Bengbu special

Topographic features: Bengbu City is located in the transition zone between the Huang-Huai-Hai Plain and the Jianghuai hilly area, at the end of the Jianghuai watershed. The territory is dominated by plains, with scattered hills in the south. The northwest of the ground tends to the southeast, and the natural slope drops to about one in ten thousand. Most of the urban areas are located on the south bank of Huaihe River. Apart from Bangshan (Xiaonanshan), which is isolated in the city center, there are more than 20 mountains in the east, south and west of the urban areas. In the urban area of 445.4 square kilometers, hills and mountains account for 50 square kilometers, and water surface accounts for 15.3 square kilometers. Landforms are mainly divided into three types: plains, hills and terraces. The plains in China are dominated by the flood plains of the Yellow River, and there are also shallow lowlands between rivers, low terraces with hills in rivers and flood plains beside rivers. The platform is mainly distributed in the wavy area south of the river, and is composed of loess of Qizui Formation, which is divided into two types: Pinggang and Xiegang. Bengbu hills are mainly distributed in the suburbs south of Huaihe River, which is the northern edge of Jianghuai hills. Most of the bedrock in the hills is exposed by weathering and denudation, with occasional residual slope deposits, which are basically undeveloped and have thick bones. According to the ground height, it can be divided into high hills and low hills.

Climate characteristics: Bengbu belongs to the transitional zone between the humid monsoon climate in the north subtropical zone and the semi-humid monsoon climate zone in the south temperate zone, and has the characteristics of two climatic zones. The monsoon is remarkable, the four seasons are distinct, the climate is mild, the rainfall is moderate, the sunshine is sufficient, and the frost-free period is long. However, because it is located in the mid-latitude, cold and warm air masses frequently meet, change greatly and the precipitation is concentrated, so droughts and floods often occur, which has a certain impact on agricultural production. Bengbu city is abundant in sunshine and radiant heat, which can meet the needs of double cropping of crops a year. The sunshine hours in the whole year are 4,429.2 hours calculated by the Observatory, and can reach 4,440.6438+0 hours in leap years.

Characteristics of natural resources: The surface water in Bengbu is mainly Huaihe River, with other small water systems in the north, Tianhe River in the southwest, Baligou in the west and Zi Long and Baojiagou in the east. Small water systems, except the North Feihe River, are all combined with rivers and lakes, with short rivers and small water, which are often cut off in dry years. The groundwater in Bengbu basically belongs to the pervaporation type, and the lateral recharge generated by the surrounding terrain is very small, and the static reserve of groundwater is about 320 million cubic meters. The south bank of Huaihe River belongs to poor water area, and the north bank belongs to rich water area. Groundwater occurrence types can be divided into Quaternary Holocene pore water and bedrock fissure water.