A lake
cyanobacterial bloom pixel level prediction method based on multi-
source data fusion belongs to the technical field of
algae prediction, and comprises the following steps: collecting lake pixel level multi-source basic data in a
satellite image and carrying out preprocessing, calculating an
algae index to generate a binary distribution product, carrying out space-time matching according to a
zoning factor suitability parameter table, and carrying out prediction according to the
zoning factor suitability parameter table. Inverting a blue-
green algae proliferation rate and adjusting a factor weight; calculating a pixel comprehensive suitability degree; identifying a
hysteresis effect factor through
correlation analysis and causal test; screening a high
impact factor through feature sorting, constructing a
diffusion rule, extracting an initial water bloom pixel and determining a
diffusion starting point; and constructing a neighborhood iterative
diffusion model by using the space-time dynamic pixel-level suitability matrix, and iteratively simulating and outputting a pixel-level water bloom prediction map. According to the method, through multi-source pixel-
level data standardization processing and partition threshold modeling, the
coupling diffusion model is optimized in combination with the multi-
source data, accurate water bloom prediction is achieved, and the space-time precision and practicability of pixel-level prediction are improved.