Remote sensing identification of red tide in Pearl River Estuary based on hue angle algorithm
To realize the red tide identification of Pearl River Estuary with high resolution remote sensing,and to scientifically support red tide disaster prevention and mitigation work.This paper used the high spatial resolution data of the coastal zone imager carried by Haiyang-1C/D satellite,together with the analysis of the spectral characteristics of remote sensing images of turbid water,clean water and red tide in the Pearl River Estuary,to identify red tide by calculating the water hue angle and combining with visual interpretation.This method was used to successfully identify the Cochlodinium geminatum red tide in the Pearl River Estuary from October 26 to November 6,2020.The hue angle can be used to identify the red tide in the Pearl River Estuary.The hue angle of red tide water varies from 58° to 61°,which has a good identification effect on small area red tide during their initiation,low density red tide and red tide in strip distributed areas.
国家科技期刊平台
NSTL
万方数据
维普
