摘要
为研究水库调蓄对水环境变化的影响,以某平原地区作为研究区域,结合南水北调水库调蓄工程,对调水沿线水环境及受水区水环境进行监测,并在南水北调水长期回补的情况下做预测。监测数据表明:在南水北调水源调水沿程上,水质总体优良。2018年和2019年2次调水,地下水资源回补涵养效果显著,河水回补显著改善了地下水的硬度和NO_(2)-N浓度,受监测井氯离子浓度有明显的减小趋势;南水与地下水的部分水质指标表现出较为显著的差异性;停止补水后,与补水初期相比,地下水中的溶解性总固体浓度大幅降低,电导率也普遍降低,地下水的总硬度普遍降低。溶质运移预测结果表明水库调蓄后水源入渗,对地下水水质有所改善,随着调水量的持续增加,氯离子浓度迅速下降,持续回补对氯离子的稀释作用较明显。
In order to study the influence of reservoir regulation and storage on water environment change,with a plain area as the research area,combined with the regulation and storage works of the South-to-North Water Transfer Project,the water environment along the water transfer route and in the receiving area are monitored,and prediction is made under the condition of long-term water recharge of the South-to-North Water Transfer Project.The monitoring data show the water quality is generally good along the transfer route.Two times of water transfer in 2018 and 2019 renders significant effects of groundwater recharge and conservation.The river water recharge significantly improve the hardness and NO_(2)-N concentration of the groundwater,and the chloride ion concentration in the monitoring wells show an obvious decreasing trend.Some water quality indexes of south water show significant difference from that of groundwater.After stop of water filling,compared with the early period of filling,the total soluble solids concentration in groundwater greatly reduced,the conductivity and the total hardness in groundwater generally become lower.The results of solute migration prediction demonstrate that water infiltration after reservoir regulation and storage renders certain improvement of ground water quality.With the continuous increase of transferred water,the chlorine ion concentration drops rapidly,indicating continuous recharge has significant dilution effects to chloride ion.
作者
孙冬冬
SUN Dong-dong(Linyi Water Conservancy and Hydropower Project Construction Supervision Center,Linyi 276000,China)
出处
《广西水利水电》
2021年第5期57-60,67,共5页
Guangxi Water Resources & Hydropower Engineering
关键词
水库调蓄
水环境
地下水质
南水北调
Reservoir regulation and storage
water environment
groundwater quality
South-to-North Water Transfer
