黄淮海平原封丘试区水体理化性状的多元分析

PHYSICOCHEMICAL CHARACTERISTICS AND MULTIVARIATE ANALYSIS OF WATERS IN FENGQIU EXPERIMENTAL DISTRICT IN THE HUANGHUAIHAI PLAIN, HENAN PROVINCE

在封丘试区内两个最具代表性水体(曹岗湖,潘店芦苇荡)水质调查的基础上,对主要水质指标及其集合进行方差分析和聚类分析,结果表明:封丘试区水体具有典型的北方水体特征,其水质的变化主要受季节影响,水体间无甚大差别。各水体pH值偏高(年平均值为8.0—9.0),属弱碱性;硬度较大(17.54—20.63德国度),均属硬水且有逐年上升趋势;离子总量较大(860—1448mg/L);碱度(4.57—5.20me/L)和主要营养物含量(总氮1.31—2.08mg/L,总磷0.100—0.135mg/L)较高,属富营养型水体。文中指出:该试区水体水质状况较好,渔业开发潜力较大,但磷是水体生物生产力的主要限制性营养物。

Analysis of variance and cluster analysis were made on several parameters of water quality for two representative water bodies (Caogang Lake, Pandian reed marshes) in the Fengqiu Experimental District. The results showed that water quality was typical in Northern China and was usually influenced seasonality. There were no apparent differences in water quality between the two water bodies. The pH value was relatively high (annual means, 8.0—9.0) and the water was weakly alkaline. The hardness was high (17 54—20.63) and tended to increase over the years. The waters were rich in ions, with high alkality (4.57—5.20me/L) and concentrations of nutrient salts (eg, TN:1.31—2.08mg/L, TP:0.100—0.135mg/L). In conclusion, the water bodies have good water quality and high potential for fishery development. Phosphorous may be the major limited nutrient for aquatic productivity.