The swrrbwq model simulates hydrology, sediment, nutrient and pesticide transport in a large and complex rural watershed. The accuracy of the watershed management model in terms of rainfall, sediment use, and soil management can be reasonably explained in terms of the accuracy of the operation of the watershed model in terms of rainfall, soil use and so on.

Distributed hydrological model, water and energy prediction, geotop can be applied to very complex terrain, and integrates all surface energy balance conditions except water balance. For saturated and unsaturated subsurface flow, 3D Richard equation is adopted to realize accurate input of radiation parameters to obtain surface temperature.

At present, the plastic tarpaulin used in soil fumigation process has been proved to be able to penetrate into the fumigation steam and cause obvious loss to the atmosphere. New low permeability membranes are being developed to reduce fumigant emissions and improve efficacy. A fast, reliable and sensitive method is needed to measure the permeability of various membranes that may be used in new management practices. Filmpc provides a method for estimating the mass transfer coefficient (H) of fumigants in agricultural films. H is a measure of diffusion resistance. Unlike other permeability measurement methods, h is an attribute of film chemical combination, independent of the concentration gradient of the whole film. The model relies on a mass balance method, and adsorption and diffusion are carried out on the membrane. The results show that this method produces a sensitive and reproducible method for measuring membrane permeability.

The partmc model is developed to simulate the evolution of aerosol particles in the atmosphere. Atmospheric aerosol particles are usually composed of complex mixtures of different chemical species, ranging in size from a few nanometers to tens of microns. Partmc model is very suitable for particle analysis because it can solve the whole synthesis space explicitly without any prior assumption of particle composition. Since the composition of each particle determines the optical properties of aerosols and the ability to form cloud droplets, these details are very important for determining the impact of aerosols on climate.

One dimensional River Stuart model

Multi flow confluence algorithm model