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The geological natural disasters are very complex.The endogenic pro- tess and exogenic process have been strong in both geological history and at present.The population density of Beijing-Tianjin-Tangshan area is an enormous number.There are the crowded cities and towns in this area and the rapid development of industry and agriculture and the activity of the humanity is exerting a great strong influence upon reformation and destru- ction of geological natural conditions.The burden of environment is getting heavier in Beijing,Tianjin,Tangshan,Qinhuangdao and Langfang.Under this condition the various geological natural disasters have continuously hap- pened and endangered people’s lives,properties and securities,and have blocked economic development of the society.
The geological natural disasters are very complex. The endogenic pro- tess and exogenic process have been strong in both geological history and at present. The population density of Beijing-Tianjin-Tangshan area is an enormous number. There are the crowded cities and towns in this area and the rapid development of industry and agriculture and the activity of the humanity is exerting a great strong influence upon reformation and destruction of geological natural conditions.The burden of environment is getting heavier in Beijing, Tianjin, Tangshan, Qinhuangdao and Langfang .Under this condition the various geological natural disasters have continuously hap-pened and endangered people’s lives, properties and securities, and have blocked economic development of the society.