Application of Optimum Perturbation Algorithm for Parameter Inversion Identification of Soil Moisture Model under Ecological Slope Protection

摘要

Based on porous media fluid dynamics theory and parameter inversion identification technology, mathematical model of soil moisture movement for ecological slope protection was established, and corresponding numerical inversion model was proposed. Using optimum perturbation algorithm, parameter inverse problem of soil water properties was conducted on numerical solution and inversion identification under ecological slope protection. Calculation results show that numerical inversion has good consistency with experimental test. Optimum perturbation algorithm ensures validity of parameter inverse problem in unsaturated soil moisture, exhibiting certain stability towards data disturbance. It also solves sensitive question of initial parameters on calculation results, less dependent on prior information of solution. It provides theoretical basis and technical support for scheme determination of ecological slope protection as well as optimization of moisture characteristic parameter.