【摘要】 根据作者在湖北省武汉市东湖测定降水中化学组分含量的资料,总结了东湖降水中磷酸盐的含量、周年变化和降水的主要离子组成。降水中磷酸盐的含量,一年中以秋季最高,冬季次之,春夏季最低。降水主要离子组成,阴离子以SO₄^2-占优势,阳离子以K⁺十Na⁺占主要部分,属于硫酸盐类钾钠组第Ⅱ型。根据降水中磷酸盐的含量及降雨量,计算了周年由降水通过湖面输入东湖及流域的磷酸盐量。更多还原

【Abstract】 The paper summed up the content, annual variation and main ion composition of phosphate in precipitation in Donghu Lake, Wuhan. The annual input of phosphate into the lake by precipitation and inflows were calculated. The content of phosphate in precipitation in Donghu Lake, Wuhan was in trace——0.452 mg PO₄^3-/l. The average, annual value for 1962—1963 was 0.072mg PO₄^3-/l. The highest was in autumn (averaging 0.096 mg PO₄^3--/1), lower in winter （0.072）, and the lowest in spring and summer （0.065 and 0.053）. The abundant anion in the precipitation was SO₄^2-, amounting 43.98% of the total volume of the main ion milliequivalents. Among the cation the main ions were K⁺+Na⁺, amounting 42.22% of the total volume of the main ion milli-equivalents. The precipitation belonged to the second form in K+Na of suphate class, S_II^K+Na, The pH value varied between 6.1 and 7.8. The total solid was 76.4 mg/l and the N/Pvalue was 6.2:1. The annual input of phosphate through lake surface by precipitation was 2.93 ton, and the input into its basin was 19.62 ton.更多还原