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引用本文:王迪,张飞,张兆永,张海威,朱世丹,张贤龙.新疆艾比湖流域枯、丰水期三维荧光光谱特性及其与水质的关系.湖泊科学,2020,32(2):483-495. DOI:10.18307/2020.0217
WANG Di,ZHANG Fei,ZHANG Zhaoyong,ZHANG Haiwei,ZHU Shidan,ZHANG Xianlong.Characteristics of three-dimensional fluorescence spectra and its correlation with water quality of surface water during dry and wet seasons in Lake Ebinur Watershed, Xinjiang. J. Lake Sci.2020,32(2):483-495. DOI:10.18307/2020.0217
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新疆艾比湖流域枯、丰水期三维荧光光谱特性及其与水质的关系
王迪1,2, 张飞1,2,3, 张兆永1,2, 张海威4, 朱世丹1,2, 张贤龙1,2
1.新疆大学资源与环境科学学院智慧城市与环境建模自治区普通高校重点实验室, 乌鲁木齐 830046;2.新疆大学绿洲生态教育部重点实验室, 乌鲁木齐 830046;3.中亚地理信息开发利用国家测绘地理信息局工程技术研究中心, 乌鲁木齐 830046;4.南京师范大学地理科学学院, 南京 210046
摘要:
以艾比湖流域主要入湖河流为研究对象,在5月(丰水期)和8月(枯水期)分别沿博尔塔拉河(博河)和精河进行采样,采用平行因子模型(PARAFAC)和三维荧光区域积分法对水体三维荧光特性进行研究并对其与水质的关系在枯、丰水期下的变化进行探讨.结果表明①河流DOM在枯水期与丰水期都含有C1(240、425 nm) UVC类腐殖质,C2(225、290 nm)紫外区内络氨酸类有机物,C3(230/280、330 nm)蛋白类有机物,C4(265、260 nm)腐殖质类共4种组分.通过对水体三维荧光进行区域积分可以看出DOM荧光成分的占比在不同时期的变化.博河在枯水期时EEM光谱中的区域Ⅲ富里酸含量低于丰水期,枯水期时区域Ⅱ芳香类蛋白质、区域Ⅳ可溶性微生物代谢物以及区域Ⅴ类腐殖质酸高于丰水期;对于精河来说,区域Ⅱ芳香类蛋白质和区域Ⅳ可溶性微生物代谢物在枯水期的含量高于丰水期,区域Ⅲ富里酸和区域Ⅴ类腐殖质酸的含量枯水期低于丰水期,这表明水体腐质化程度较高.②本研究选取了一些常规的荧光指数来描述枯、丰水期水体的荧光指数特性.经研究发现,精河的荧光指数、自生源指数和腐殖化指数在不同时期的变化幅度较小,而博河的变化幅度较大.③将荧光指数与水质参数进行相关性分析并建模,结果表明枯水期自生源指数(BIX)与化学需氧量呈显著正相关,相关系数R=0.688;丰水期时BIX与铵态氮浓度呈显著负相关,相关系数R=-0.493.通过对比分析艾比湖主要入湖河流的三维荧光光谱特性与水质在枯、丰水期时的关系进一步表明水体中DOM的特性以及在枯、丰水期下的差异,为艾比湖流域的治理改善提供一定的理论支持和参考依据.
关键词:  艾比湖流域  水质  三维荧光光谱及平行因子法  荧光区域积分法  荧光指数  博尔塔拉河  精河
DOI:10.18307/2020.0217
分类号:
基金项目:新疆本地优秀青年培养专项(U1503302)、自治区人民政府公派出国留学成组配套项目(L06)和新疆维吾尔自治区天山英才项目(400070010209)联合资助.
Characteristics of three-dimensional fluorescence spectra and its correlation with water quality of surface water during dry and wet seasons in Lake Ebinur Watershed, Xinjiang
WANG Di1,2, ZHANG Fei1,2,3, ZHANG Zhaoyong1,2, ZHANG Haiwei4, ZHU Shidan1,2, ZHANG Xianlong1,2
1.Key Laboratory of Smart City and Environmental Modeling of Higher Education Institute, College of Resources and Environment Sciences, Xinjiang University, Urumqi 830046, P. R. China;2.Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi 830046, P. R. China;3.Engineering Research Center of Central Asia Geoinformation Development and Utilization, National Administration of Surveying, Mapping and Geoinformation, Urumqi 830046, P. R. China;4.School of Geographical Sciences, Nanjing Normal University, Nanjing 210046, P. R. China
Abstract:
This study takes the main lakes in Lake Ebinur Watershed as the research object, and samples along the Bortala River and Jing River in May (wet season) and August (dry season). The PARAFAC analysis method and the three-dimensional fluorescence region integration method is used to study the three-dimensional fluorescence characteristics of water and its seasonal variation with water quality. The results show that:1)In both dry and wet seasons, river DOM contains C1 (240, 425 nm) and C4 (265, 260 nm) kind of humus, C2 (225, 290 nm) uranium-like organic matter compounds. It found that fulvic acid is lower, while the aromatic protein, soluble microbial and humic acid were highest in dry season than wet season in Bortala River. The concentration of the aromatic protein and soluble microbial in dry season was higher than in wet season, and the fulvic acid and humic acid in dry season was lower than in the wet season in Jing River, based on fluorescence regional integral (FRI) analysis and the regional standards related to water quality and fluorescence. This indicates that the degree of decomposition in water is relatively high; 2)In this study, some conventional fluorescence indexes were selected to describe the fluorescence index characteristics of water in wet and dry season. It found that the three indexes (FI, BIX, HIX) of the water quality of Jing River and Bortala River in dry and wet seasons showed slight changes, comparing to larger changes in the Bortala River. In general, the change of water quality of Jing River and Bortala River in dry and wet seasons is mainly influenced by microbial activities and human activities; 3) In terms of the correlation coefficients of water quality parameters and fluorescence indexes in different seasons, the results showed that the relationship between BIX and COD concentration was best and a significant positive correlation in dry season(R=0.688, P<0.01). Secondly, there is a significant negative correlation between BIX and ammonium nitrogen concentration in wet season (R=-0.493, P<0.05). The study provides theoretical support and reference basis for the improvement of the governance of Lake Ebinur Watershed, which further proved that exogenous characteristics and the differences in different periods of DOM sources in the water.
Key words:  Lake Ebinur Watershed  water quality  three-dimensional fluorescence and PARAFAC analysis method  FRI analysis and the regional standards  fluorescence index  Bortala River  Jing River
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