 0.92-1. 15 ppb; Cd, 0.30-0.35 ppb; NJ,-N, 0.033-0. 12) pp:n; PD,-P, 0.0)12-9.0193 ppm; E. coli, 79)0-1809)00 MPN/109 ml. Similarly, sampling site 11 had tha following water contents: pH, 8.2)-8.35; DO, 8.55-8.8) ppm; SS, 23.21-33.19 ppm; Hg, 0.21-9.23 ppb; Cd, 0.48-0.53 ppb; NO3-N, 0.0260-0. 0331 ppm; PJ,-P, 0.0943-9.0)53 ppm ; E. coli, 49)0-43)90 MPN/10) ml. The water contents of sampling site 12 were as follows: p-1, 7.89-8.2); DJ, 8.89-9.08ppm; SS, 31.93-30.93 ppm; Hg, 0.21-0.26 ppb; Cd, 0.43-0.54 ppb; NJ,-N, 0.02)7-0. 0475 ppm; PO,-P, 0.0043-9.0053 ppm; E. coli, 5)))-3))) MPN%1)) ml. Also, sampling site 13 had the following: p:-I, o. 0´5-8.2): D.), 9.03-9. 13 p?m; S3, 003-92-43. 11 ppm; Hg, 0. 11-0. 16 ppb; Ci, 0.23-9.33 ppb; NJ,-N, 0.0337-9.0323ppm; PJ;-P, 0.0)13-0.0331 ppm; E. coli, 260-40) M?iN/10)ml. While wat-r qualit.;r of th- estuary 0f V-12 Suyeong River(sampl_irtg site 1) and Suyeon.1 Bay (sa:n)lin; sit- 2) a>>z s t) lb, t-m.a,ily im):7o;ed by chemical treatment, heavy metal co:jtants in this area s´io.vcd a gradual in; rease. Furth-r, water pollution at all sites except the estuary of the Suyeong River and Suyeong Bay seems to be accelerated.
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