西安市自然灾害的成因与防治研究

A Study on the Cause and Control of the Natural Disasters in Xi'an Region

This paper, particularly based on the field investigation, maps the landslides and mud-rock flowes in the loess and mountain regions of Xi'an with the scale of 1:10000, and divides the whole region into three subregions, dangerous, slippery and safe subregion in order to provide more basic materials for disaster control. The auther, based on the researches of the landslides of the Cuihua Mountain and the mud-rock flowes of Lantian County in 1988, argues that there arc many kinds of disasters, mainly including earthquick, landslide, mud-rock flow, drought, waterlogging and serious harmfulness. Each kind of disasters has its own regional distribution pattern and a close relationship with the others. The cause of disasters is mainly the results of the internal and external force effects. The disasters in this region, usually, take place abruptly and create accidents with casualties and serious economic losses easily. In addition, the conditions, harmfulness, occuring region, excitation mechanism, and control measures including moniter-ing, forecasting and soon, are also researched.