Study on Land Use Change and Driving Mechanism of Typical Basin in Semi-arid Area of Loess Plateau
Using remote sensing image data in 2000,2010 and 2020,the land use/cover changes in Guanchuan River Basin were analyzed based on the principles of geography,the dynamic degree of land use,land use intensity,and land use type mutual transformation degree..The results showed that Plough and Grassland were the main types of land use change in the Guanchuan River basin.The area ratio is Plough＞Grassland＞Shrub＞Artificial surface＞Woodland＞Water area.The area of plough remained about 69％,and the area of grassland remained more than 25％.On the one hand,the area of plough,shrub and water area decreased by 3 374.82 hm2,11 318.17 hm2 and 103.62 hm2,respectively.On the other hand,the area of woodland,grassland and artificial surface increased by 128 hm2,8 765.59 hm2 and 5 903.01 hm2 independently in the past 20 years.The dynamic attitude of comprehensive land use in the last ten years of the study period was significantly higher than that in the first ten years,with an increase of 79.9％,indicating a high degree of comprehensive land use.From 2000 to 2010,plough and water area were transferred out,and woodland,grassland,shrubland and artificial surface were transferred in.Besides,from 2010 to 2020,plough and shrubland were transferred out,and woodland,grassland,water area and artificial surfaces were transferred in.The effect of social factors on the changes of land use pattern in Guanchuan River Basin is much more obvious than natural factors.In conclusion,the purpose of this study is to effectively deal with the relationship between human activities and land development,and provide scientific basis for controlling water and soil loss,adjusting land use structure,developing local economy,and protecting ecological environment.
Guanchuan river basinland use change characteristicsprincipal component analysisdriving mechanism
NETL
NSTL
万方数据
