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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。
This paper reports the water chemistry of the estuarine waters used for aquaculture in Caojing, Jinshan, Hangzhou Bay from January to May 1999: total salinity (16.9 ± 2.17) g L, alkalinity (1.61 ± 0 .61) mmol L; pH was 8.0 0 ± 0.12; Cl- with (8.37 ± 1.2 3) g L and (+0.5 ± 0.72) g L Na + + K +, for the typical estuary water quality characteristics. Is a type of seawater quality, namely, chloride water, sodium group, type Ⅲ (ClNa Ⅲ). Conventional water quality indicators were as follows: Nt was (2.01 ± 0.40) mg L, of which NH3-Nt accounted for 52.9%, NO-3-N accounted for 46.6% and NO-2-N accounted for 0%. 5%; PO3-4-P content of available phosphorus was (0. 02 1 ± 0. 0 10) mg L; NPP was 2 12 (atomic ratio); chemical oxygen demand (CODMn) 10.59 ± 1.42) mg L; BOD5 was (1.5 2 ± 0.67) mg L on day 5; and the average dissolved oxygen (DO) was (8.2 9 ± 0.68) mg L.