基于LandSat8 OLI数据的山区NPP遥感估算模型研究

Study on NPP Remote Sensing Estimation Model Based on Data of LandSat8 OLI in Mountainous Area

指出了地形起伏对净初级生产力NPP的估算影响重大,提出了一种山区NPP快速简便的估算方法。以青海省尖扎县为实验区,利用LandSat8OLI数据获取的NDVI与实测NPP进行了回归分析,构建了以NDVI为驱动因子的NPP遥感估算模型:NPP=-349.03ln(1-NDVI)-33.336,R2=0.7325。通过检验,该模型能够运用于地形起伏较大区域的NPP估算,其方法简便快捷,能节约不少人力物力。

As the mountain area accounts for about 66.7 % of the total areaof China, topography has great influence on the NPP estimation. This article proposes a fast and easy method for NPP estimation inmountainous regions. Tak- ing Jianzha county of Qinghai Province as an experimental plot, a NPP estimation model driven by NDVI is built up based on the regression analysis ofreal-time measured NPP and NDVI acquired from LandSat8 OLI data.. NPP= - 349. 031n（1-NDVI）-33. 336, R2= 0. 7325. Through testing, the model can be applied to estimate NPP in the top- ographic relief region. The method is sirnole nnrt efficient.which can save a lot of manpower and material resources.