| Under the background of abnormal climate change and rapid socio-economic development,the impact of human beings on the ecological environment is increasingly deepened,especially in the more developed areas.With the rapid development of urbanization and industrialization,the problem of vegetation destruction and restoration cannot be ignored.Therefore,promoting the artificial intervention of vegetation cover or conducting research on the sustainable development of ecological environment will contribute to the stability,harmony and well-off life of human society.Further research on the status and future of vegetation cover changes and ecological precision restoration are still the focus of human attention.This study uses the Sen trend method,the MK test method,and the Hurst index to analyze the past,current status,and future evolution trends of vegetation cover in the Guanzhong area.The residual method is used to strip the natural factors that affect vegetation cover and obtain the artificial factors that affect vegetation cover.Based on the analysis of temporal change characteristics,spatial distribution characteristics,spatial change trends and future evolution trends,the artificial impact of vegetation cover is analyzed,and the specific direction of artificial impact on vegetation cover is decomposed by using a geo-detector model.The main conclusions are as follows:(1)The vegetation cover in Guanzhong area showed an improvement trend from 2001 to 2018,but it will show a trend of degradation in future changes.On the time scale,the vegetation cover in the Guanzhong area showed an upward trend and then a downward trend in the past 18 years(2001-2018).In terms of spatial changes,the high-value areas covered by vegetation are mainly distributed in the north and south sides of the Guanzhong area,and the low-value areas are mainly distributed in the middle of the Guanzhong area,that is,along the Weihe River,and the spatial change trend is benign improvement.However,in the future,the vegetation cover will develop as a whole,especially in areas with improved vegetation cover,and the trend of degrading will be large.Attention should be paid to the recurrence of the problem of vegetation deterioration in the vegetation improvement area.(2)The artificial impact of vegetation cover in the Guanzhong area developed in a positive trend from 2001 to 2018,but in the future evolution trend,an artificial impact negative trend was developed.On the time scale,the artificial impact of vegetation cover in the Guanzhong area has been developing in a continuous wave from 2001 to 2018.From the perspective of spatial distribution characteristics,areas with strong man-made impacts of vegetation cover are mainly distributed in the northern and central eastern part of Guanzhong region,and areas with slight man-made effects are mainly distributed in the south of Guanzhong region.From the perspective of the spatial change trend,the overall development is positively affected by artificial effects(67.73%of the positively affected areas are greater than 32.27%of the negatively affected areas).However,in the future evolution trend of artificial impacts of vegetation coverage,the trend of artificially influenced negative effects The negative action area(58.92%)is larger than the positive action area(41.08%).(3)The artificial impact of vegetation cover has certain synergy and restriction with the change of vegetation cover.The rising and falling areas of vegetation cover are basically consistent with the negative and positive action areas of human impact of vegetation cover.Based on the temporal change characteristics,spatial distribution characteristics,spatial change trend,and sustainable analysis of vegetation cover in Guanzhong area,and comparison with the artificial impact of vegetation cover,it was found that:the vegetation cover change in Guanzhong area was greatly affected by human,and the positive effect of the artificial impact of vegetation cover It is mainly distributed in the north and south sides of the Guanzhong area,and the negative action area is mainly distributed in the middle and eastern parts of the Guanzhong area,which is basically consistent with the rising and falling areas of vegetation coverage.(4)Among the factors that are artificially affected by vegetation cover,land use is the factor that has the strongest impact on the artificial effects of vegetation cover.The effects of each factor on the artificial effects of vegetation cover are different and dynamic in different years.It reflects the diversification and complexity of human factors' effect on vegetation cover.Factor detection and interaction detection are performed on the seven main human factors affected by vegetation cover,and it is concluded that traffic,population,and GDP have similar volatility,urbanization rate and urban distribution have similar volatility,and land use and high level scenic spots have similar volatility,And the influence of each factor on the artificial impact of vegetation coverage does not change regularly with time,and it shows a dynamic change,that is,the degree of influence of each factor on the artificial impact of vegetation coverage varies with economic and social development in different years.From the perspective of the impact of various factors in the same year,land use is the most influential factor in the artificial impact of vegetation cover.In the interaction,the effect of the two-factor interaction on the vegetation cover's human impact is greater than the influence of its list,and the overall presentation shows that over time(socio-economic development)the influence of the two-factor on the vegetation cover's human impact gradually weakened,and gradually transformed into a multi-factor effect,That is,from the non-linear enhancement to the two-factor enhancement,it is reflected in the diversification of socio-economic development and the complication of human factors in vegetation coverage. |
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