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Article

Monitoring Water Quality of the Haihe River Based on Ground-Based Hyperspectral Remote Sensing

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Tianjin Key Laboratory of Aqua-Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China
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CAS Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
*
Author to whom correspondence should be addressed.
Academic Editors: Zheng Duan and Babak Mohammadi
Water 2022, 14(1), 22; https://doi.org/10.3390/w14010022
Received: 3 November 2021 / Revised: 18 December 2021 / Accepted: 19 December 2021 / Published: 22 December 2021
The Haihe River is a typical sluice-controlled river in the north of China. The construction and operation of sluice dams change the flow and other hydrological factors of rivers, which have adverse effects on water, making it difficult to study the characteristics of water quality change and water environment control in northern rivers. In recent years, remote sensing has been widely used in water quality monitoring. However, due to the low signal-to-noise ratio (SNR) and the limitation of instrument resolution, satellite remote sensing is still a challenge to inland water quality monitoring. Ground-based hyperspectral remote sensing has a high temporal-spatial resolution and can be simply fixed in the water edge to achieve real-time continuous detection. A combination of hyperspectral remote sensing devices and BP neural networks is used in the current research to invert water quality parameters. The measured values and remote sensing reflectance of eight water quality parameters (chlorophyll-a (Chl-a), phycocyanin (PC), total suspended sediments (TSS), total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH4-N), nitrate-nitrogen (NO3-N), and pH) were modeled and verified. The results show that the performance R2 of the training model is above 80%, and the performance R2 of the verification model is above 70%. In the training model, the highest fitting degree is TN (R2 = 1, RMSE = 0.0012 mg/L), and the lowest fitting degree is PC (R2 = 0.87, RMSE = 0.0011 mg/L). Therefore, the application of hyperspectral remote sensing technology to water quality detection in the Haihe River is a feasible method. The model built in the hyperspectral remote sensing equipment can help decision-makers to easily understand the real-time changes of water quality parameters. View Full-Text
Keywords: ground-based remote sensing; hyperspectral; water quality; BP neural network; Haihe River ground-based remote sensing; hyperspectral; water quality; BP neural network; Haihe River
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MDPI and ACS Style

Cao, Q.; Yu, G.; Sun, S.; Dou, Y.; Li, H.; Qiao, Z. Monitoring Water Quality of the Haihe River Based on Ground-Based Hyperspectral Remote Sensing. Water 2022, 14, 22. https://doi.org/10.3390/w14010022

AMA Style

Cao Q, Yu G, Sun S, Dou Y, Li H, Qiao Z. Monitoring Water Quality of the Haihe River Based on Ground-Based Hyperspectral Remote Sensing. Water. 2022; 14(1):22. https://doi.org/10.3390/w14010022

Chicago/Turabian Style

Cao, Qi, Gongliang Yu, Shengjie Sun, Yong Dou, Hua Li, and Zhiyi Qiao. 2022. "Monitoring Water Quality of the Haihe River Based on Ground-Based Hyperspectral Remote Sensing" Water 14, no. 1: 22. https://doi.org/10.3390/w14010022

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