Research On Canopy Interception Of Typical Arbors Of Linpan In Western Sichuan

As a compound rural settlement form that integrates ecology,production and life in the west Sichuan plain,Linpan perform historical and realistic values.However,with the development of the integration of urban and rural areas,a large number of Linpan disappeared,the distinctive local landscape is facing a severe challenge.Through the study of Linpan arbors,this paper is mainly about canopy interception of rainfall,which help us to evaluate quantitatively the hydrological ecological value of the rain regulating and richen the achievements of western Sichuan Linpan study from a perspective.In this way,the traditional landscape of Linpan can be protected better and developed sustainably.By collecting rainfall interception data of 17 pure forests of 11 species of arbors of 10 Linpan in Sandaoyan Town,Pidu District,Chengdu,Sichuan Province,the characteristics of rainfall distribution of canopy and the differences in different rainfall and forest types was realized.The stemflow,through rainfall,and canopy interception of 11 species of arbors were compared.At the same time,the research shows that the influence between the gross rainfall,rainfall intensity,rainfall duration,the index of leaf area of forests and stemflow,throughfall,canopy interception by correlation analysis and regression analysis.Divided into evergreen broad-leaved forest,deciduous broad-leaved forest,and deciduous coniferous forest,a comparative analysis was made on the stemflow,throughfall,canopy interception.Through the analysis and comparison of the research data,it can be seen that the seasonal differences in the values and ranges of stemflow,throughfall,and canopy interception are obvious,while the seasonal differences in canopy interception rates are small.Meanwhile,the stemflow of each season is less than the throughfall,and they are greatly affected by the light rain and moderate rain rainfall changes,with the light rain and heavy rain changing slightly.At the level of light rain,the four seasons differences of stemflow rate,throughfall rate,and canopy interception rate are the most obvious.At the level of moderate rain,the stemflow rate,throughfall rate,and canopy interception rate of the four seasons have little difference.The canopy interception rate of the evergreen type is always higher than the deciduous type,and the coniferous forest shows the highest interception rate in spring,summer and autumn.It was also shown that each kind of arbor performs great interception benefits with the interception rate varying from 8.04% to 40.85%.The differences in stemflow,throughfall,and canopy interception among different arbors are significant.The arbor of Cinnamomum japonicum shows the highest interception rate and the arbor of Camptotheca acuminate the lowest rate.The stem flow and throughfall of all arbors are linearly and positively correlated with the gross rainfall.The stemflow and throughfall of most arbors are linearly and positively correlated with rainfall intensity,and have nothing to do with rainfall duration.The relationship between canopy interception and rainfall characteristics of all arbors is quite different.There are linear correlation,curve correlation or no correlation.And there is no linear correlation between throughfall,canopy interception and the index of leaf area for each arbor forest.According to the comprehensive comparative analysis of stemflow,throughfall and canopy interception of three plant types,the average rate of the stem flow and the throughfall are ranked as deciduous broad-leaved forest> evergreen broad-leaved forest> deciduous coniferous forest,the average rate of the canopy interception is as follows: deciduous coniferous forest> evergreen broad-leaved forest> deciduous broad-leaved forest.