What does it mean to control small and medium-sized rivers and flash floods?

The management of small and medium-sized rivers mainly aims at preventing drought and waterlogging and protecting the ecological environment, and focuses on the work of "three clean-ups and one protection". Mountain torrent disaster management refers to the management of floods caused by rainfall, mudslides and landslides caused by mountain torrents in hilly areas, which cause losses to the national economy and people's lives and property.

The management of small and medium-sized rivers mainly aims at preventing drought and waterlogging and protecting the ecological environment, and focuses on the work of "three clean-ups and one protection". Mountain torrents refer to floods caused by rainfall in hilly areas, mudslides and landslides caused by mountain torrents, which cause losses to the national economy and people's lives and property. In recent years, affected by many factors such as special natural geographical environment, extremely disastrous weather and economic and social activities, floods, mudslides and landslides have occurred frequently in hilly areas of China, causing casualties, property losses, infrastructure damage and serious ecological environment damage. Mountain torrents are the main types of natural disasters that cause casualties in China, and have become the focus and difficulty of flood control and disaster reduction in China.