永定河主要水化学特征及离子来源  

Main hydrochemical characteristics and ion sources of the Yongding River

作　　者：刘烨凌 尹慧慧 王璇 莫雁迪[1,2] 裴博群 肖雨龙 翟羽佳 王青 崔保山[1,2] 窦鹏[4] LIU Yeling;YIN Huihui;WANG Xuan;MO Yandi;PEI Boqun;XIAO Yulong;ZHAI Yujia;WANG Qing;CUI Baoshan;DOU Peng(State Key Laboratory of Wetland Conservation and Restoration,School of Environment,Beijing Normal University,Beijing 100875,China;Yellow River Estuary Wetland Ecosystem Observation and Research Station,Ministry of Education,Dongying 257509,China;Advanced Insititute of Natural Sciences,Bejing Normal University at Zhuhai,Zhuhai 519087,China;Beijing Water Science and Technology Institute,Beijing 100048,China)

机构地区：[1]北京师范大学环境学院湿地环境保护与生态修复全国重点实验室,北京10087 [2]黄河口湿地生态系统教育部野外科学观测研究站,257509 [3]山东东营北京师范大学珠海校区自然科学高等研究院,广东珠海519087 [4]北京市水科学技术研究院,北京100048

出　　处：《环境工程》2025年第2期87-95,共9页Environmental Engineering

基　　金：国家自然科学基金重点项目(42330705);科技基础资源调查专项资助(2022FY100304)。

摘　　要：永定河是京津冀地区的主要水源之一,厘清永定河流域水化学特征和离子来源对京津冀地区的水资源管理和社会发展具有重要意义。综合利用质量平衡法和离子比值法分析了永定河官厅水库至入海处干流和支流的水化学特征及主要离子来源。结果表明:永定河春季主要的水化学类型是SO_(4)·Cl-Na和HCO_(3)-Ca;河水呈微碱性,EC和TDS浓度较高,且支流平均值高于干流。干流Na^(+)、K^(+)、Cl^(-)、NO_(3)^(-)的浓度从上游到下游呈上升趋势,均值在入海段最高。各样点河流离子来源主要由大气降水(2.19%~11.38%)、人类活动(0.06%~50.69%)、蒸发岩溶解(6.47%~52.13%)、硅酸岩石风化(5.74%~71.23%)和碳酸岩风化(0.24%~60.06%)输入控制,山峡段和平原段的岩石风化贡献率(85%)显著高于中下游地区(71.5%)。The Yongding River is one of the main water sources in the Beijing Tianjin Hebei Region.Understanding the hydrochemical characteristics and ion sources of the Yongding River basin is of great significance for water resource management and social development in the Beijing Tianjin Hebei Region.This study comprehensively utilized the mass balance method and ion ratio method to analyze the hydrochemical characteristics and main ion sources in the mainstream and tributaries from the Guanting Reservoir to the mouth of the Yongding River.The results indicated that the main hydrochemical types of the Yongding River in spring were SO_(4)·Cl-Na and HCO_(3)-Ca.The river water was slightly alkaline,with high values of EC and TDS,and the average values of tributaries were higher than those of the mainstream.The spatial variation of ions'concentration in river water was significant,and the concentrations of Na^(+)、K^(+)、Cl^(-)、NO_(3)^(-)in the mainstream of Yongding River showed an upward trend from upstream to downstream,with the highest mean value in the Coastal Plain Section(CPS)in the river.The sources of river water ions in various locations were mainly controlled by atmospheric precipitation(2.19%to 11.38%),human activities(0.06%to 50.69%),evaporite dissolution(6.47%to 52.13%),silicate rock weathering(5.74%to 71.23%),and carbonate rock weathering(0.24%to 60.06%)inputs,with rock weathering being the main source of river ions in spring.The contribution rate of rock weathering in the upstream Mountain Gorge Section(MGS)and Urban Plain Section(UPS)(85%)was significantly higher than that in the middle and lower reaches(71.5%),where human activities contributed more.The impact of urban domestic sewage on the Yongding River in spring was more significant,while the impact of agriculture and industry on the river was limited.

关 键 词：水化学特征 岩石风化 离子来源 人类活动 永定河 京津冀地区 

分 类 号：P641.3[天文地球—地质矿产勘探] X522[天文地球—地质学]