Which city is suitable for a person to relax?

Daocheng County, a world garden city in Chengdu, is located on the southwest edge of Sichuan and south of Ganzi Tibetan Autonomous Prefecture. Above the ground, it is 27 degrees 58'~29 degrees 30' north latitude and 99 degrees 58'~ 36' east longitude, with a length of kilometers from north to south and a width of 63 kilometers from east to west, with a square kilometer. The highest altitude in China is meters and the lowest altitude is meters. The elevation of this county is 1000 meters. Daocheng borders Muli County in Liangshan Prefecture in the southeast, Xiangcheng County and Zhongdian County in Yunnan Province in the west, and Ganzi Guangzhou in the north. The two mountains are divided into north and south, accounting for about one-third of the county. Cuisine is high in the north and low in the south, high in the west and low in the east. The mountains are rolling and rugged.

Rivers and Climate The three major rivers in Daocheng are Daocheng River, Chishi River and Dongyi River. The tributaries are Julong River and Echu River, all of which flow into Jinsha River from Shuiluo River in Muli County and belong to Jinsha River water system. Daocheng River, which originated at the southern foot of Haizi Mountain, has developed tributaries, wide terraces and a water flow of up to 1000 meters. The source of Songkhla River, the northern foot of Washan of Apollo, stretches for several kilometers. Dongyi River originates from the southern foot of Chushan, Russia, with a total length of 1000 km.

Daocheng has a plateau monsoon climate. The weather is sunny most of the morning, and even if it rains, it often lands at night. In alpine valleys, the annual average temperature is 1 1.5 degrees-12.8 degrees. In plateau area, the average temperature in Leng Yue is below -5 degrees, the average temperature in the hottest month is 10 ~ 12. 1 degree, and the lowest temperature in the whole year is 1 month, which can reach -27 degrees.

natural environment

Daocheng County is located on the east side of Hengduan Mountains and on the southeast edge of Qinghai-Tibet Plateau, with complex terrain, high in northwest and low in southeast, and rugged mountains. From northwest to southeast, the county is divided into three types: the typical hilly plateau in the north, the mountainous landform area in the middle and the alpine canyon area in the south. The highest peak in the territory is Sagnieri in Gongga Snow Mountain in the south, with an altitude of meters, and the lowest point is Sekong Village in the south of East Zone 1, with an altitude of meters and a height difference of meters.

Daocheng County mainly has the following landform types:

(1) Mountainous area: The landform with a relative height greater than meters in a small area can be divided into four types according to the altitude, namely, low Zhongshan, Zhongshan, high mountain and extremely high mountain. Only the first three types have been found in Daocheng County, Dongyi District belongs to the low-Zhongshan and high-mountain type, Gong Ling District belongs to the middle-mountain and high-mountain type, and Daoba District belongs to the middle-mountain and high-mountain type.

(2) Plateau: a landform type with an altitude of more than meters and a relative height of more than meters in a small area. According to the different relative heights, it can be divided into three types: high plains, hilly plateau and plateau. There is only high plains in Daocheng County. Mulberry piles, Rubu, Riverside, Salad and Murado in Daoba area are used in high plains.

(3) Flat dam: the flat dam ground with a surface slope of less than 7 in the valley area below meters above sea level. Some areas in Daocheng County, such as Shengmu, Songka Township, Riwa Township and Mengzi Township, belong to Pingba landform type.

Geomorphological zoning: Daocheng County is naturally divided into three types: the wide valley area in the northern plateau, the Daocheng River in Haizishan, with an altitude of ~ meters and a height difference of meters, hills, glacial rock basins and fault basins are all over the surface, and the grassland is vast, which is a good base for the development of animal husbandry and belongs to a mature area; In the central plateau area, the Pianka River in Powa Mountain belongs to the alternating area of one crop and two crops; In the alpine valley area in the south of Chushan, Russia, the Yi River in the east is about meters above sea level, with developed streams and dense forests, which is suitable for the development of economic trees, and belongs to a two-year cropping area.

mountain range

1. Haizi Mountain: Haizi Mountain belongs to shapley Mountain in Hengduan Mountain System, located in the northern plateau of the county, between Sangdui, Rubu, Shengmu Township, Litang and Xiangcheng County in the Daoba area. It is the Daocheng ancient ice cap, the five ancient ice bodies on the Qinghai-Tibet Plateau. Haizishan has a large number of Haizi in many square kilometers, and its scale density is unique in China, so it is named Haizishan. Haizi Mountain spans 29 02' ~ 32 53' north latitude and 99 56' ~ 30' east longitude. It is oval with a long axis of 93 kilometers and a width of 47 kilometers. In Muli County, more than one third of Wang Zhan is more than 60 kilometers long, 32.5 kilometers wide and square kilometers, with an average elevation of meters, and the highest peak is meters above sea level on Guoyin Day.

The glacial landform of Haizishan is very developed, and glacial rock basins are scattered all over the country, which is rare in China. The genesis of rock basins can be divided into two types, one is pure erosion type and the other is erosion accumulation type. The scope of the ancient ice sheet is the same as that of the Qinghai-Tibet Plateau. Haizishan mountains are undulating and the peaks are overlapping. The ridge is multi-li-shaped, sheep-back-shaped, with wide terrain, full of boulders and granite, belonging to Yanshan argillaceous granite stratum. Surrounded by ravines, the slope is gentle, the resources are rich, and the scenery is beautiful and charming.

Li Xiang Highway (Litang to Xiangcheng) runs through the middle of Haizi Mountain. It has become an important throat leading to Daocheng, Xiangcheng and Derong counties. "Dinosaur Tooth" fossils and "Eucalyptus" fossils in the southern foothills were excavated near Daoban, 75 kilometers away from Haizishan in.

2. Gongga Mountain: Gongga Snow Mountain in Daocheng County belongs to the snow-capped mountain range in Hengduan Shandong Province, also known as Gongga Japan and Russia (meaning the big snow-capped mountain that does not snow all year round). Located in the south of Daocheng, the highest peak is Saneri, the northern peak, with an altitude of 1000 meters. Nanfeng yang maiyong Meters above sea level; The east peak is in Chanuoduo season, with an altitude of 1000 meters. It stretches for 36 kilometers and covers an area of 1 square kilometer, forming three peaks, which are magnificent. There is a "colorful sea" halfway up the mountain, which is colorful and beautiful.

Water system and hydrology

river

1. Daocheng River: Daocheng River is the upper reaches of Luohe River, the first branch of Jinsha River system, and it is a perennial river. Originated at the northern foot of Haizi Mountain in northern Daocheng County, it flows from north to southeast, passes through Sangdui, Rubu and the east of Shengmu Township, and flows into Litang and Muli County. After several sharp turns, it turns back to the east edge of Daocheng County to meet with Julong River, and then flows south into Muli County, which is called Shuiluo River and flows into Jinsha River.

Daocheng River, with a total length of kilometers, is one of the three major rivers in Daocheng, with developed tributaries and a basin of square kilometers. River width 15 ~ 25m, water depth 0.6 ~ 4m, flow rate 3.5m3/s, annual average flow rate 14.79m3/s, with a drop of m, which is beneficial to farmland irrigation and power generation.

2. Songka River: Located in the middle of Daocheng County, Songka River originates from the northern foot of Apollo Wa Mountain. It is a perennial river and consists of four main streams: Dexitang, Lamu, Mars and Gongjian. From northwest to southeast, it flows through Mula, Songka, Ziwa and Mengzi townships, crosses Gong Ling area, and joins Tangqu in the upper reaches of Shuiluo River in Muli County, Heishui Village, Mengzi Township, which belongs to the second tributary of Jinsha River system. The river is 1000 km long and is one of the three major rivers in Daocheng County.

3. Dongyi River: Dongyi River is located in the south of Daocheng. Because it runs through Dongyi District, it is named Dongyi River. It originated in the northern foot of Shanxi in early Russia, and flows from north to south through Geka, Jiga, Eya and other villages. It goes straight to Muli County and is called Tianchong River, and then flows out of Luohe River into Jinsha River. With a total length of kilometers, it is one of the three major rivers in Daocheng County, a perennial river and a secondary tributary of the Jinsha River system.

Lake-Xingyicoo: Xingyicoo Lake, located in the middle of Haizi Mountain, 36 kilometers northwest of Sandui Township, is a relic of ancient ice. It is located at 29 24' north latitude and 05' east longitude, meters above sea level, with erosion accumulation type, surrounded by ice retreat and moraine below.

Xingyiku is a Tibetan language, which means "offering a lake" and is famous for its alpine natural reservoir in Daocheng County. Xingyi CuO is a triangular lake with an area of 7.5 square kilometers. It is a pot-shaped perennial freshwater lake. Generally, the water depth is about 3 meters, and the deepest reaches tens of meters. White waves are rolling and magnificent, and the lake is rich in plateau yellow croaker. Xingyi CuO is the main source of Daocheng River.

1920, a dinosaur tooth fossil was found near Xingyi Cuo.