Introduce my hometown and Changjiawa Village, Jia County, Yulin City.

Jin, Yuan, Ming and Qing Dynasties were called Jiazhou, and it was changed to Jiaxian in the Republic of China. 1964 was renamed Jiaxian in September. Located in the west bank of the middle reaches of the Yellow River in the northeast of Shaanxi Province, southeast of Yulin City and southeast of Mu Us Sandy Land. It faces Linxian County across the Yellow River in the east, Mizhi County in the west, wubu county mountains and rivers in the south, Shenmu County in the north, Suide County in the southwest and Yuyang District in the northwest. It has jurisdiction over 20 townships, covering an area of 2 144 square kilometers and 43,000 hectares of cultivated land. Mung beans are exported to Japan and other countries. Jiayu, Jiami and Wujia trunk highways are connected with the county branch highways and the newly-built Taijia and Yu Jia expressways. There are famous landscapes such as Baiyun Mountain Temple, Luxiang Temple and Yunyan Temple in the territory.

location

Jiaxian county is located in the northeast of Shaanxi province, on the west bank of the middle reaches of the Yellow River. East across the Yellow River and Shanxi Linxian; It borders Yindou Township and Shajiadian Township in Mizhi County in the west; In the south, it is connected with the mountains and rivers of Chashan Township, Zhangjiashan Township and Jizhen Town of Suide County in wubu county; It is adjacent to Huashiya Township in Shenmu County, Anya Township in Yuyang District, Liuqianhe Township and Qingquan Township in the north. It is located between 37 41'47 "~ 38 23' 34" north latitude and1/kloc-0' 45 "~10 45'10" east longitude, with a north-south length of 80. The county seat is 23km away from Fugu County/kloc-0, 437km away from the provincial capital Xi, 86km away from Taiyuan City, Shanxi Province, and 0/275km away from the capital Beijing/kloc-0. [3]

topography

There are continuous hills in the county, and there are two main mountains: one enters from Yulin in the northwest, extends to the southeast along Jia Luhe 120 km, and falls in the county; The other starts from Yuyang District and Mizhi, and goes northwest and southwest. Between the two mountains, ditches, streams, slopes, beams and headlands crisscross, and the terrain is complex. The altitude is between 675 ~ 1339.5m, with a relative height difference of 664m m. There are 33 gullies per square kilometer on average, with an average length of 2.12km. The relative height difference between the top of the mountain and the bottom of the ditch is 30-200m. The terrain is high in the northwest and low in the southeast; This mountain range starts in the northwest and ends in the southeast. The peak is low in the northwest and high in the southeast, extending to the Yellow River and becoming a cliff. Due to the serious soil erosion, the Mu Us Desert slowly invaded south, and gradually formed three distinct geomorphological divisions: the rocky mountainous area along the Yellow River in the southeast, the hilly and gully area in the southwest and the sandstorm area in the north. [4]

climate

Jia county is deep inland and belongs to the continental semi-arid monsoon climate in warm temperate zone. Winter is long and cold, and summer is short and warm.

The difference is big. Long sunshine time and abundant light and heat resources. Drought is the most serious natural disaster in Jiaxian County, which mostly occurs in spring and summer. The average annual precipitation for many years is 386~404 mm, and the climate is relatively dry. The interannual variation rate of precipitation is large,

The relative change rate is 80%, and the distribution is uneven during the year. The average annual precipitation can only meet the crop water requirement of 1/2. Precipitation is concentrated in July, August and September, and water use efficiency is extremely low. The annual extreme maximum temperature is

42.1℃ (June 22, 2005), the annual extreme minimum temperature is-24.4℃ (June 65438+February 27, 2002).