Wafangdian physical geography

Wafangdian city (managed by Dalian City, Liaoning Province, ranking 27th among the top 100 counties and cities in 2009) is located in the central and western part of Liaodong Peninsula, between 39 20' and 40 07' north latitude and12113' ~122/kloc-east longitude. It is adjacent to Pulandian District in the east, Bohai Sea in the west, Jinzhou District across the sea in the south and gaizhou city in the north. The total area of the city is 3793.53 square kilometers. The coastline is 46 1.2 km long, accounting for 24.2% of the total length of Dalian coastline 1906 km, of which the land coastline is 423.2 km long. Domestic transportation is very convenient, extending in all directions. Changda Railway, Harbin-Dalian Highway and Shenyang-Dalian Expressway run through the north and south, Chengba Highway runs through the east and west, and the east-west passage in northern Dalian runs through the three northern towns. The urban area is 292km away from Shenyang in the north and Dalian 104km away from Dalian in the south. Wafangdian city's topography is high in the northeast and low in the southwest, and the remaining veins of Qian Shan extend from the northeast to the southwest, forming a variety of landform types combining low mountains, hills, plains, land and beaches. The natural composition is generally "six mountains, one water and three fields". Wafangdian city is rich in mineral resources, with a wide variety of minerals, including more than 30 kinds of metallic and nonmetallic minerals. In particular, nonmetallic minerals have large reserves and high grade, which have great development value, including granite, marble, limestone, clay shale, sea pebbles and other reserves of about 650 million cubic meters. Gold, silver, zinc, phosphorus and other mineral deposits also have considerable reserves. Wafangdian city is known as the "Oriental Diamond City". The diamond reserves account for 54% of the proven reserves in China, mostly octahedral and 12 faceted, with excellent texture, complete crystal shape, crystal clear color and 70% jewel-grade content, which is a first-class level in the international market.

Natural mineral springs in China are rich, pure and sweet, containing strontium (Sr), bromine (Br), radon (Rh), low sodium salt (Na), metasilicic acid (H2SiO3) and other 16 kinds of trace elements beneficial to human body. At present, the state and province have identified 9 places and developed 4 places. The territory has high-quality underground thermal energy resources. Located in the underground hot mineral spring of Longmentang in Xutun Town, the water temperature is 63℃ and the daily water supply is 2000 tons. It contains 10 kinds of trace elements needed by human body. It is an ideal high-temperature hot mineral spring for bathing and drinking.

Limestone resources in China are widely distributed, spanning three geological ages, with high quality and large reserves. Cao content is mostly 50%-53%, and most of it is exposed to the ground, distributed in more than 10 towns, with an area of 327 1 square kilometer, accounting for 8.62% of the city's total area, with a storage capacity of more than 65,438 billion cubic meters, which has great development potential. Rivers in Wafangdian city are seasonal, with small flow in winter and spring, and most of them are cut off. Most rivers enter the sea alone, with short source and rapid flow, and short flood confluence time. There are large and small rivers 1 18 in the city, and the drainage areas are Fuzhou River, Dashahe River, Dufu River, Gulan River, Taowei River, Antarctic River, Yongning River, Jiudaohe River, Anzi River, Hongyanhe River and Huitou River, among which Dufu River is the boundary river, Dashahe River and Anzi River.

The largest river in wafangdian city is Fuzhou River, with a drainage area of 1638km2, of which Wafangdian area is 1342.7km2 ... Fuzhou River originates from the southern foot of Laomao Mountain in Yitong, pulandian city, and is the second largest river in Dalian. Pulandian city pine, Deli Temple, Taiyang, Laohutun, Fuzhou, Xianyuwan, Yangjia, Santaizi and other towns 18 join the Bohai Sea at Laoyangtou, Xilan Banner, Santaizi Township. Total length of main stream 137km. There are 8 first-class tributaries, including 4 on the left bank, with Lancang River as the largest; There are four on the right bank, with Jiudaohe as the largest. The river belongs to a mountain stream, and the average river gradient is 1.5‰. The average annual runoff of the basin is 342 million m3. There are two large reservoirs, Songshu Reservoir and Dongfeng Reservoir, and Qidaofang Reservoir 1 medium reservoir on the main stream of the basin. There are three medium-sized reservoirs on the tributaries-Jiulong Reservoir, Lianhua Reservoir, Dahe Reservoir and seven small reservoirs. Wafangdian city city life and industrial and agricultural water mainly comes from rivers. 197 1 year, Songshu Reservoir will be built in the upper reaches, with a drainage area of 302.4km2 After reinforcement, the total storage capacity of the reservoir will be167 million m3, and that of Li Xing will be 9102 million m3. It is a large reservoir for flood control, irrigation, water supply and comprehensive utilization of fish culture, and mainly undertakes the following tasks. Dongfeng Reservoir was built in the lower reaches of the river in 1992, with a total storage capacity of1420,000 m3 and a storage capacity of 93.7 million m3. Wafangdian belongs to the temperate continental monsoon climate zone, with four distinct seasons, with an annual average temperature of 9.3℃, a frost-free period of 165- 185 days, an average precipitation of 580-750 mm, and an annual total solar radiation of 143.3 kcal/cm2.