Optimized algorithm for estimating parameters by solving Van Genuchten equation based on stochastic particle swarm optimization

Using stochastic particle swarm optimization, soil water characteristics curves were fitted and Van Genuchten equation parameters were solved. Comparing with other optimized algorithms through instance, it has many merits such as rapid calculation speed, simple programming, initial value non-sensitivity, general astringency and high precision, which can be used as a new method to calculate Van Genuchten equation parameters.