The Study Of Risk Assessment Theory And Method Of Harmful Algal Blooms Hazard

Along with the rapid development of social economy, a large amount of sewage which contain nutrients such as nitrogen, phosphorus etc,disperses into the sea,Those make some estuaries and bays with poor in exchange capability have much more nutrients,and cause the eutrophication of water body,so harmfull algal blooms event sharp increase. Harmfull algal blooms hazard has become one of main marine calamities of offshore sea area. HABs repeatedly occurs at coastal area, and that not only bring " severe loss to fish production and the sea water cultivation industry, but also destroy the marine environment and jeopardize human health. People gradually realized the importance that guards against and reduces harmfull algal blooms hazard to the development of social economy, and urgently needs to carry on the hazard assessment of HABs hazard, the vulnerability assessment of hazard-bearing body, and the risk assessment, provides the scientific basis for the formulation active control and the management measure, achieved takes measures against natural disasters the disaster reduction goal. This article has made the beneficial discussion in this field.As the focal and the breakthrough point of this paper, this article has carried on the preliminary exploration to risk assessment theory and method system of harmful algal blooms hazard, has established the risk assessment theory system of harmful algal blooms hazard, laid the foundation for the risk assessment theory of harmful algal blooms hazard. Its main contents include several aspects as follow:Firstly, explicated the definition of risk assessment of HAB hazard, established the risk assessment is composed of the hazard assessment of HABs hazard and the vulnerability assessment of hazard-bearing body two aspects.Secondly, established the index system of risk assessment of HABs hazard. The index system of risk assessment is composed of the index system of hazard assessment of HABs hazard and vulnerability assessment of hazard-bearing body, and used Delphi...