What are the possible reasons for the lack of rainfall in a certain place?

1. Far away from the ocean and deep inland. Far from the ocean, there is less precipitation, water resources are scarce and unevenly distributed, strong evaporation from the sun, high altitude and strong winds, arid climate, sparse vegetation, soil erosion, strong wind erosion and other natural conditions result in scarce precipitation.

2. The leeward slope of the mountain. The leeward slope refers to the side of the terrain that receives less rainfall. Because this side is right on the back where the warm and humid air flow is blocked by the terrain, it gets its name. Relatively speaking, the leeward slope has less vegetation, animal and plant resources, and therefore less precipitation.

3. It is located in a tropical area and is controlled by subtropical high pressure all year round. The eastern part of the subtropical high is an area of ??strong downdraft movement. The downdraft is warmed by adiabatic compression, and the controlled area will experience persistent sunny and hot weather, resulting in scarce precipitation.