Analysis Of Mountain Landscape Changes Based On Remote Sensing

Landscape changes caused by human activities have a certain impact on global environmental change.The spatial differentiation of mountain landscape is complex.It is important to study landscape changes in mountain areas for regional landscape optimization.Therefore,taking Qianxi County as an example,Landsat TM/OLI images from 2001 to 2017 were selected with the help of ENVI 5.1 and eCognition 8.9 software.By using transfer matrix,change map,landscape dynamics and information entropy,the characteristics of landscape pattern change in the region were analyzed.Landscape spatial information and vulnerability were analyzed by landscape index.Finally,the driving forces of landscape change were analyzed.The following results are obtained:From 2001 to 2017,woodland,cultivated land,garden land and water decreased,but residential land,industrial,mining land and other land increased.The area of residential land landscape increased by 5634.22 hm~2,and the area of cultivated land landscape decreased by 4734.25 hm~2.In the aspect of landscape index,the distribution of different landscape types tended to be dispersed.The heterogeneity of landscape was enhanced.The fragmentation was low,and the trend was towards uniformity and diversification.The proportion of low vulnerable areas increased from 18.52%to 25.19%,and the proportion of high vulnerable areas increased from 15.97%to 20.86%.The areas with serious landscape vulnerability distributed in the central and northwestern regions of the study area,and the landscape vulnerability fluctuated greatly.Frequent replacement of landscape types in Qianxi County has led to an increase in vulnerability in some areas,mainly due to natural factors such as complex terrain and rising annual average temperature,coupled with increasing population,economic structure and a series of policy-oriented human factors.For the emergence of high landscape vulnerability in local areas,it is necessary to strengthen prevention and governance to ensure the ecological and sustainable development of the region.Figure 18;Table 15;Reference 74...