Does Huaibei Plain belong to the flat water belt?

The agricultural area in Huaibei Plain has a total land area of 37,400 square kilometers, an agricultural population of15.263 million, and a cultivated land area of 32.065 million mu, accounting for 47.8% of the province's cultivated land area, with a per capita cultivated land of 2 1 mu. It is the largest and most populous agricultural area in Anhui Province. The solar radiation in Huaibei Plain in June is 590-650 MJ/㎡, accounting for 1/9 of the total solar radiation in the whole year, ranking first in each month. At this time, the crops in the afternoon have been harvested, and the crops in the autumn are just in the stage of sowing and emergence, so the leaf area coefficient is small and the photosynthetic utilization rate of solar energy is very low. Especially in June, meteorological disasters are frequent, such as drought, waterlogging and continuous rain in early summer, with a probability of 62.5%, which prolongs the crop replacement period and wastes more light energy resources. In June+10, 5438, the solar radiation also reached 4 10-430 MJ/㎡, which was the crop replacement period in summer and autumn and the frequent meteorological disasters, and there was also the problem of wasting light energy resources. Huaibei plain is located in the mid-latitude position, forming a transitional feature of climate. Frequent activities of cold and warm air masses and changeable weather have affected the interannual variation and seasonal distribution of precipitation, and often brought floods and droughts to Huaibei Plain. Severe weather such as rainstorm, low temperature and continuous rain, hail, frost and dry-hot wind has adversely affected agricultural production in this province. Coupled with excessive logging and reclamation, it has caused serious soil erosion. Serious soil erosion leads to land degradation, reduced productivity and even bare bedrock. At the same time, soil erosion increases the siltation of rivers, lakes and reservoirs, and intensifies the frequent occurrence of floods and droughts.