杭州西湖风景区植被碳储量估算及空间特征分析  

Estimation of Vegetation Carbon Storage and Analysis of Spatial Characteristics in West Lake Scenic Area,Hangzhou

作　　者：郑田瑜 肖凤虎 章银柯[3] 王宇[1] 郭婷婷[1] 邵锋[1] ZHENG Tianyu;XIAO Fenghu;ZHANG Yinke;WANG Yu;GUO Tingting;SHAO Feng(Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Xinchang County Natural Resources and Planning Bureau,Shaoxing 312500,Zhejiang,China;Hangzhou Botanical Garden,Hangzhou 310012,Zhejiang,China)

机构地区：[1]浙江农林大学,浙江杭州311300 [2]新昌县自然资源和规划局,浙江绍兴312500 [3]杭州植物园,浙江杭州310012

出　　处：《西北林学院学报》2025年第1期244-251,262,共9页Journal of Northwest Forestry University

基　　金：杭州西湖风景名胜区科技发展计划项目(2022-001)。

摘　　要：准确估算杭州西湖风景区森林植被碳储量,为评估城市森林植被碳汇价值提供科学依据。本研究以Sentinel-2A影像为数据源,提取单波段因子、植被指数因子、主成分分析因子、纹理特征因子和地形因子等相关特征因子,结合样地调查数据,采用多元逐步回归的方法,构建研究区森林植被碳储量反演模型,估算植被地上碳储量,总结和分析碳密度空间分布特征。结果表明:1)样地植被碳密度在累积频率上符合正态分布规律,可进行线性回归分析,构建的模型R^(2)为0.716,RMSE为18.03 t/hm^(2)。模型满足精度要求,预测结果可靠。2)西湖风景区森林植被碳储量为275632.82 t,植被碳密度主要集中在25.00~125.00 t/hm^(2),植被平均碳密度为65.50 t/hm^(2)。碳密度较高区域集中在西湖附近,整体分布呈现四周高、中间低的特征。3)森林植被碳密度随海拔升高而减小,随坡度增大而降低。阴坡(77.86±23.02)t/hm^(2)和半阴坡(73.02±21.86)t/hm^(2)碳密度高于半阳坡(68.10±21.47)t/hm^(2)和阳坡(67.84±21.28)t/hm^(2)。研究结果可为评估杭州西湖风景区森林植被碳汇能力、开展森林健康评价提供理论参考。The objective of this study was to accurately estimate the carbon stock of forest vegetation in the West Lake Scenic Area of Hangzhou,to provide a scientific basis for evaluating the carbon sequestration value of urban forest vegetation.Taking the images from Sentinel-2A as the data sources,various relevant feature factors were extracted,including single-band,vegetation index,principal component analysis,texture,and terrain factors.Combining with field survey data,a multivariate stepwise regression method was employed to construct a model for inverting the vegetation carbon storage in the study area,estimating the aboveground carbon storage of vegetation,and summarizing and analyzing the spatial distribution characteristics of carbon density.The results showed that 1)the carbon density of vegetation in sample plots followed a normal distribution on cumulative frequency,allowing for linear regression analysis.The constructed model achieved an R^(2) of 0.716,with RMSE of 18.03 t/hm^(2),meeting the accuracy requirements and providing reliable prediction results.2)The carbon storage of forest vegetation in the West Lake Scenic Area was 275632.82 t,the carbon density of vegetation was mainly concentrated in 25.00-125.00 t/hm^(2),with an average carbon density of 65.50 t/hm^(2).The area with higher carbon density was concentrated near the West Lake,and the overall distribution showed a characteristics of high around and low in the middle.3)The carbon density of the forest vegetation decreased with the increase of elevation and slope.The carbon densities of shady slope(77.86±23.02)t/hm^(2)and semi-shady slope(73.02±21.86)t/hm^(2)were higher than those of semi-sunny slope(68.10±21.47)t/hm^(2)and sunny slope(67.84±21.28)t/hm^(2).These research findings serve as theoretical references for assessing the carbon sequestration capacity and conducting health assessments of forest ecosystems in the West Lake Scenic Area.

关 键 词：西湖风景区 Sentinel-2A 森林植被 碳储量 空间分布 

分 类 号：S718.55[农业科学—林学]