1. Natural factors: Jingjiang reach is located in the subtropical monsoon climate zone, with strong precipitation and long duration in summer, which is easy to cause floods. In addition, the shape of Jingjiang river system, the characteristics and topography of the river channel will also affect the occurrence of floods.

2. Human factors: human activities such as vegetation destruction, soil erosion and water conservancy projects will also have an impact on river diversion and flood disasters. For example, the destruction of vegetation in the upper reaches may lead to soil erosion, thus affecting the velocity and direction of rivers.

In order to prevent floods and reduce the impact of river diversion, biological measures and engineering measures can be taken. For example, planting trees and grass in the basin to maintain water and soil, building reservoirs and river regulation and other engineering measures.