The invention provides an intraday high-frequency automatic monitoring method and
system for lake
cyanobacterial bloom based on a GOCI-II
satellite, and aims to solve the problems that an existing method is susceptible to interference of thin cloud, low in recognition precision, high in
false positive rate, low in efficiency and the like, and the
processing flow depends on manpower. The
system is based on an improved AFAI index, fine
cloud detection, cloud expansion
processing and classification correction strategies are combined, misrecognition caused by thin clouds and shadows is effectively restrained, and the extraction accuracy and robustness are improved. The
system has the whole-process unattended
processing capacity from GOCI-II data automatic downloading, preprocessing,
algal bloom recognition,
thematic map making to report output, can generate a monitoring report within one hour after
satellite imaging, and supports intra-day multi-temporal
cyanobacterial bloom dynamic monitoring. The method has been successfully applied to lakes such as Taihu Lake, lakes, Chaohu Lake and Hongze Lake, is particularly suitable for monitoring and early warning
cyanobacterial bloom in large and medium lakes, and has wide application prospects in the fields of
water environment supervision,
water quality risk control, ecological assessment and the like.