The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System
Precipitation is considered a key factor influencing the fluorescent dissolved organic matter (FDOM) of urban rivers. However, the multiple effects of precipitation on FDOM in urban rivers and the long-term impacts of precipitation on the spatial patterns of FDOM are seldom known. Spatiotemporal var...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/15/2323 |
| _version_ | 1797411875842949120 |
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| author | Jiashuai Yang Chan Gao Xuantong Zhang |
| author_facet | Jiashuai Yang Chan Gao Xuantong Zhang |
| author_sort | Jiashuai Yang |
| collection | DOAJ |
| description | Precipitation is considered a key factor influencing the fluorescent dissolved organic matter (FDOM) of urban rivers. However, the multiple effects of precipitation on FDOM in urban rivers and the long-term impacts of precipitation on the spatial patterns of FDOM are seldom known. Spatiotemporal variations of FDOM at 36 sites from the urban rivers of Jinan City during dry and wet seasons were investigated in this study. Four components were identified using an excitation–emission matrix and parallel factor analysis. Overall, the total fluorescence intensities in dry and wet seasons ranged from 6.59 to 35.7 quinine sulfate units (QSU) and 3.42 to 69.3 QSU, respectively. Significant variations were found for different components that C2 and C3 declined but C4 increased in the wet season (<i>p</i> < 0.05). The temporal variations for different components could be explained by the different combined effects of precipitation dilution and flushing. Three different reference FDOM sources, including background water, spring water, and wastewater treatment plant (WWTP) outlets, were illustrated using principal coordinate analysis (PCoA). The places of FDOM in most sites were more closed to the PCoA location of WWTP outlets in the dry season while central shifted in the wet season. The changes of FDOM sources in the wet season could be explained by the mixed effect of precipitation. In conclusion, this study provided new insights into the multiple impacts of precipitation on FDOM in urban river systems, and also data support for precise pollution discharge and water resource management. |
| first_indexed | 2024-03-09T04:52:36Z |
| format | Article |
| id | doaj.art-128b1b453b4f49edbc91173d59625971 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T04:52:36Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-128b1b453b4f49edbc91173d596259712023-12-03T13:08:18ZengMDPI AGWater2073-44412022-07-011415232310.3390/w14152323The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River SystemJiashuai Yang0Chan Gao1Xuantong Zhang2College of Urban and Environmental Sciences, Peking University, No.5 Yiheyuan Road, Haidian District, Beijing 100871, ChinaChemical Science College, University Bordeaux, UMR EPOC CNRS 5805, F-33400 Talence, FranceChina Academy of Building Research, No. 30 Beisanhuan East Road, Chaoyang District, Beijing 100029, ChinaPrecipitation is considered a key factor influencing the fluorescent dissolved organic matter (FDOM) of urban rivers. However, the multiple effects of precipitation on FDOM in urban rivers and the long-term impacts of precipitation on the spatial patterns of FDOM are seldom known. Spatiotemporal variations of FDOM at 36 sites from the urban rivers of Jinan City during dry and wet seasons were investigated in this study. Four components were identified using an excitation–emission matrix and parallel factor analysis. Overall, the total fluorescence intensities in dry and wet seasons ranged from 6.59 to 35.7 quinine sulfate units (QSU) and 3.42 to 69.3 QSU, respectively. Significant variations were found for different components that C2 and C3 declined but C4 increased in the wet season (<i>p</i> < 0.05). The temporal variations for different components could be explained by the different combined effects of precipitation dilution and flushing. Three different reference FDOM sources, including background water, spring water, and wastewater treatment plant (WWTP) outlets, were illustrated using principal coordinate analysis (PCoA). The places of FDOM in most sites were more closed to the PCoA location of WWTP outlets in the dry season while central shifted in the wet season. The changes of FDOM sources in the wet season could be explained by the mixed effect of precipitation. In conclusion, this study provided new insights into the multiple impacts of precipitation on FDOM in urban river systems, and also data support for precise pollution discharge and water resource management.https://www.mdpi.com/2073-4441/14/15/2323precipitationfluorescent dissolved organic matter (FDOM)spatiotemporal variationsprincipal coordinates analysis (PCoA)EEM-PARAFACXiaoqing River |
| spellingShingle | Jiashuai Yang Chan Gao Xuantong Zhang The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System Water precipitation fluorescent dissolved organic matter (FDOM) spatiotemporal variations principal coordinates analysis (PCoA) EEM-PARAFAC Xiaoqing River |
| title | The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System |
| title_full | The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System |
| title_fullStr | The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System |
| title_full_unstemmed | The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System |
| title_short | The Impacts of Precipitation on Fluorescent Dissolved Organic Matter (FDOM) in an Urban River System |
| title_sort | impacts of precipitation on fluorescent dissolved organic matter fdom in an urban river system |
| topic | precipitation fluorescent dissolved organic matter (FDOM) spatiotemporal variations principal coordinates analysis (PCoA) EEM-PARAFAC Xiaoqing River |
| url | https://www.mdpi.com/2073-4441/14/15/2323 |
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