Method for determining water flow resistance of ecological vegetation entering sea estuary

A method for determining the water flow resistance of ecological vegetation entering a sea estuary comprises the following steps that S1, based on a resistance equation and in combination with a conservation type deformation differential momentum equation, a resistance coefficient corresponding to the real-time water flow condition is reversely calculated; and S2, the corresponding water flow resistance is determined according to the resistance coefficient. According to the method for determining the water flow resistance of the ecological vegetation at the estuary of the sea, through simultaneous establishment of a resistance equation and a conservation type deformation differential momentum equation and in combination with actual measurement, resistance coefficients of different water flow conditions are reversely calculated, and the resistance value is determined according to the resistance coefficients; therefore, the resistance value based on the resistance value can better fit and characterize the water