Study on Chl-a Concentration in Yuehai National Wetland Park Using Remote Sensing Data

Remote sensing technology has the advantages of fast analysis speed, large amount of information, wide coverage, and reliable results in water ecological environment. Chlorophyll is one of the important parameters to evaluate the eutrophication degree of water, and the concentration of chlorophyll-a (Chl-a) has been widely used in measuring the biomass of phytoplankton, warning and detection of red tide. The changes of water mass can be clearly obtained by analyzing the changes of Chl-a in space and time. This research selects the Yuehai National Wetland Park in Yinchuan City, China as the study area, based on a total of 15 Sentinel-2 remote sensing images from years 2019 to 2022. This research makes use of Chl-a related remote sensing band, and the natural recursive algorithm is carried out to obtain the Chl-a concentration in the study area. The results can be useful for the water quality monitoring.