摘要
为估算百花湖叶绿素a浓度,文章根据实测高光谱和水样分析,分别建立比值模型、荧光峰位置、一阶微分、反射峰面积(NPA)、峰谷距离、基线荧光峰高度(FLH)和三波段模型。同时,基于不同营养状态湖泊的水质数据,建立了适用于不同营养状态水体的叶绿素a估算模型。结果表明:基线荧光峰位置模型的估算效果最好,决定系数R2为0.93,F检验值为201;对比分析4种营养状态下几种估算模型效果得出,中营养化和轻度富营养化水体中,荧光峰位置模型和基线荧光峰高度模型的算法优于其它算法;中度富营养化和重度富营养化水体中,比值模型和三波段模型的估算效果较为理想。该研究结果可为百花湖水环境的监测提供一定的理论依据和技术参考。
Water environment monitoring was conducted in Baihua Lake of Guiyang City,during which the concentration of chlorophyll-a was to be estimated.For this purpose,several models,involving the ratio,fluorescence peak position,first order differential,reflection peak area,peak valley distance,baseline fluorescence peak height and three bands,were established on the basis of the data obtained from the hyperspectral measurements and monitoring of water quality of Baihua Lake.At the same time,different chlorophyll-a estimation model suitable for different trophic states was set up based on the water quality data.As a result,the baseline fluorescence peak position model(FLH)was proved to be the best in the estimation effects with its determination coefficient(R2)of 0.93,test coefficient(F)of 201;in addition,the results of several chlorophyll-a estimation models under four nutritional conditions were compared,which indicated the algorithms of fluorescence peak location model and baseline fluorescence peak height model were better than other algorithms when the Lake was in mesotrophic condition or moderate eutrophic condition;and the ratio model and three-band algorithm were the best on condition that the Lake was mild eutrophic and severe eutrophic.Hopefully,the results could provide the theoretical basis and technical reference for water environment monitoring in Baihua Lake.
作者
黄启会
贺中华
梁虹
杨朝晖
黄法苏
曾信波
李秋华
HUANG Qihui;HE Zhonghua;LIANG Hong;YANG Chaohui;HUANG Fasu;ZENG Xinbo;LI Qiuhua(School of Geography and Environmental Science,Guizhou Normal University,Guiyang 550001,China;School of Geography and Environmental Science,Guizhou Normal University/National Karst Rocky Desertification Control Engineering Technology Research Center,Guiyang 550001,China;Water Resources Department of Guizhou Province,Guiyang 550002,China;Key Lab for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province,Guizhou Normal University,Guiyang 550001,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第1期134-141,共8页
Environmental Science & Technology
基金
国家自然科学基金(41471032
u1612441)
贵州省国内一流学科建设项目(黔教科研发[2017]85号)
国家重大创新基地建设项目(黔科合计实验室[2011]4001号)
贵州省水利厅自然科研基金(KT201402)
贵州省科技厅自然科研基金(黔科合J字[2010]2026号
黔科合J字[2013]2208号)
贵州师范大学2015年博士科研启动项目
关键词
百花湖
高光谱
叶绿素A
浓度估算
Baihua Lake
hyperspectral
chlorophyll-a
concentration estimation
