洪河湿地植被地上生物量遥感反演研究

发布时间：2018-02-26 02:07

本文关键词： 地上生物量相关分析反演模型洪河湿地　出处：《遥感技术与应用》2014年02期 　论文类型：期刊论文

【摘要】：在对洪河湿地植被地上生物量实地采样调查的基础上,利用准同步的TM数据建立了洪河湿地地上生物量遥感反演模型。主要研究了洪河湿地植被地上生物量的空间分布情况,并结合研究区的DEM分析生物量空间分布特征和高程的相关关系。并分析了不同生物量范围内,生物量与高程之间相关性存在差异的原因。研究表明:多元回归模型与其他模型相比拟合精度最高,决定系数为0.813,是洪河湿地地上生物量估算的精度最优模型;经估算得到2007年洪河湿地地上生物量主要集中分布于600~1 200g/m2之间,总生物量为2.4856×108 g,平均生物量为934.7105g/m2。通过生物量与DEM的相关分析得到,在生物量值为0~600g/m2的低生物量分布区域,生物量与高程之间存在较好的相关性,相关系数为0.79839;在生物量为600~1 200g/m2和1 200g/m2以上范围内,生物量与高程值之间相关性较弱。
[Abstract]:Based on the field sampling investigation of aboveground biomass in Honghe wetland, a remote sensing inversion model of aboveground biomass of Honghe wetland was established by using quasi-synchronous TM data. The spatial distribution of aboveground biomass in Honghe wetland was studied. The spatial distribution characteristics of biomass and the correlation between height and spatial distribution of biomass were analyzed by DEM. The research shows that the regression model has the highest fitting accuracy compared with other models, and the determination coefficient is 0.813, which is the best model for estimating the aboveground biomass of Honghe wetland. In 2007, it was estimated that the aboveground biomass of Honghe wetland was mainly distributed in the range of 1 200 g / m ~ 2, the total biomass was 2.4856 脳 10 ~ 8 g / m ~ (2), the average biomass was 934.7105 g / m ~ (2). Through the correlation analysis of biomass and DEM, the low biomass distribution area with a biomass value of 0 ~ 600 g / m ~ 2 was obtained. There was a good correlation between biomass and height, the correlation coefficient was 0.79839, and the correlation between biomass and elevation was weak in the range of 600g / m2 and above 1200 g / m2.
【作者单位】：辽宁工程技术大学;中国科学院东北地理与农业生态研究所;
【基金】：973计划项目(2010CB951304)
【分类号】：TP79

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