| The landscape interference effect of the expanding road is more obvious.In order to avoid the unnecessary risk of landscape fragmentation,it is necessary to take full account of the interference factors in the development and utilization of forest resources.In this study,in order to protect and enhance the Changping District Ming Tombs forest landscape quality of Beijing City,using forest management inventory data and road network vector information,complete the analysis of forest function zoning and landscape pattern.After finishing the system of road classification of the study area,by road buffer analysis,road node analysis and road interference quantitative analysis methods,analysis and evaluation of the distribution of road network in the study area,and then in order to provide theoretical basis and reference data for Ming Dynasty Tombs forest landscape protection,puts forward the forest road planning advice.(1)Combined with the topography,accessibility,forest landscape function and characteristics,the study area was divided into four parts:forest recreation area,forest landscape area,ecological conservation area and auxiliary functional area,and then established their respective functional positioning.(2)With the software support of ArcGIS and Fragstats,the landscape pattern of the study area was analyzed from the aspects of composition,quantity and heterogeneity in 3 different classification systems by using 12 landscape pattern index.The results showed that forest land is the dominant landscape which the connectivity is best among all landscape class;the distribution pattern and edge complexity of artificial forest was higher than that of natural forest;the analysis of the road buffer showed that the walk path had the greatest impact on the study area landscape;the statistical analysis of road nodes shows that the number of nodes and the spatial distribution are reasonable in all kinds of landscape systems,forest recreation area can increase road network construction according to demand.(3)After evaluating the road network in the study area,construct a road disturb index including traffic intensity,neighborhood interference and nearest effects,quantitative analysis was used to evaluate the potential impact of forest road on forest landscape and the spatial distribution pattern of road disturbance index was constructed.The results show that the use of road interference index could reflect road interference in the region,coniferous forest area is the most serious threat from potential interference(GENERAL_SRDI is 41.87);the main dominant species of Pinus bungeana by potential interference(65.92),the biggest threat to focus on monitoring;the degree of road disturbance in forest landscape area should be reduced properly;spearman rank correlation test revealed that among the three sub-indices of the road disturbance index;nearest disturbance(N)has the most significant effect on the final index(0.99).On the basis of the above research results,this paper sums up the strategic point of view of road planning at the ecological level,and puts forward some suggestions on the construction and management of forest road in Ming Tombs forest farm. |
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