Sui, Tang And Song Dynasties Hetao Plain Pattern Of Political Geography And The Natural Environment

Hot'ao Plain located at the top of "a few"-shaped bend of Yellow River which is a high altitude plain. Now the vegetation of Hot'ao Plain is desert and semi-desert, desert steppe and dry steppe. There is a small amount of forest that most of it is secondary forest in Wolf, Ural Mountain, Castle Peak and other mountains,. Natural vegetation in the plain is the result of historical development. The turning point in the Hot'ao plain from prosperity to decline is from the Sui and Tang to Song Dynasty.Dramatic changes in political landscape have enormous impact on the natural environment.Sui and Tang dynasties, most of the time Central Plains rule Hot'ao Plain. Sui set counties and the construction of military facilities to control of the Hot'ao Plain. In zhenguan dynasty years Tang Dynasty beat the Eastern Turks and control of Hot'ao Plain again. Tang Dynasty establish three political system in the Hot'ao Plain and many military cities in the north of the Hot'ao Plain. Hot'ao Plain become the first line to control of northern border.In the Sui, The relation of the Sui with the Turkic is ease,and very frequent exchanges between the two parties. But the relation become worse later. Hot'ao Plain become a major regional integration of national communication because of enlightened national policy.Later the contradictions of the North and Central dynasty gradually sharpened.There are ethnic wars some times.After the Sui and Tang dynasties, the Hot'ao Plain were in charge by several government. Dangxiang rove around as a nomad in the late Tang Dynasty on Hot'ao Plain and Ortos Plateau. The Xi Xia occupies most of the Hot'ao Plain. Liao Government which Khitan established occupies the eastern plains, Jin,which beats Liao, although lost Jinsu and Heqing but still retains the eastern of the Loop.Xi Xia,Liao,and the Jin has been in conflict and also had a period of peace in the Hot'ao Plain.In the last Mongol regime unified Plain Loop.The Sui and Tang dynasties, The main river of Yellow River of the Hot'ao Plainis the North River. The location of the North River River is to the north than this. But the location of South River is to the South than this. Tu Shenze dried up due to lack of water supply from the Yellow River. The new lakes, such as Maipo, Jinhepo and the "Great Park", form on the Hot'ao Plain.The hard work of Sui and Tang on the Hot'ao Plain has changed the natural face of the plain. The Sui and Tang make a series of measures to develop agriculture.Nomadic groups and the government-run farms graze on the Hot'ao Plain's pasture.During the Liao Jin and Xia periods, the natural environment of the Hot'ao Plain return to the status of grassland-base. There are desertification phenomenon signs in the Tang Dynasty on the Hot'ao Plain. During the Liao Jin and Xia periods, the degree of desertification deeped because of the lack of abandoned farmland protection in early time.During the Sui and Tang to Song Dynasty, the political environment on the Hot'ao Plain is volatile, which is from the Frontierthe of Dynasty unified to the border zone of the separatist regime. Hot'ao Plain also left footprint of the many national. During this period the natural environment has a huge change, the sandy desertification of the Hot'ao Plain become a significant sign.The different attitudes result in Development of different ways on the Hot'ao Plain between Dynasty unified and the separatist regime.The Sui and Tang seem positive. They develop the economy of the Hot'ao Plain as an important area to the Hot'ao Plain.Various economic activities went well because of the efforts of the local military and civilian. Liao,Jin and Xi Xia is not so positive for the Hot'ao Plain.Although they also set military institutions in the Hot'ao Plain, but has little to economic development. Changes in political changes becomes an important factor of the natural environment. The war, the garrison and reclamation have greatest impact.The different attitudes of the Unified dynasty and the local government on the Hot'ao Plain result in the different development ways on the Hot'ao Plain.