Analysis Of Oasis Changes And Driving Forces In The Lower(Upper Section) Of The Tarim River

Oasis is the main place for human life and production in arid areas,and it is an important rely on the normal operation of the regional economy.With the stability of the oasis,various economies and cultures can be further developed.This article mainly studies the development of oasis and its driving force.Taking the oasis in the lower reaches(upper section)of the Tarim River as an example,using the data collected from the fifth period of 1987-2017 remote sensing image maps,statistical yearbooks and field visits Classification,land use transfer matrix,dynamic degree of single land use type and principal component analysis method quantitatively and qualitatively analyzed the change characteristics of the oasis in the lower reaches of the Tarim River(upper section)and carried out natural and human aspects on the driving factors affecting its changes Discussion.The main findings are as follows:(1)From 1987 to 2017,the area of artificial oasis continued to grow.The main reason was that it continuously cultivated grains and other crops to meet the living needs of the people in the region and the economic development of the research area.The development of agricultural technology and changes in irrigation methods are more government investment and more and more affordable policies,which have brought many changes to this study area.Cotton,fragrant pears,red dates and other crops and drought resistance and salt tolerance The number of Populus euphratica and sand jujube trees as protection forests is also increasing,which ensures the coordinated development of agriculture,improves the quality of life of farmers and herdsmen,and promotes the protection of the environment.(2)Natural oasis is transformed into artificial oasis through human development and utilization.Artificial oasis is mainly transformed into natural oasis through some policies and measures such as returning farmland to forest and returning farmland to grass.The process of natural oasis and artificial oasis turning into desert is mainly due to environmental degradation caused by vegetation degradation,soil desertification and salinization caused by water shortage and unreasonable development and utilization of land.If there is enough water in the desert,there can be vegetation regrowth or artificial planting and cultivation,and then the development and utilization methods can be transformed into other types.(3)The water resources in the study area are mainly maintained by the water volume of the Tarim River,and then regulated through reservoirs,that is,ecological water delivery.With the increase of the runoff from the source of the Tarim River Basin,the amount of water entering the main stream of the Tarim River gradually decreases.From the perspective of water consumption in the reach,the average annual water consumption in the lower reaches of the Tarim River is less.The trend of surface runoff in the main stream decreases as the river flows down the river.The decrease in the area of natural oasis is partly related to runoff.Throughout the process,the area of the water area fluctuates.In addition to the impact of runoff,changes in the amount of ecological water transport will also affect the change in the area of the water area.(4)Through principal component analysis and some economic profile data,it can be concluded that economic investment and the implementation and implementation of relevant policies issued by the society and the government,Hebei Province 's support to Yuli County and the Second Agricultural Division,the continuous improvement of agricultural technology and the improvement of the professional level of technical personnel Various protections such as protection awareness,land protection,and desertification prevention are also an important part of the factors that affect the oasis changes in the lower(upper)Tahe area.