The county has a total area of 2,250 square kilometers and cultivated land1938,200 mu. It belongs to the plain hilly area on the southeast edge of the Huang-Huai-Hai Plain, and the terrain in Donghai County is long from east to west and north to south.
Short, the maximum distance between east and west is 70 kilometers, and the maximum distance between north and south is 54 kilometers; The terrain is high in the west and low in the east. The central and western plains are hilly, the eastern part is flat, and the lake swings into the sea.
Donghai mountain range
The main mountain ranges in the territory are Yushan in the northwest, Moshan in the north, Niu Shan, Anfengshan and Fangshan in the south, among which Yushan is the highest, with an altitude of 269.5 meters. Yushan is located at the junction of Sulu, 30 kilometers southeast of Linshu County. The flat ground rises, and the east-west direction is like a pen. The main peak is 269. 15 meters above sea level and about 7.5 kilometers long.
East China sea hydrology
Donghai county is located in the lower reaches of Huaihe River and Shuhe River. Rivers in the territory belong to the lower reaches of Yihe River and Shuhe River, and the main rivers are Xinshu River, Hu Aishu Xinhe River, Rose River, Hehe River, Shi 'an River and Hehe River 16. Except for Shi 'an River and Lianglong River, most other rivers flow from west to east and join the Ross River into the sea. Xinshu River: Shuhe East Branch of Daguanzhuang, Linshu County, Shandong Province, is one of the main flood discharge channels in Yishu Sihe River Basin, and also the key project of Yishu East Water Transfer Project. The drainage area below Daguanzhuang and above Liang Shi River Reservoir is 976km2. The total length from Daguanzhuang to the estuary is 80 kilometers, of which the total length from Liang Shi Reservoir to Jiangsu estuary is 45 kilometers, and the river beach area is 50,000 mu. 1974 The maximum flood discharge of Liang Shi River Reservoir sluice is 3490 m3/s Rose River: Rose River is the only drinking water source in Lianyungang. Lulan River "Lulan River is the longest river in Donghai County, which flows through nearly half the towns in the county and is also an important irrigation canal.
East China sea climate
It belongs to warm temperate humid monsoon climate, with abundant sunshine, rain and heat in the same season and four distinct seasons. The annual frost-free period is 225 days, with an average annual sunshine of 2394 hours and an average annual precipitation of 9 13mm.
Natural resources in the East China Sea
Mineral resources are abundant and of high quality. Up to now, 37 kinds of minerals have been discovered and identified, including 29 kinds of nonmetallic minerals. Crystal, timely, serpentine, rutile, dolomite and other large reserves, ranking first in the province or the whole country. The total crystal reserves are 300,000 tons, and the timely reserves are 300 million tons, ranking first in the country in terms of reserves and quality. It is a world-famous "Crystal Capital". The existing "Crystal King" in geological museum belongs to Donghai County, and Chairman Mao's crystal coffin is mainly made of Donghai crystal. In addition, basalt reserves are 65.438+billion tons, and rutile (titanium ore) is one of the large-scale deposits in China. Agricultural and sideline products are very rich. It is one of the top 100 counties with comprehensive agricultural strength in China and the first batch of 50 commodity grain base counties in China. It is a national model county for greening and an advanced county for economic forest construction. It is also a peanut production base, a lean pig base and a fruit base in Jiangsu Province. The annual output is 900,000 tons of grain, 6,543,800 tons of oil, 6,543,800 tons of melons and vegetables, 60,000 tons of fruits, more than 6,543,800 pigs and 250,000 large livestock. Tourism resources are unique. It has four characteristics of "one stone, one water, one lake and one well". "One stone" is the crystal stone. China Crystal Crafts City is the largest distribution center for crystals and their products in China. The 7th China Donghai Crystal Festival was successfully held, and Donghai Crystal brand started in a wider scope. "Yishui" is hot spring water. Donghai Hot Spring is known as "the first hot spring in East China", and the hot spring tourist resort is a well-known tourist attraction. "One Lake", namely Hailing Lake, is the largest artificial reservoir natural scenic spot in Jiangsu Province. "One Well" is a scientific drilling well in Chinese mainland, the first deep well in Asia and the third deep well in the world, and an important base for popular science geological tourism and popular science education.