The Impact Factor Analysis of Dust Storm Disaster in Northern China

Based on data(1951-2000) from the 188 meteorological observation stations and the NDVI data(1983-2000) from EROS data center from 1983 to 2000,the authers analyzed the impact factors of dust storm in northern China,and arrived at the main conclusions as follows:(1) Among the natural factors which affect the occurrence,development and evolution of dust storm,vegetation coverage,precipitation,windy days and temperature play a critical role.The summer vegetation coverage affects the occurrence frequency of the following spring season.Precipitation and temperature have direct impact on the dust storm related ground parameters such as vegetation coverage.(2) Windy days and temperature are composed of the impetus factors of dust storm,and vegetation coverage and precipitation are the main resistance factors.The changes of the dust storm days and duration mainly depend on the integrated affection of the impetus factors and the resistance factors.(3) The fundamental measures to reduce dust storm disaster is not to deal with dust storm itself,but to eliminate the social impact which caused land and ecological degradation and to achieve the harmony development among social,economic and eco-environmental construction.