黄土高原地区自然灾害时空分异综合研究

INTEGRATED RESEARCH ON TEMPORAL AND SPATIAL DIFFERENTIATION OF NATURAL DISASTERS IN LOESS PLATEAU AREA

根据作者建立的中国自然灾害数据库，在对黄土高原地区１９４９～１９９０年自然灾害总体特征分析的基础上，着重对１９４９～１９６５年与１９７８～１９９０年２个时段的自然灾害进行了对比分析。研究表明。本区自然灾害不仅在空间上有明显区域差异，而且在时间上有突出的动态变化，并显示出总体灾情加重的趋势；灾害组合变化也具有明显的区域性，反映了孕灾环境与承灾体对自然致灾因子及灾情的影响。

According to the databases of natural disasters in China and on the basis of the analysis on the 1949～1990 natural disasters integrated characteristic of the Loess Plateau area,the writers analysed the natural disasters in two different periods:1949～1965 and 1978～1990 of the area.It was concluded that this area had not only the regional differentiation on the spaee,but also have dynamics changes on the time and had the tendency of increasing disasters effects,the changes of composite natural disasters has the spatial differentiation.It deeply reflects the actions of hazard-formative environment and hazard-affected body to hazard formative factors and disasters effects.