摘要
北大港水库是天津市重要的调蓄水库,水库在蓄水后快速咸化,影响到水库功能的正常发挥。为解析北大港水库及周边水体的水质和主要影响离子,在2015~2017年的丰水期和枯水期分别采集北大港水库水库水和独流减河河水样,分析水体的水化学组成及时空特征。结果表明,河水、水库水的水化学类型分别是Na-Cl(HCO3)型和Na-Cl(SO4)型。由主成分分析可知,Cl-,SO42-,NO3-以及溶解氧(DO)四个指标是北大港水库水质的主要影响因子。基于模糊数学理论的水质综合评价表明,水库水和河水中96%的水体隶属于V类。在空间上,水体距离渤海湾越近,水质越差;由于独流减河径流量和入海水量的减少,河水的水质最差点从水库排咸闸处逐渐上移到水库十号口门进水闸处。本研究可为北大港水库的水质改善提供理论依据。
The Beidagang Reservoir is an important regulating reservoir in Tianjin.The water sanilization takes place quickly after water storage,which affects the normal function of the reservoir.In order to analyze the water quality and main influencing ions of the Beidagang Reservoir,we sampled the river water and reservoir water during the wet season and dry season from 2015 to 2017,respectively.The water chemical composition and charateristics in time and space of the water was analyzed.The results show that the water chemical types of river water,and reservoir water were Na-Cl(HCO3)type,Na-Cl(SO4),respectively.The result of principal component shows the Cl-,SO42-,NO3-and dissolved oxygen(DO)are the main influencing ions of Beidagang Reservoir.Comprehensive evaluation of water quality based on fuzzy mathematics theory shows that 96%of the water belongs to Class V water,and the water quality is poor.In Space,due to river runoff and reduction in seawater intake,the worst water quality of the Duliujian River was gradually moved from the lower sluice gate of the reservoir to the Reservoir No.10 gate intake sluice.This study can provide theoretical basis for the improvement of water quality in Beidagang Reservoir.
作者
何明霞
张兵
刘小龙
王中良
HE Mingxia;ZHANG Bing;LIU Xiaolong;WANG Zhongliang(Tianjin Key Laboratory of Water Resources and Environment,Tianjin Normal University,Tianjin 300387,China;School of Geographic and Environmental Sciences,Tianjin Normal University,Tianjin 300387,China)
出处
《水文》
CSCD
北大核心
2020年第4期91-96,共6页
Journal of China Hydrology
基金
国家自然科学基金项目(41971037)
天津市应用基础与前沿技术研究项目(15JCQNJC44200)。
关键词
北大港水库
水体咸化
主成分分析
模糊数学
水质评价
Beidagang reservoir
water salinization
principal component analysis
fuzzy mathematics
water quality evaluation
