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Jiang G, Chen S, Wang X, Deng W, Zhuang Z, Zeng L, Zhang C, Yu W. Water optical properties over or around coral reefs in the coastal region: implications for coral reef remote sensing. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:92768-92781. [PMID: 37493907 DOI: 10.1007/s11356-023-28870-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 07/14/2023] [Indexed: 07/27/2023]
Abstract
Coral reefs inhabit clear oceanic-type waters to turbid coastal regimes. For shallow coastal water environments, the coral reefs from remote sensing will be substantially influenced by the complexity and heterogeneity of the optical properties of water. Through a set of bio-optical and chemical measurements in July 2019 around Xidao Island, Sanya, China, we explored spatial variations of water components' concentrations (including suspended solids, phytoplankton, and dissolved organic carbon) and the optical absorptions (i.e., particulate pigments, detritus, and colored dissolved organic matter) in waters over or around coral reefs; further analysis of their influences upon the remote sensing reflectance (Rrs(λ)) of water was performed. It was observed that the bio-optical and chemical properties of the waters over or around coral reefs were spatially and vertically heterogeneous for different sampling sites. As expected, the suspended solids dominated the optical properties of coral reefs waters in areas of Xidao Island, which evidently influenced the Rrs(λ), especially for the surface waters (Pearson r > 0.60, p < 0.01). In addition, the dissolved organic carbon concentrations exhibited significant relations to the Rrs(λ) both in surface and bottom water layers, whereas the colored dissolved organic matter showed a weak negative correlation with the Rrs(λ). These findings will support the mapping and monitoring benthic habitats with remote sensing imagery in coastal regions, especially when a removal of the influence by particulate sediments was available.
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Affiliation(s)
- Guangjia Jiang
- South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China
- Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou, 510300, China
- Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Shuisen Chen
- Guangdong Open Laboratory of Geospatial Information Technology and Application, Guangdong Engineering Technology Center for Remote Sensing Big Data Application, Guangdong Key Laboratory of Remote Sensing and GIS Technology Application, Guangzhou Institute of Geography, Guangzhou, 510070, China
| | - Xinrui Wang
- South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China
- Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou, 510300, China
| | - Wei Deng
- South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China
- Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou, 510300, China
| | - Zebin Zhuang
- South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China.
- Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou, 510300, China.
| | - Lihong Zeng
- South China Sea Prediction Center, State Oceanic Administration, Guangzhou, 510310, China
| | - Chunchao Zhang
- South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China
- Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou, 510300, China
| | - Wei Yu
- South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China
- Nansha Islands Coral Reef Ecosystem National Observation and Research Station, Guangzhou, 510300, China
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Khan MJ, Shah BA, Nasir B. Groundwater quality assessment for drinking purpose: a case study from Sindh Industrial Trading Estate, Karachi, Pakistan. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40808-019-00676-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Naseem S, Bashir E, Ahmed P, Rafique T, Hamza S, Kaleem M. Impact of Seawater Intrusion on the Geochemistry of Groundwater of Gwadar District, Balochistan and Its Appraisal for Drinking Water Quality. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/s13369-017-2679-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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