Geographical environment of Xingtang county

Xingtang county belongs to Taihang shallow mountainous area, and the terrain in the territory gradually inclines from northwest to southeast, showing a stepped distribution, which is composed of three landforms: low mountains, hills and plains. The highest point is the top of Jiukouzi Township and Fuping County in the northwest, with an altitude of 960 meters. The lowest point is in Beigaoli village in the east, with an altitude of 75 meters and a relative height difference of 885 meters.

1, low mountain area

The northwest of Tuanshan-Huanglonggang-Qintai-Beichengzhai line is a low mountainous area with an area of 379 square kilometers, including all the villages in Shangyanzhuang Township and Jiukouzi Township and some villages in Koukou Town. There are 39 peaks in this area, with an altitude of 960 ~ 225 meters. The mountain range is nearly east-west, and gradually converges gently to the east in a ladder shape.

2. Hilly areas

The northwest of Beilonggang-Zhaoyangguan-Shangbei-Nanzhaiying line is a hilly area with an area of 224 square kilometers, including all villages in Beihe Township, Yuting, Shangbei, most of Zhai Ying, Chengzhai Township and some villages in Nanqiao Town. There are 6 peaks in the area with an altitude of 225 ~ 150m. The terrain is gentle, the soil layer is 20 ~ 50 cm, and the valley depth is 2 ~ 3 meters. The soil layer is thin, the texture is sticky and the water storage capacity is poor.

3. Plain areas

The Beilonggang-Zhaoyangguan-Shangbei-Nanzhaiying line is located in the southeast plain area, covering an area of 422 square kilometers, which is the alluvial fan loess plain in front of Taihang Mountain in Cenozoic Quaternary. 75 ~150m above sea level. The texture is moderate. Xingtang County belongs to the Daqinghe River system of Haihe River Basin. To the east of Shahe River and to the west of Cihe River, there are Gaohe River and Quhe River, and there are 6 rivers (ditches) with a basin of more than 30 square kilometers, such as Hejiang River, Huanglonggang River, Egong River, Kuergou, Longmenggou and Miaolinggou.

Gaohe, a tributary of Shahe River, is the largest river in China. Xipingfeng and Aoyushan, which originate in the northwest of the county, flow through the county to the southeast, bend eastward to the southeast of Beigaoli Village and join Shahe River, passing through nine villages, including Jiukouzi, Koukou, Fangshang, Chengzhai, Shangbei, Shitong, Xingtang, Zhili and Duyanggang, with 7 1 village. The total length is 69.4 kilometers, the riverbed is 50-350 meters wide and the drainage area is 484.9 square kilometers. There is a reservoir upstream. 27.6 kilometers below the reservoir, there are three big tributaries, with large river slopes, narrow river beds, bare rocks and fast-flowing water; 38.8 kilometers below the reservoir, there are four tributaries such as rivers flowing into it. The river bed is wide and there are many beaches. The ice age is from February 65438 to February of the following year. The flood season is very serious. In the 28th year of the Republic of China (1939), the flood flow was as high as 1865 cubic meters per second.

Shahe River: Paihe River in ancient times is a seasonal river, which originated at the foot of Gushan Mountain in the northeast of Fan Shi.

Quhe: Haizi River was once named. Originated from Lujiazhuang and Putashi in the northern Tang Dynasty.

Magnetic River: Formerly known as Magnetic Water, it is the boundary river of Xingtang, Lingshou and Zhengding counties. Xingtang county is located in the warm temperate zone and semi-humid monsoon climate zone. Spring, autumn and winter are mainly affected by cold air from Siberia and Mongolia, with sunny weather and plenty of sunshine; In summer, affected by the warm climate in the south, the air is humid and the precipitation is abundant. The average annual precipitation is 450.4 mm.

Spring (March-May) is hot and cold, and the average temperature rises by 0.32℃ every day. 1970- 1980 wind frequency accounts for 4 1.6% of the annual wind frequency, mostly northerly. Snow and snow are scarce, with an average precipitation (1954- 1983) of 50.4 mm, and the temperature rises sharply in summer (June-August), with an average of 24.6℃, 26.6℃ and 24.3℃ in June, July and August respectively (1983). The southeast wind is more. Precipitation accounts for 66-77% of the whole year.

The early summer is dry, with an average precipitation of only 8.8 mm. The main disasters are rainstorm, hail and dry-hot wind. 1970- 1983+04 has 89 rainstorms and 65 hailstorms, 12 dry-hot wind and severe drought in 6 years.

In autumn (September-165438+1October), the temperature changes rapidly, from 10℃ to 0℃, generally lasting 32-36 days, with a large temperature difference between day and night. The precipitation accounts for 13- 18% of the whole year, and the main disasters are low temperature, rain and frost. 1970- 1983, low temperature and continuous rain occurred for 35 times.

Winter (65438+February to February of the following year) is dry and cold, with little snow, and is often attacked by cold waves and strong winds from Siberia. From February 65438 to the following February, the average temperatures were -2.2℃, -4.8℃ and-1.7℃ respectively. The extreme minimum values are-19.7℃ (1970 65438+February 25th) and -20.7℃ (respectively.