| Natural heritage sites are the most precious natural resources in the world and are listed by UNESCO as the commonwealth of people all over the world.In response to the national“Belt and Road” initiative,research on digital heritage sites along the “Belt and Road” is listed as an important research object.This article focuses on the natural heritage sites with forest characteristics;using remote sensing technology from three aspects: forest feature elements,human disturbance intensity,and ecological environment quality,from theoretical exploration to case analysis to the large-scale application;The detailed analysis of the heritage sites and the comprehensive evaluation of 66 forest-featured natural heritage sites along the "Belt and Road" will help the development of digital heritage protection and the construction of digital data on "Belt and Road".Improvement of the traditional forest disturbance DI algorithm:(1)The data denoising and best image synthesis in the same season were finished on Google Earth Engine(GEE)platform.(2)It can extract the long time series forest disturbance information of Huangshan Natural Heritages Sites from 1988 to 2017 by combining the characteristics of Landsat Time Series(LTS)and the disturbance characteristics for three constant years.(3)The accuracy of the extraction results is evaluated according to the pixel scale,field data and reference data.The results show that the DI value of the data after noise reduction is low in dispersion,the standard deviation σ is 0.91;the overall extraction accuracy of forest disturbance is 80.66,and the RMSE is 0.406.Fine analysis based on the extracted disturbance information of Huangshan Natural Heritage Site:(1)Firstly,the study on Huangshan Natural Heritages Sites and the trend of its human disturbance intensity were used human disturbance data from 1993 to 2016.(2)Secondly,the ecological environment quality of natural heritage sites was based on the Remote Sensing Ecological Index(RESI)from 1988 to 2017,analyzing the main influencing factors.The results show that the human disturbance activities have reduced to 50.36% of the regions from 1993 to 2009,the average of human disturbance has increased by 8.33% of regions from2009 to 2016.During 1988-2017,the eco-environmental quality of Huangshan Natural Heritage site showed a downward trend and then an upward trend;the environmental quality of the heritage area was more stable than that of the buffer zone;the correlation coefficient between RESI and WET was 0.855,which was weakly correlated with human disturbance(HD).According to the research methods of Huangshan Natural Heritage Site,66 forest-featured natural heritage sites along the “Belt and Road” were studied:(1)Natural heritage sites in each economic corridor from 2001 to 2017 Forest loss area,forest loss rate;Anthropogenic interference intensity from 1993 to 2016 and change analysis of RESI from 1988 to 2017;(2)66 natural heritage sites along the "Belt and Road" in heritage areas,primary buffer zones and secondary buffer zones Comparative analysis of forest loss,man-made disturbance,and ecological environment quality in the area.(3)Analyze the correlation of the 12 relevant elements of the natural heritage site,and conduct a comprehensive evaluation of 66 natural heritage sites along the "Belt and Road" in combination with a comprehensive evaluation model.The results show that the degree of forest loss in natural heritage sites in the "Indochina Peninsula" and "Sea Silk Road" economic corridors has gradually increased;48.50% of the forest natural heritage sites along the " Belt and Road " are at a higher level of human disturbance,and 50.00% of forest The quality of the natural environment of the natural heritage site has deteriorated;the Tropical Rainforest Heritage of Sumatra natural heritage site in Indonesia has the highest comprehensive impact intensity,with a comprehensive impact intensity of 1.8,and the accuracy of the evaluation result of "mildly concerned" natural heritage is 0.82. |
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