历史时期三峡库区东段自然灾害述论

On the Natural Calamities in the Eastern Areas around the Three Gorges Reservoir in Historical Periods

从历史上看三峡库区自然灾害随历史进程发生频率不断增高;造成库区自然灾害的主要原因是自然气候本身的变化和人为干扰,尤其是明清以来人口压力和“山田”农业经济的扩张是库区自然生态环境恶化成灾主导因素。当代库区生态环境的治理应考虑历史因素的影响。

Historically speaking, the occurrence frequency of the natural calamities in the areas of the Three Gorges Reservoir is on the increase in the historical development. The natural calamities in this area mainly resulted from changes of the natural climate as such and human interference, particularly the population pressure and the expansion of“hilly paddy - field” agricultural economy are the dominant factors contributing to the deterioration of the physical eco - system around the areas in the Three Gorges Reservoir. Thus the influences of historical factors should be taken into account while the eco -system around the reservoir areas in contemporary era is harnessed.