The Geographical Environment of Suixi County

Suixi is located in the middle of Huaibei Plain, with a slight slope from northwest to southeast. Except for a few low hills in the northeast of the county, the rest are vast plains. The main landform types are hills, plains, lakes and rivers. Laolongji, the highest peak in the county, is located 5.5 kilometers southeast of Jicaili, with geographical coordinates of 33 56 ′ north latitude and116 54 ′ east longitude. It is 362.9 meters above sea level and 3 Li at the bottom of the mountain.

The plain area is flat and endless, with an altitude of 23.5 to 32.4 meters. It covers an area of about 2,070 square kilometers (excluding water surface and lake depression area), accounting for 85.2% of the county's total area. It is bounded by the ancient Sui Dyke (now Su Yong Highway) that crosses the middle of the plain, with the yellow flood plain in the north and the ancient river and lake sedimentary plain in the south.

There are many lake-closed depressions in southern Suiyuan, mainly distributed in Sipu, Zhude, Tiefo and other areas, all of which are cultivated land. This is a unique landform type in Suixi County, and its cause is related to Suixi Canal. The north dike of the canal is 40 meters wide and 5 meters above the ground, which is tall and complete; The south dike is 20 meters wide and 4 meters above the ground, which is incomplete. When the flood surges in flood season, the south dike often breaks, and the sediment is washed to both sides of the break by water, forming a mound from north to south. Tuling is a yellow floodplain material accumulation, with a width of 500 to 600 meters and a length of 3500 to 5000 meters, which is about 1 meter higher than the ground. The area of Shangmiao Zi Ling, Xiejialingzi, Fengxuzi Zi Ling and San Pu Nanlingzi in Sifu District alone exceeds 20 square kilometers. Between every two ridges, due to long-term water accumulation, a closed lake depression is formed, which is approximately square. There are many such lakes and depressions, commonly known as "Eighteen Lakes", such as Wolong Lake, Liuye Lake, Guanjia Lake, Yinhe Lake, Youzha Lake, Lianzi Lake, Chenda Lake, Liangyun Lake, Qiuhu Lake, Yangjia Lake, Siping Lake, Gushan Lake, Yanming Lake, Fuzi Lake, Baili Lake, Shenjiang Lake, Nanhu Lake and Small Lake. The total area is 86.67 square kilometers. It is characterized by large water accumulation at the bottom of the lake and poor water retention around it. Suixi has an annual average temperature of 14.5℃, rainfall of 852.4mm, abundant sunshine and distinct four seasons, and belongs to a warm temperate and semi-humid climate.

The county is a warm temperate and semi-warm monsoon climate zone with four distinct seasons. Spring (March-May) is warm, with the seasonal average temperature of 14.4℃ and the temperature rising rapidly. The weather is changeable, the rainfall is more than that in winter, and the east wind often blows. It is very hot in summer (June to August). Affected by the maritime climate, precipitation is concentrated, evaporation is large, and there are many southerly winds. Autumn (September to165438+1October) is cool, the temperature drops rapidly, and the daily temperature difference is large, mostly to the north. In winter (65438+February to February of the following year), affected by the cold air in Siberia, the weather is very cold, with few rain and snow and many northerly winds. The annual average temperature is 65438 04.5℃. 65438+ 10 is the year-round Leng Yue with an average temperature of-0.1℃; July is the hottest month in a year, with an average temperature of 27.5 degrees Celsius. The annual temperature is 27.6℃. The extreme maximum temperature is 4 1. 1℃. Appeared in June1972+01; The extreme minimum temperature was -2 1.3℃, which appeared on February 5, 1969. The difference between the highest temperature and the lowest temperature is 62.4℃. Generally, the temperature is the lowest before sunrise and the highest after noon 14. The diurnal variation is larger in spring and autumn, and smaller in winter and summer. The average daily range in April and May is 1 1.5℃ and 1 1.9℃ respectively. The daily average amplitude is 10℃ and 1 1.0℃ and 10.4℃ respectively. The temperature rose rapidly from March to May, rising by 65438 02.5℃. From September to165438+1October, the temperature dropped significantly 12.8℃.