黄浦江上游^18O同位素与水质指标的灰色关联分析

A Grey Correlation Analysis between δ^(18)O and Water Quality Indexes in the Upper Reaches of the Huangpu River

在2006年3月22日至4月6日开展的太浦河调水试验中,实施水量水质同步监测的同时,进行了同位素监测。在太浦闸闸供和泵供两种不同调度方式下,对黄埔江上游水源地3条主要支流的18O同位素与水质指标的分别进行了关联分析。分析结果表明,泵供期关联度普遍高于闸供期,无论闸供期和泵供期,CODMn与δ18O的关联度都最高,NH3-N与δ18O的关联度最低。结果表明,泵供期对关联度的影响较为明显。CODMn、CODCr、TP以及TN均与δ18O有着较高的关联度,存在着明显的相关关系。δ18O同水质指标的灰色关联分析只是初步的探讨,还有待于深入的研究。

During the experiment of diverting water from the Taipu River from March 22 to April 6 in 2006, synchronous isotope monitoring for water quantity and water quality was carried out. Combining water quality and isotope data, a grey correlation analysis has been made between major water quality indexes and δ^18O values during sluice-supply water period and the pump-supply water period. The correlation sequence of water quality indexes and δ^18O variation was CODMn〉TP〉CODcr〉TN〉DO〉NH3-N during the period of sluice-supply water, and that of water quality indexes and δ^18 O variation was CODMn〉TN〉CODCr〉DO〉TP〉NH3-N during the period of pump-supply water. Of the two different diverting methods, CODMn is in the first place in the sequence of correlation and NH3-N is in the last place in the sequence. Correlation degrees of TP and TN change obviously from sluice-supply water period to pump-supply water period. Furthermore, all the correlation degrees except TP during sluice-supply water period are higher than those during the pump-supply water period. Results show that pump-supply water have more obvious influence on the correlation degree. The value of COI）M., CODcr, TP and TN had high correlation with the value of δ^18O during the two periods.