高分辨率遥感影像GeoEye-1在黑河下游柽柳生物量估算中的应用

The Application of High Resolution Satellite Imagery GeoEye-1 on the Biomass Estimation of Tamarix Ramosissima in Lower Reaches of Heihe River Basin

以黑河下游绿洲柽柳为研究对象,利用高分辨率遥感影像GeoEye-1柽柳分类结果,基于典型样点生物学特性调查与生物量试验,建立柽柳冠幅面积与生物量关系模型,计算研究区柽柳地上部分的生物量,分析黑河0～2、2～5、5～10与10～15km不同缓冲带柽柳生物量空间分布规律。结果显示:研究区柽柳总生物量为4.10×105 t,其中:0～2、2～5、5～10与10～15km缓冲带内柽柳生物量分别为2.34×105、1.07×105、6.35×104和5.17×103 t。河流距离对柽柳生物量影响显著,单位面积柽柳生物量随着与河流距离的增加而减少,二者相关系数为-0.97。

The research object of this paper is Tamarix ramosissima,which are the vegetation dominant species in lower reaches of Heihe river basin.Ecology,Geobotany,Statistics theories and remote sense technology were applied.The spatial distributions of Tamarix ramosissima was obtained from high resolution satellite imagery GeoEye-1.Biological characteristics of typical samples survey and biomass test of Tamarix ramosissima were made.Then the model of Tamarix ramosissima canopy area with biomass was built.The over ground part biomass of Tamarix ramosissima was estimated.Finally,the spatial distribution patterns of biomass in the different buffer zones of 0~2,2~5,5~10 and 10~15 km was analyzed.The results showed：The total biomass of Tamarix ramosissima is 4.10×105 t.The biomass of 0~2,2~5,5~10 and 10~15 km buffer zones were 2.34×105,1.07×105,6.35×104 and 5.17×103 t separately.The distance to river has significant effect on biomass of Tamarix ramosissima.The biomass of unit area increases with the distance reduced.The correlation coefficient of them is-0.97.