The geographical environment of Taocheng District

Taocheng District belongs to the continental monsoon climate zone, which is warm and semi-arid. The climate is characterized by four distinct seasons, with large differences between cold, warm, dry and wet. Affected by the southerly airflow at the edge of the Pacific Subtropical High in summer, the climate is muggy and hot, with concentrated precipitation. In winter, affected by the northwest monsoon, the climate is dry and cold with scarce rain and snow. Spring is dry and windy with little rain and the temperature rises quickly. Autumn is characterized by crisp and clear weather, and sometimes continuous rainy weather. occur.

The average annual sunshine hours in Taocheng District is 2642.8 hours. The annual evaporation ranges from 1295.7 to 2621.4 mm. The average annual precipitation is 496.4 mm. The southerly wind prevails throughout the year, with an average wind speed of 3.0 meters/second. The average annual temperature is 12.7℃. The annual average ground temperature is 15.1°C, and the interannual variation is generally between 13.7°C and 16.7°C. The average number of snowfall days per year is 8.1. The terrain in Taocheng District is relatively flat, with a slight slope from southwest to northeast. The elevation is about 22.4 to 26.4 meters, with a height difference of about 4 meters. The ground slope is generally between 1/8,000 and 1/10,000. The terrain is affected by the frequent diversion of ancient rivers, flooding, erosion and sedimentation in history.

There are shallow closed depressions in Taocheng District. The deepest points of these shallow flat depressions are about 3 meters below the general ground (Qianqing depression), and some are only about 1 meter below the ground (Hujiawa, Hutang depression). There are many highlands, the low ones are about 1 meter above the ground, and the high ones are 3 to 4 meters above the ground. The area ranges from a few acres, a dozen acres to dozens of acres. Ditches and natural drainage ditches are scattered throughout the territory.