Geographical phenomena and their causes in Henan Province

The geographical phenomena and reasons in Henan are as follows:

1. Geographical environment: Henan is located in the middle of China. Most areas are relatively flat, lacking natural barriers and natural water sources. The land types are mainly plains and hills. This geographical environment limits the distribution and utilization of hydrological resources, which makes agricultural production in this area face great difficulties.

2. Climatic conditions: Henan has a warm temperate monsoon climate, with hot and humid summer and cold and dry winter. Climate change will not only have a direct impact on crop growth and harvest, but also easily lead to disasters, such as extreme weather such as drought and flood, which will further aggravate the instability of crop production.

3. Land quality: The land quality in Henan is unbalanced, with poor fertility in most areas, serious soil erosion and intensified land degradation. This leads to low crop yield, deterioration of farmers' living conditions and vulnerability to famine.

4. Population pressure: Henan has a large population, limited land and great pressure on agricultural production. Due to population growth and the acceleration of urbanization, land needs to be used for industry, construction and urban development, which reduces the cultivated land area and agricultural production capacity.

The characteristics of Henan:

Henan has a complex terrain, high in the west and low in the east, and concave in the north and south. There are four mountain ranges in the north, west and south: Taihang Mountain, Funiu Mountain, Tongbai Mountain and Dabie Mountain, with subsidence basin in the middle and vast Huang-Huai-Hai alluvial plain in the middle and east. Hilly areas account for 44.3% and plain areas account for 55.7%. Henan is the core water source, main water receiving area and head of the main canal project of the middle route of South-to-North Water Transfer Project.