摘要
本文报道了 1999年 1月 - 5月杭州湾畔金山漕泾地区用于水产养殖的河口沿岸水化学状况 :总含盐量 (16 .0 9± 2 .17)g L ;碱度 (1.61± 0 .61)mmol L ;pH值为 8.0 0± 0 .12 ;阴阳离子中含量最高者分别为 (8.37±1.2 3)g L的Cl- 与 (5 .0 5± 0 .72 )g L的Na+ +K+ ,为典型河口区水质特点。属海水水质类型 ,即氯化水、钠组、Ⅲ型 (ClNaⅢ)。常规水质指标如下 :Nt 为 (2 .0 1± 0 .40 )mg L ,其中NH3 -Nt 占 5 2 .9% ,NO-3 -N占 46 .6 % ,NO-2 -N占 0 .5 % ;有效磷PO3 -4 -P含量为 (0 .0 2 1± 0 .0 10 )mg L ;氮磷比 (N P) =2 12 (原子比 ) ;化学需氧量 (CODMn)为(10 .5 9± 1.42 )mg L ;五日生化需氧量 (BOD5 )为 (1.5 2± 0 .67)mg L ;溶解氧 (DO)平均值为 (8.2 9± 0 .68)mg L。
Hydrochemitry of the coast along Caojing, Hangzhou Bay was studied from January to May in 1999. The results are summarized as follows: Total salt content was about 16.09±2.17g/L; Alkalinity was 1.61± 0.61mmol/L ; pH was 8.00±0.12. Cl -(8.37±1.23g/L) and Na ++K +(5.05±0.72g/L) were the richest among those anion and kation ions, thus water of this area had obvious estuary characteristics and subordinated to seawater style, namely Cl Na Ⅲ. Contents of effective nitrogen(N t) in the area were rich, N t content reached 2.01± 0.40 mg/L, in which NH 3 N t amounting to 52.9%; NO - 3 N amounting to 46.6% and NO - 2-N amounting to 0.5% ; Content of effective phosphorus was 0.021±0.010mg/L; N/P was 212; the chemical oxygen consumption (COD Mn ) was 10.59±1.42mg/L; BOD 5 1.52±0.67mg/L. Dissolved oxygen was 8.29±0.68mg/L.
出处
《上海水产大学学报》
CSCD
2000年第3期200-203,共4页
Journal of Shanghai Fisheries University
关键词
水化学
有效氮
有效磷
海水养殖
河口水
coast
Hydrochemistry
effective nitrogen
effective phosphorus
