硅藻指数在龙江与刁江流域生态健康评价中的应用  

Application of Diatom Index in Ecological Health Evaluation of Longjiang and Diaojiang River Basin

作　　者：张昆 蔡德所[1] 林金城 散剑娣 谢紫珺 ZHANG Kun;CAI De-suo;LIN Jin-cheng;SAN Jian-di;XIE Zi-jun(College of Hydraulic and Environmental Engineering,Three Gorges University,Yichang 443002,Hubei Province,China;PowerChina Guiyang Engineering Co.Ltd.,Guiyang 550081,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]中国电建集团贵阳勘测设计研究院有限公司,贵阳550081

出　　处：《中国农村水利水电》2021年第4期98-106,共9页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51439003,40971280,40971280)。

摘　　要：应用硅藻指数来评价龙江与刁江的水生态健康状况,分别在龙江和刁江流域设置16个样点进行调查研究。鉴定结果表明:龙江流域鉴定出硅藻28属121种,刁江流域鉴定出硅藻23属114种,共同优势属为舟形藻属、曲壳藻属、菱形藻属、桥弯藻属、异极藻属。对目前较成熟的16项硅藻指数,通过因子分析、聚类分析、箱型图分析等多种统计分析方法研究硅藻指数的适用性。研究结果表明:大多数硅藻指数与TP、TN、Cond、pH显著相关与V极显著相关,仅WAT指数与NO3-N显著相关。优选出IPS、IDG、CEE 3项指数作为该地区水质评价的参考生物指标。通过硅藻指数综合判别得出龙江样点均为良好及中等水质,刁江样点有少部分处于良好等级水质,73%的样点水质处于中等和差等水质,龙江水质整体水平要好于刁江。The diatom index is used to evaluate the water ecological health of Longjiang and Diaojiang,and 16 sample points are set up in the Longjiang and Diaojiang basins for investigation and research.The identification results show that 30 genera and 141 species of diatoms are identified in the Longjiang River Basin,and 138 species of diatoms in 24 genera are identified in the Diaojiang River Basin.The common dominant genera are Navicula,Trichothecium,Nitzschia,Hydracea Heterophaga.For the currently more mature sixteen diatom indexes,the applicability of the diatom indexes is studied through factor analysis,cluster analysis,box diagram analysis and other statistical analysis methods.The results show that most of the diatom indexes are significantly correlated with TP,TN,Cond,pH and extremely significantly correlated with V,and only the WAT index is significantly correlated with NO3-N.Three indexes of IPS,IDG and CEE are selected as reference biological indicators for water quality evaluation in this area.Through a comprehensive judgment of the diatom index,it is concluded that the Longjiang samples are of good and medium water quality,a small part of the Diaojiang samples are of good grade water quality,73%of the samples are of medium or poor water quality,and the overall water quality of Longjiang is better than that of Diaojiang.

关 键 词：龙江 刁江 硅藻 生态健康评价 

分 类 号：TV21[水利工程—水文学及水资源] X824[环境科学与工程—环境工程]