全国山洪灾害时空分布特点研究

山洪灾害的发生具有明显的区域性、突发性、群发性、破坏性强和恢复难度大等特点,其空间分布与暴雨、地形地质的空间分布密切相关。溪河洪水灾害的发生次数具有一定的年际变化规律,降雨量多的年份就是溪河洪水灾害多发年。泥石流、滑坡灾害分布与降雨时间分布具有同期性,在空间和时间上的变化具有与溪河洪水相同的重现性。

Characteristics of temporal and spatial distribution of mountain flood in China

The happening of mountain flood disasters has obvious features of regionality, emergency, group incident, extensive damages and difficult recovery. Its spatial distribution has close relationship with the spatial distribution of rainstorm, landscape and geology. The occurrence of flood disasters in Xi River has certain rules in annual changes, i.e. the year with more precipitation is the year with more flood disasters. The distribution of mud-flow and landslide is timed simultaneously with the distribution of precipitation, and its temporal and spatial change is associated with the recurrence of flood in the Xi River Basin.