摘要
为探究沉湖国际重要湿地水化学特征及物质来源,服务沉湖湿地生态环境保护和系统修复,分别于2020年8和12月系统采集湿地湖区主要河流黄丝河河水、3个子湖(沉湖、张家大湖、王家涉湖)湖水样品和湿地周边地下水样品,综合运用水化学和统计分析方法,分析湿地河湖水主要离子组成特征与空间分布,探讨湿地化学演化过程的主要控制因子和离子来源。结果表明:沉湖河湖水整体呈中性至弱碱性,含量最高的阴阳离子分别为HCO_(3)-和Ca^(2+),水化学类型主要为HCO_(3)-Ca型。枯水期由于水动力条件差,河湖水各组分含量空间差异性大于丰水期。河湖水离子主要来源于碳酸盐岩和硅酸盐岩风化溶解,同时枯水期黄丝河水、王家涉湖水和地下水也受阳离子交换作用的影响。丰水期受农业活动和生活污水影响,枯水期受工矿活动影响,湿地的水化学组成受到自然和人类活动的共同作用。
To investigate the hydrochemical characteristics and controls of surface water and groundwater in Chen Lake Wetland,the water samples of inflowing rivers and main lakes were collected and analyzed in August(rainy season)and December(dry season)2020.The results showed that the surface water was neutral to weakly alkaline.HCO_(3)-and Ca^(2+)were the most abundant anions and cations,respectively,and the main hydrochemical type was HCO_(3)-Ca.Surface water components were mainly derived from weathering and dissolution of carbonate rocks and silicate rocks,and were also influenced by cation exchange.The spatial variability of surface water compositions increased from wet season to dry season due to weakening hydrodynamic conditions.The chemical composition of surface water in the wet season was affected by agricultural activities and domestic sewage,and was affected by industrial and mining activities in the dry season,respectively.These observations demonstrated how the hydrochemical composition of the wetland was controlled by a combination of natural factors and human activities.
作者
张雅
刘力
李朋
李琳静
潘龙克
冯江
叶婷
ZHANG Ya;LIU Li;LI Peng;LI Lin-jing;PAN Long-ke;FENG Jiang;YE Ting(Hubei Geological Survey,Wuhan 430034,China;Administration of Chenhu Wetland Nature Reserve,Caidian District,Wuhan City,Wuhan 431608,China)
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2023年第12期2625-2637,共13页
Resources and Environment in the Yangtze Basin
基金
武汉市财政项目(WHDYS-2020-010)
湖北省地质局民生地质项目(MSDZ202316)。
关键词
地表水
水化学
离子来源
沉湖湿地
surface water
hydrochemistry
ion source
Chen Lake wetland
