ENVIRONMENTAL RISK ASSESSMENT METHOD USING SPATIAL POINT SOURCE ACCUMULATION TECHNIQUE
In this study, we discuss a risk assessment method for spatial point source accumulation that is suitable for regional comprehensive
prevention and control of environmental risks. The distribution types of spatial risk sources and other related data are collected and
analyzed by adopting Fengtai District, Beijing as an example. On the basis of the spatial analysis algorithm, the environmental risk
of region is comprehensively assessed from the perspective of risk-inducing factors, risk substances, and environmental sensitivity.
The characterization methods of five types of environmental risk sources, namely, chemical substances, air pollutants, water
pollutants, hazardous wastes, and accumulation, are proposed. The point-to-surface continuity of spatial expression is realized
using spatial analysis technology of geographic information system. A model of environmental sensitivity of receptors is
constructed considering social complexity and sensitivity. The relative comprehensive expression of risk value in space is realized
using an overlay of layers and through spatial analysis algorithm. The comprehensive cumulative risk degree and type of spatial
environment in assessment areas are obtained, and the risk control zoning is conducted accordingly. Eight levels of risk control
zones are proposed as a basis of the follow-up of management departments to conduct risk control. In addition, the way identifies
high risk areas, where monitoring and detailed analysis is required. This study provides a reference for similar research and
evaluation work.