一般来说,泥石流的产生有三个条件:一是要有适当的沟谷地形;二是要有大量的松散固体物质;三是要有强暴雨或长时间暴雨。因此,按照一般规律,泥石流的高发季节应当是在夏秋季。但为何此次菲律宾会在春季发生如此剧烈的泥石流灾害呢?受灾的直接原因,便是当地的降雨量激增。今年的1月及2月,其降雨量竟是正常年份的300倍。导致此种情况出现的 In general, there are three conditions for the occurrence of debris flow: First, there must be appropriate valley topography; Second, there must be a large number of loose solid material; Third, there must be heavy rain or prolonged heavy rain. Therefore, in accordance with the general law, the high season of debris flow should be in summer and autumn. But why the Philippines will experience such a violent mud-rock disaster in the spring? The direct cause of the disaster is the surge in rainfall on the ground. In January and February this year, the rainfall was 300 times that of normal years. Cause this kind of situation appears