【摘要】 地质灾害的发生与降雨历时、降雨量及降雨雨型有密切的关系,不同雨型的降雨诱发地质灾害的诱发机制具有明显的差异性。本文通过收集的降雨实况与地质灾害反馈资料,将诱发地质灾害的降雨雨型分为3种类型:台风降雨、持续强降雨和局地暴雨。研究表明,台风降雨型降雨诱发地质灾害具有"即雨即滑"的特点,即地质灾害的发生与降雨在时间上具有较好的对应关系;地质灾害发生空间位置与台风运移轨迹也基本一致。多为群发型地质灾害,灾害规模较小,一般为表层或浅层滑坡、崩塌。持续强降雨型降雨诱发地质灾害,在强降雨过程中地质灾害具有同步发生的特点;在降雨强度不大但连续降雨过程中,地质灾害具有一定的滞后效应;在地质灾害大规模发生后,诱发新的地质灾害雨量阈值提高。局地暴雨型降雨诱发的地质灾害往往集中发生在出现局地暴雨的当日当地。更多还原

【Abstract】 Geo-hazards have some correlations with rain-time,rainfall and rain-type.For different rain-types,rainfall induced geo-hazards have different characteristics.In this paper,according to rainfall and geo-hazards data,the rainfalls that can induce geo-hazards are classified into three types.They are typhoon rainfall,sustained rainfall and regional rainstorm.The characteristics of geo-hazards induced by different rainfall-types are different.Typhoon rainfall induced geo-hazards have the characteristics of "hazards and rainfall consistently".It is consistent in time and space.The hazards are almost clustery accruing,shallow sliding or rock-fall.For sustained rainfall,geo-hazards have the hysteresis action with small rain-intensity.But for inducing new hazards,it needs larger rainfall after hazards occurred.Geo-hazards induced by regional rainstorm often occur in the day and space as same as the rainfall.更多还原