How many tourists were forced to stay in Hongya, Sichuan, because the road was interrupted by heavy rain?

From the evening of August 7th to the early morning of August 8th, Meishan, Sichuan Province suffered from heavy rainfall, mainly concentrated in Hongya County, with the rainfall reaching 23 1. 1 mm. The heavy rainfall also led to mudslides in Wawushan Town, Hongya County, and the roads were interrupted. The first line from Yannv Lake in Wawushan Town to Wawushan Scenic Area is a famous summer resort. At present, it is summer, and about 7000 tourists are forced to stay. At present, the local government is fully organizing the emergency repair work.

At present, it is the rainy season, which is a period of high debris flow. Passengers are reminded not to go to those areas with high debris flow for their own safety.

Debris flow refers to a special torrent containing a lot of sediment and stones caused by heavy rain, blizzard or other natural disasters in mountainous areas or other areas with deep valleys and steep terrain. Debris flow has the characteristics of strong suddenness, fast velocity, large flow, large material capacity and strong destructive power. Debris flow often destroys roads, railways and other transportation facilities and even villages and towns, causing huge losses.

Debris flow is a torrent formed by saturated dilution of soft soil mountain containing sand and gravel by rainstorm and flood, and its area, volume and flow are large, while landslide is a small area of diluted earth mountain. Typical debris flow is composed of viscous mud suspended with coarse solid debris, which is rich in silt and clay. Under the appropriate terrain conditions, a large number of water bodies soak in the solid accumulation materials in the flowing hillside or ditch bed, which reduces its stability, and the solid accumulation materials filled with water move under their own gravity, forming mudslides. Debris flow is a disastrous geological phenomenon. Usually, the debris flow erupts suddenly and violently, which can carry huge stones. Because of its high speed, high energy and strong destructive power.

The whole process of debris flow is generally only a few hours, only a few minutes short, and it is a natural disaster widely distributed in some special landform areas in the world. This is a mixed flow of soil, water and gas between sediment-laden flow and landslide, which is excited by heavy rain, melting of snow and ice and contains a lot of sediment and stones. Debris flows are mostly accompanied by floods in mountainous areas. It is different from the general flood in that the flood contains enough solid debris such as sediment and stones, the volume content of which is at least 15% and at most about 80%, so it is more destructive than the flood.