Public Opinion Spread And Government Emergency Management After The Outbreak Of Sea Sand Abuse

In July 2018,eight ministries,including the Ministry of Housing and Construction,jointly issued the “Notice on Special Actions for the Treatment of Illegal Sea Sand”,which pointed out that a large number of illegal sea sand flooded into the construction market in some areas and seriously threatened the quality of construction engineering.The use of illegal sea sand has occurred since the last century,and some problems have become increasingly prominent.Therefore,based on the above facts,this paper studies the public opinion spread after the outbreak of sea sand abuse and the resulting diffusion of public panic,in order to provide the government with relevant management suggestions.Firstly,on the basis of SIRS public opinion spread model,the subsystems such as events,media,government and enterprise were added,and the comprehensive weighting method was used to determine the factor weight,so as to establish the public opinion spread model based on system dynamics after the outbreak of the problem of sea sand abuse.In this model,the government negative force was specifically added to indicate the serious consequences of the accumulation of sea sand abuse not being handled in a timely manner.Secondly,taking the sea sand abuse incidents in shenzhen in 2013 and the sea sand abuse incidents in fujian in 2018 as examples,the differences in the process of public opinion spread under different situations are analyzed.On the basis of sensitivity analysis of the forces of each subsystem,the simulation analysis and comparison of the government’s four measures are carried out.Results show that the government should mainly deal with the public opinion dissemination of the sea sand abuse incidents from the perspectives of prevention and punishment to enhance incident handling capabilities,promulgation of relevant norms and policies to impose mandatory regulations on the use of sea sand,positive survey sea sand abuse to enhance information transparency,to speed up for incident response.Then,this paper extracts the source of public information--government,enterprises,media and friends agent,determines the behavior characteristics and interaction rules of each agent,and establishes the public panic diffusion model based on the multi-agent model.Communication among the public is based on the small-world network;The strategies of government and enterprises in releasing information are divided into false positive information,true negative information and true positive information.Finally,the sea sand abuse incidents in shenzhen in 2013 and the sea sand abuse incidents in fujian in 2018 are taken as examples to compare the public panic spreading process of the two events.Sensitivity analysis of some global variables found that the higher the small world network degree,the higher the broken key reconnection rate,the lower the degree of panic.The shorter of days’ number of automatic recovery,the sooner the panic level reaches its minimum.In addition,five kinds of information release strategies of the government are simulated and analyzed.The results show that different strategies have certain influence on the diffusion process of public panic.The government should manage the spread of public panic by prohibiting the release of false positive information,delaying the release of true negative information,timely release of emergency measures,and not keeping silent.To sum up,this paper studies the spread of public opinion,the diffusion of panic and the government’s emergency management after the outbreak of the abuse of sea sand.