自从地球上有了人类的发展,便有危及人们生存和安全的各种灾害。随着人类社会的发展,自然界也在不断变化:太阳对地球辐射能的变化,地球运动状态的改变,地球各圈层物质的运动和变异,还有人类和生物的活动因素,都能时常破坏人类生存的和谐条件,导致自然灾害的频繁发生。气象、海洋、洪涝、地质、地震、生物等自然灾害,都不是孤立存在的,而是一个相互联系的整体系统,称为自然灾害系统。自然灾害的起因很多,其致灾 Since human development on the earth, there have been various disasters that endanger people’s survival and security. With the development of human society, nature is constantly changing: solar radiation on the Earth changes, changes in the state of the Earth’s movement, the earth’s movement and variation of the various layers of material, as well as human and biological activity factors, can often damage The harmonious conditions of human existence lead to the frequent occurrence of natural disasters. Natural disasters such as meteorology, oceans, floods, geology, earthquakes, and biology do not exist in isolation but as an interconnected and holistic system called a natural disaster system. Natural disasters have many causes, causing disaster