摘要
本文基于HJ-1/CCD遥感影像,以一级土地利用分类的六种地物类型为研究对象,采用面积加权平均的方法对六种分类中耕地、林地、草地的最大光能利用率进行修订,采用CASA模型对北京地区2009年NPP进行估算,结果表明北京地区NPP在7、8月份最高,且分布总趋势为北部高,南部低;西部高,东部低,估算结果与实测值比较接近,相关系数在0.8左。通过本文方法所得估算结果不但合理而且可靠。
In this study,using area weighted average method to revise the maximum energy efficiency with farmland,woodland,grassland in six feature types which classified by land-use-1 map based on HJ-1/CCD remote sensing data.Estimating NPP of Beijing in 2009 with CASA model,and the result shows that the highest NPP of Beijing is appeared in July and August,and the general trend of the distribution is high in northern and west,low in southern and east in Beijing;The estimates values are close to measured values,with correlation coefficient is 0.8.As a result,the method used in this study was reasonable and reliable.
出处
《微计算机信息》
2012年第9期231-233,共3页
Control & Automation
基金
基金申请人:孟庆岩
基金资助项目名称:科技部国际科技合作计划资助
基金颁发部门:国家科技部
基金编号:2010DFA21880
基金申请人:孟庆岩
基金资助项目名称:国家自然科学基金面上项目
基金颁发部门:国家科技部
基金编号:40971227
