宁夏生物质能的遥感估算

利用MODIS的MOD17A3数据获取宁夏植被NPP分布,根据宁夏植被生长发育节律利用MODIS NDVI数据提取宁夏土地利用类型,将两者叠加并进行计算获得宁夏生物量的分布。结果表明,2007年宁夏生物质能为1.259 7×108MJ,在空间分布上来看固原市生物质能最丰富,石嘴山市最少。遥感方法计算结果与统计方法获得的结果误差在8%,说明遥感方法估算生物质能准确性较高、空间分布清晰,笔者所选的参数是适当的,可为其他地区生物质能的遥感估算提供参考。

Estimation of Ningxia Bioenergy Using Remote Sensing

NPP distribution was obtained by MOD17A3.According to the growth rules of plants in Ningxia,the land utilization types were gained by MODIS NDVI data.By adding these two,the distribution of the biomass in Ningxia was calculated.Results suggested that the error of biomass in Ningxia in 2007 was about 1.259 7 ×108 MJ.From the angle of spatial distribution,the biology energy in Ningxia was rich,and the one in Shizuishan City was the least.The result of remote sensing and the statistics were about 8%,which suggested that the remote sensing method to calculate the preciseness of biomass was high and the spatial distribution was clear.The selected parameter was appropriate,which provided reference for the remote sensing calculation of biology in other places.