(2)
discharge
sediment concentration
ice period
flood season
A
large
small
no
long
B
small
large
yes. ? Rich in tourism resources; National policy support; Domestic and foreign funds and manpower support. Disadvantages: rugged ground and vast mountainous area; Ecological fragility; Serious damage to infrastructure such as transportation; The market in the region is small.
at 14: 28 on may 12, 28, a strong earthquake with a magnitude of 8. occurred in Sichuan province. Sichuan is located in the southwest of China, with active crust, complex geological structure and developed mountain faults, and there is a lot of precipitation in the subtropical monsoon climate. Earthquakes are often accompanied by landslides and mudslides, which block traffic lines and increase the difficulty of rescue. After the Wenchuan earthquake disaster, the country quickly set up a rescue leading group and invested a lot of manpower and material resources in earthquake relief and resumed production. The favorable location conditions for resuming production are rich in resources. On the negative side, the geological structure is complex and the mountainous area is vast; The population increases rapidly, the ecological pressure increases, and the ecological environment is fragile; The infrastructure of this earthquake was seriously damaged. Hydrological characteristics are mainly analyzed from discharge, water level, sediment concentration and ice period. Jiatu is the Sichuan Basin, and the rivers in the basin have a large amount of water and a small sediment concentration. Because there is no ice period in the subtropical zone, the flood season is long. Figure B is the northern part of Hebei and the Beijing-Tianjin area in North China. Most of its rivers flow through the plateau area with high sediment concentration, short influence time of summer monsoon, short flood season and small water volume, including ice period.