Method for determining suitable water surface rate based on water environment target

The invention discloses a suitable water surface rate determination method based on a water environment target, and the method comprises the steps: obtaining land use data, and generating land use information according to the land use data; on the basis of the land use information, determining the maximum pollutant gathering quantity C1; acquiring an accumulation rate constant C2, a washing coefficient S1, a washing index S2, a water quality target concentration value Cs of the corresponding land, a comprehensive degradation coefficient K of the pollutants, a water depth h and a side inflow q of the pollutants; on the basis of an Infowworks ICM model, according to the maximum pollutant gathering amount C1, the pollutant accumulation rate constant C2, the scouring coefficient S1 and the scouring index S2, determining the pollutant river entering rate m; and on the basis of a water surface rate calculation model, according to the pollutant river entering rate m, the water quality target concentration value Cs,