Modelling of Grey Differential Model of River Water Pollution and its Application
Changjun Zhu and Wenlong Hao
Journal Title:Nature Environment and Pollution Technology
Based on the grey theory, grey characters of river environment system were analyzed. The velocity and dispersion coefficient and attenuation in river were considered as uncertainty parameters and expressed as grey parameters. A grey differential equation of contaminant diffusion in river was built. And the equation has special structure. The truncation error of finite differential method in solving the model was corrected. According to the model, distribution values of pollutant concentration under sudden pollutant discharge can be obtained directly, which can provide abundant and useful water quality information for the plan and control of water pollution. It is shown that the calculated results obtained from the grey model are reliable and reasonable.