基于Landsat影像的梭磨乡冷杉林地上碳储量估测及其时空动态变化

发布时间：2018-08-05 19:03

【摘要】：本研究以四川省马尔康县梭磨乡冷杉林为研究对象,利用遥感技术方法,依据2010年森林资源二类调查小班数据和当年Landsat遥感影像数据,分别提取遥感波段因子、植被生长因子和地学因子等与森林生物量密切相关的指标信息。采用逐步线性回归拟合方法,构建地面冷杉林碳储量和遥感因子的多元线性回归模型。对所建模型进行预测值和实测值的精度检验,若精度达不到研究精度需求,则返回重新建模,直到精度达标。若精度符合研究需求,则以此2010年冷杉林地上碳储量模型为依据,使用基于伪不变特征原理的相对辐射校正法,校正模型,使其可以合理的推广应用到其它四期数据的生物量估算中去。然后,利用上述构建的冷杉林地上碳储量估测模型,再分别针对1995年、2000年、2005年、2010年和2015年研究区冷杉林地上碳储量进行估测,从而揭示出近20年来马尔康县梭磨乡冷杉林地上碳储量的时空动态变化特征。结论如下:(1)梭磨乡冷杉林地上碳储量的空间分布特征表现为:在水平方向上,碳储量整体依托梭磨河流域,东西贯穿梭磨乡全境并向南北延伸,呈树枝状分布。(2)梭磨乡冷杉林地上碳储量的时间变化特征表现为:1995-2015年,梭磨乡冷杉林地上碳储量总量和碳密度在时间上呈持续增长的特征,与四川省以及全国森林碳储量多年变化趋势一致。(3)研究结果表明:1995-2015年间,研究区冷杉林地上碳储量总量和碳密度呈持续上升趋势,碳汇作用显著,森林碳储量结构处于良性发展阶段,其所蕴藏的经济效益和生态价值巨大。
[Abstract]:In this study, the forest of Abies fir in Somo Township, Malkang County, Sichuan Province was used as the research object. The remote sensing band factor was extracted by using the remote sensing technology method, according to the small-class data of forest resources investigation in 2010 and the Landsat remote sensing image data of that year. Vegetation growth factors and geoscientific factors are closely related to forest biomass. A multivariate linear regression model of carbon storage and remote sensing factors of fir forest was established by stepwise linear regression fitting method. If the precision of the model is not up to the requirement of the research precision, the model will be remodeled until the precision is up to the standard. If the precision meets the needs of the research, based on the carbon storage model of fir woodland in 2010, the relative radiation correction method based on the principle of pseudo-invariant features is used to correct the model. It can be popularized and applied to the biomass estimation of the other four periods. Then, using the carbon storage estimation model of fir forest, the carbon storage of fir woodland in 1995, 2000, 2005, 2010 and 2015 were estimated, and the carbon storage of fir forest was estimated in 1995, 2000, 2005, 2010 and 2015, respectively. The temporal and spatial dynamic characteristics of carbon storage on Abies fir woodland in Somo Township of Malkang County were revealed in the last 20 years. The conclusions are as follows: (1) the spatial distribution characteristics of carbon storage on Abies fir forest in Somo Township are as follows: in the horizontal direction, the carbon storage depends on the Suomo River basin as a whole, and extends from east to west through the whole territory of Somo Township and to the north and south. (2) the time variation characteristics of carbon storage on Abies fir forest in Sumo Township were as follows: (1) from 1995 to 2015, the total carbon storage and carbon density of Abies fir forest in Sumo Township showed a sustained increase in time. The results showed that the total carbon storage and carbon density of fir forest in the study area showed an increasing trend from 1995 to 2015, and the effect of carbon sink was significant. The structure of forest carbon storage is in the benign development stage, and its economic benefit and ecological value are enormous.
【学位授予单位】：四川师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S718.5

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