区域调水对杭嘉湖水体溶解氧改善效果分析

Evaluation and Assessment of Dissolved Oxygen based on the Water Diversion Experiment in River Network of Hangjiahu Basin

文章在相关研究的基础上,根据2015年调水试验的数据成果,对区域水体溶解氧的改善效果进行了系统分析。首先从整体上对调水试验前后监测断面水质类别的变化进行了分析评价;其次,对调水试验前后嘉兴河网地区中溶解氧浓度的时空变化进行了综合分析,结果显示,在空间上,嘉兴北部地区的改善效果最为明显,在时间上,不同断面的溶解氧浓度变化各异;最后,以试验的3个阶段为对象,对试验效果进行了阶段性评价并进行了影响分析,结果显示,在太浦闸下泄流量增大及南排工程各闸门开度扩大的综合作用下,试验第二阶段溶解氧浓度改善效果最佳。本次研究成果将为未来太湖流域实现常态化调水提供参考。

In this study,a systematic and comprehensive research is carried out based on the water diversion experiment in2015.The evaluation of dissolved oxygen concentration is firstly conducted based on the experimental data.The improvements of water quality in Jiaxing river network have been confirmed.Secondly,Spatio-temporal water quality analysis is executed and the results indicated the northern part of Jiaxing city shows the best result during the experiment.Finally,the analysis of the relationship between dissolved oxygen concentration and impact factors are carried out considering three different experimental stages,the second stage of the experiment show the best improvement of water quality due to the enhanced discharge of Taipu gate and enlarged opening of the southern project of Jiaxing city.This study will provide convincing results and references for future work.