Spatiotemporal Evolution of Chlorophyll-a Concentration From MODIS Data Inversion in the Middle and Lower Reaches of the Hanjiang River, China Zhuo Chen Zhengzhou University Ming Dou (
[email protected] ) Zhengzhou University https://orcid.org/0000-0002-4981-350X Rui Xia Chinese Research Academy of Environmental Sciences Guiqiu Li Zhengzhou University Lisha Shen Zhengzhou University Research Article Keywords: MODIS, chlorophyll-a, algal blooms, Hanjiang River Posted Date: July 15th, 2021 DOI: https://doi.org/10.21203/rs.3.rs-608935/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License 1 Spatiotemporal evolution of chlorophyll-a concentration from MODIS 2 data inversion in the middle and lower reaches of the Hanjiang River, 3 China 4 Zhuo Chen a, Ming Dou a,b *, Rui Xia c,, Guiqiu Li a,b, Lisha Shen a,b 5 a School of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou, 6 450001, China 7 b School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China 8 c State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research 9 Academy of Environmental Sciences, Beijing, 100012, China 10 Corresponding Author: Ming Dou E-mail address:
[email protected] 11 12 Abstract: The global construction of water projects has led to a clear trend of river and lake reservoir 13 formation, spurring increasingly serious ecological environmental deterioration, especially that 14 caused by the frequent occurrence of water blooms. Because of monitoring technology limitations, 15 monitoring the algae content index in water has lagged behind the conventional water quality index, 16 which makes sample monitoring too sparse in many rivers and the monitoring data incoherent, so it 17 cannot truly reflect the evolution of water eutrophication.