今年秋汛有什么特点？该如何防御

Group 1 - Recent heavy rainfall in the Huaxi region has led to significant water level increases in small rivers in Chongqing, with some reaching record highs for the year [1][5] - On October 13, the water level of the Mudixi River in Yunyang County peaked at 300.42 meters, marking the highest level since the onset of the flood season [1] - The local water resources department has implemented measures such as coordinated flood discharge from hydropower stations and increased monitoring to ensure public safety [1][3] Group 2 - The Ministry of Water Resources reported that the autumn flood season this year is characterized by frequent heavy rainfall, high cumulative rainfall, and many rivers exceeding warning levels [5][7] - Since late August, there have been nine significant rainfall events affecting the autumn flood area, with cumulative rainfall in the Haihe and Yellow River basins reaching record highs since 1961 [5][7] - A total of 130 rivers across several provinces have experienced floods exceeding warning levels, with notable occurrences in the Yellow River and its tributaries [7] Group 3 - The overall flood defense situation in the Yangtze and Yellow River basins is complex and severe, with predictions of additional rainfall events in the coming week [7][9] - The Ministry of Water Resources has deployed strategies for flood defense, including precise scheduling of reservoirs to mitigate flood pressure in the middle and lower reaches of the Yellow River [9] - Efforts are being made to ensure that key reservoirs, such as the Danjiangkou and those in the Yangtze River basin, reach full storage capacity to manage potential flooding [9]