The geographical environment of Anze County

Anze County is located in the east of Linfen City, Shanxi Province, at the southeast foot of Taiyue Mountain, at the junction of Linfen, Jincheng and Changzhi, and adjacent to Tunliu County and Zhangzi County in the east.

It is connected to Guxian County and Fushan County in the west, Qinshui County in the south and Qinyuan County in the north. It is about 65 kilometers long from north to south and 45 kilometers wide from east to west. National Highway 309 and Provincial Highway 326 run through the whole territory. Anze county has a complex terrain, and the overall terrain is high in the north and low in the south. The peaks in the east are Mount Antai, Quanmiao 'ao and Panxiu Mountain. , all above sea level 1400 meters. Mount Antai is the highest, with an altitude of1592m, and there are Dadonggouliang and Niutou Mountain in the west, with an altitude of1000m. The Qinhe River basin in the south is low-lying, with a small plain, about 800 meters above sea level.

Anze belongs to a mountainous area with low rocks. Later, influenced by crustal movement, the east and west wings rose high and the middle valley fell relatively. Within the territory, the mountains are undulating, the mountains are self-contained and the ravines are vertical and horizontal, forming a scene of overlapping mountains, vertical and horizontal ravines, hilly development and deep valleys. The whole terrain is high in the north and low in the south. According to the location, topography, height difference and soil type of each place, the landform can be divided into three types: Zhongshan District, Low Mountain Area and Chuangu District. Zhongshan District, also known as Shishan District, is located in a deep mountain valley on the east and west edges, with a relative height of 200-500m and a slope of 30-40. The soil layer between mountains is barren, and a large area of rocks are exposed. Vegetation is generally between 40% and 50%, accounting for about 35% of the total area of Anze County. The low mountainous area, also known as hilly area, is located at the watershed between the west of Qinhe River and Fen River, along Paomaling, Sanbuling and Pishan in the east of Qinhe River, with an altitude of 800-1300m. There are small plains and loess sites with a slope of about 20-30, and the vegetation is both arbor and shrub, mainly grass, accounting for about 58% of the whole area. The valley area is distributed in the valley area between 732-900 meters above sea level, which is generally formed by river siltation and mountain flood accumulation, and appears in the first terrace on both sides of Qinhe River and its main tributaries. There are beaded plains in Qinhe River Basin, with flat terrain and high groundwater level, which is the main agricultural area, accounting for about 7% of the total area of Anze County. Anze is located in the Qinhe River Basin. Qinhe River north starts from Anze County and Yiting Village in Sichuan Town, enters Anze territory, and leaves Mabi Village in the south, and flows through Anze County for 95 kilometers. The larger tributaries in this section with a watershed area greater than 100 km ㎡ include Hongyi River, Helin River, Dahuang River, Liyuan River, Fifth River, Tangyi River, Kongcun River, Wangcun River, Sihe River and He Lan River. The inflow of Qinhe River is 207 million m3, the natural runoff is 31.70 million m3, and the total outflow is 524 million m3. The water quality is mainly bicarbonate, which belongs to medium hard water.

Anze County has a total water volume of 65.438+0.9 billion cubic meters and a total groundwater resource of 65.438+0.654.38+0.3 billion cubic meters, which belongs to low salinity fresh water. Most of them are distributed in the first and second underground levels on both sides of the Qinhe River and its tributaries, and the phreatic water is 5-250m away from the surface, with sufficient recharge and easy exploitation.