Group 1 - A significant rain belt along the Yangtze River has caused frequent rainfall in the Sichuan-Chongqing and Jiangsu-Anhui regions, with rainfall intensity varying greatly and localized heavy downpours observed [1] - Monitoring data indicates that from the 9th, areas in eastern Sichuan, Chongqing, and Hubei experienced rainfall between 50 to 100 millimeters, with localized areas in Chengdu and Deyang reaching 253 to 349 millimeters [1] - Meteorological experts predict that from the 11th to the 12th, the rain belt will persist, with parts of Sichuan, Chongqing, northern Guizhou, northern Yunnan, Hubei, northern Hunan, Anhui, and Jiangsu expected to experience heavy to extremely heavy rainfall [1] Group 2 - Different types of rainfall can trigger geological disasters, with short-duration heavy rainfall leading to rapid surface runoff that can cause mudslides and shallow landslides due to soil saturation [2] - Continuous rainfall allows water to seep into deeper soil layers, increasing the weight of the rock and soil, which can lead to deep landslides when the friction between layers is weakened [2] - The risk of landslides does not cease immediately after rainfall, as water continues to infiltrate the soil, potentially leading to landslides days after the rain has stopped [2]

新华社北京8月11日电 题：雨带继续维持 川渝至苏皖一带警惕强降雨致灾 中央气象台首席预报员董全分析，当前来自西南方的低空急流不够强，来自北方的冷空气也较弱， 但空气中的水分充沛，能量充足，就会形成面上不均匀、单点强的降水。"气温越高空气中能够容纳的 水汽越多，目前这种空气中水汽总量极大的情况为强降水提供了充分的前提。"董全说。 专家表示，无论是大范围强降水，还是分布不均匀、单点强度大的降水，都具有较强的致灾性，容 易引发次生灾害，但后者更加隐蔽、预报难度更大，相关地区切不可因为暂时没有降水或降水不强而放 松警惕。 事实上，不同类型的降水都可能引发地质灾害。 当短时强降水发生时，雨水来不及充分渗入深层土壤，大部分会在地表形成快速流动的水流。这些 水流冲刷地表的松散土石并将其裹挟，易形成泥石流。同时，表层土壤在短时间内因雨水饱和，就像被 泡软的蛋糕一样失去原有的稳定性，容易发生浅层滑坡。 而在持续性降水的作用下，雨水会慢慢渗入土壤深层，就像给山体"喝水"。水分顺着岩土体中的孔 隙或裂隙不断渗透，导致岩土体自重增加并发生泥化、软化现象，坡体强度和稳定性降低。当深层土壤 和岩层之间的摩擦力被水分削弱到一定程度时，就 ...