This invention discloses a method for delineating deployment zones for the harvesting of *Ulva prolifera* (a type of
algae) green tides, relating to the field of *Ulva prolifera* green tide disaster prevention and control. The method includes the following steps: initially determining the harvesting area; acquiring
satellite remote sensing images of the harvesting area and interpreting them to obtain the distribution location and range of the *Ulva prolifera* green tide; setting up grid cells within the distribution range of the *Ulva prolifera* green tide; constructing an ecodynamic forecasting model for the *Ulva prolifera* green tide; acquiring future forecast data from sensitive targets of the *Ulva prolifera* green tide disaster to the sea area near the grid cells, and combining this with the ecodynamic forecasting model to obtain the drift position and
biomass of *Ulva prolifera* green tide particles at each future moment; constructing a deployment level model for the harvesting of *Ulva prolifera* green tides from three aspects: nearshore
threat,
biomass accumulation, and beaching trend; and delineating the deployment zones for the harvesting of *Ulva prolifera* green tides. This invention, by scientifically and accurately delineating deployment zones for the harvesting of *Ulva prolifera* green tides, can provide guidance for the priority order of *Ulva prolifera* green tide harvesting.