Research On The Design Of Rehabilitation Function For Recreation Trails

With the rapid progress of urbanization,urban environmental pollution is becoming more and more serious,which becomes the key to threatening how to protect the physical and mental health of urban residents and the sustainable development of the economy and society.As a"dispatcher"of nature,forests have the functions of relieving stress,strengthening physical fitness,and sterilizing and curing diseases.Forest rehabilitation bases have gradually become the central venue for people to regulate their physical and mental health.Recreational trails,as the main ecological corridors and tourist routes in the forest,play an important role in the connection of the recreational function area and the improvement of the overall function.In the past,most researches on recreational bases focused on the construction of functional areas,while ignoring the role of recreational trails.Based on this,this study used geostatistics and ecological field theory techniques to take the recreational trail of colorful stone stream geotrail of Taishan scenic spot as the object,11 different plant configuration recreational trails were selected,the dynamic changes of factors were analyzed,and the characteristics and influence mechanism of spatio-temporal changes of factors were discussed.The technical model for improving the effect of rehabilitation was discussed,and then the design technology for the enhancement of the recreational function of recreational trails was proposed,which provides a reference and basis for the construction of the rehabilitation base and the improvement of the theoretical system of the rehabilitation function.The main results are as follows:1.Spatial-temporal distribution characteristics and evaluation of negative ionThe seasonal variation of the concentration of negative ions in recreational trail was summer>autumn>spring>winter.According to the negative ion evaluation,in the spring,except for grassland,the average negative ion concentration of the 10 configuration modes had reached the"V"level and above,and most of the negative ion concentrations in the summer and autumn configuration modes have reached the"IV"level,which benefit human health.The spatial variability of negative ions at 0.5m and 1.5m in the plot was similar.The concentration of negative ions in the area near the stream was higher than that of the small path.The concentration increased from the small radial side of the central recreation,and there was a large spatial variability in the direction of the small path.Among them,the high-value areas of air negative ion concentration in the broad-leaved forest plots were all located near the dense tree area with higher green and near the tree species with larger crown.2.Spatial-temporal distribution characteristics and evaluation of air particulate matterThe variety of TSP,PM₁₀,PM_2.5,PM_1.0 concentration were very similar.The highest TSP concentration was 156.7μg/cm³,and the lowest PM_1.0 was 21.6μg/cm³.At the vertical height,the PM at 0.5m was slightly higher than that at 1.5m,but there was no significant difference.The evaluation results showed that except for coniferousplantations that were"pollution"in spring,PM_2.5 basically reached the"clean"level.In summer,except for the P.densiflora-U.pumila mixed plantation,P.cerasifera-P.bungeana mixed plantations and P.orientalis plantation,configuration mode was"clean"level;except for P.orientalis plantation,PM₁₀ and PM_2.5 season air quality evaluation was"Medium"level,the mass concentration of the other configuration modes were"clean"level,which was suitable for human activities.In autumn,except the mixed grassland and P.orientalis-R.pseudoacacia mixed plantations reached the"pollution"level,TSP mass concentration was"moderate"level;the air quality evaluation of the 11 configuration modes of PM₁₀ and PM_2.5 season was"pollution"level,which can be seen in in spring and autumn,appropriate activities can be carried out in the recreational trails where coniferous forests occupy a relatively large area.In winter,the TSP mass concentration levels of the P.s armandii-R.pseudoacacia mixed plantations and the P.densiflora-A.sibirica mixed plantation were evaluated as"moderate",and the TSP mass concentrations of the other configuration modes were evaluated as"pollution"levels,which was not suitable for activities.3.Spatial-temporal distribution characteristics and evaluation of microclimateThe seasonal variation of temperature was specifically as follows:spring>summer>autumn>winter,the difference was significant（p<0.05）;that of relative humidity was inversely proportional to the temperature,the seasonal variation was significant（p<0.05）;the spring and summer wind speeds were significant higher than autumn and winter（p<0.05）.According to the comfort index evaluation standard,when the comfort index was<6.95,the body feels comfortable.In summer,the comfort index of all configuration modes was under 6.95,which was most suitable for active recreation.Autumn and spring were appropriate rested and played.The comfort index was greater than 6.95 for all configuration modes in winter,and the feeling was"very uncomfortable",which was not suitable for recreation.The analysis of spatial variability showed that the high-low area of the comfort index in the trail had a strong correspondence with the dense arbor-dense area,the community configuration structure and topographic factors were different,and the spatial distribution of the comfort level was different.4.Evaluation of recreational function of recreational trails and its influencing factorsComprehensive analysis showed that in summer C.pinnatifida mixed forest,P.armandii-R.pseudoacacia mixed plantations,P.orientalis-R.pseudoacacia mixed plantations,and P.densiflora-U.pumila mixed plantations had good effects,and they were all suitable for carrying out recreational activities;in spring and autumn it is not suitable for carrying out recreational activities in bamboo plantation,grassland,and Q.acutissima plantation,P.cerasifera-P.bungeana mixed plantations,P.orientalis plantation,the rest of the configuration mode can be properly carried out recreational activities;in winter all configuration models had low evaluation scores,except for C.pinnatifida mixed forest,P.armandii-robinia pseudoacacia mixed plantations,others were not suitable for carrying out recreational activities.RDA results showed that the community structure features had a good correlation with the maintenance factors.The characteristics of community structure and understory vegetation had a strong effect on the maintenance factors,especially tree uniformity and richness had a strong negative effect on negative ions,but herb richness had a strong positive effect on negative ions.5.Rehabilitation function design for recreational trailsBased on the analysis of recreational trails,the spatial-temporal pattern of recreational factors,the entire recreational trail were divided into five functional subdivisions:religious cultural zone,recreational experience zone,waterfront interactive zone,forest walk zone,and mountaineering activity zone.Through the increase or decrease of plant configuration,spatial structure,landscape facilities,color matching,and rehabilitation functions,9 recreational trail plots in each functional area were designed to enhance the maintenance effect.