摘要
为了优化我国的森林资源监测体系,以北京市延庆县为估测对象,利用美国森林资源清查方法(3阶抽样方法),在部分改进的基础上,通过设置正六边形抽样框架及群团样地,估测延庆县的森林面积。结果表明:估算出北京市延庆县的森林总面积为1 202.739 km^2,与延庆县政府报告的森林总面积对比,总体精度达到94.22%。分层随机抽样和分层双重抽样下的估计精度分别为99.96%和99.94%,这种面积估测方法具有较好的总体精度和稳定性。
We adopted the national forest inventory system of the USA （three-stage sampling） to optimize the national forest in- ventory system of China in Yanqing County of Beijing. According to some parts of the improvement, layout hexagonal sam- pling framework and circle sample area in Yanqing County of Beijing were developed. The total forest area of Yanqing County was 1 202.739 km^2. Compared with the reported forest area, the overall accuracy was 94.22%. The prediction accuracies were 99.96% and 99.94% by using stratified sampling and stratified double sampling, respectively.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2016年第9期5-8,28,共5页
Journal of Northeast Forestry University
基金
国家林业局"948"项目(2015-4-32)
关键词
森林资源综合监测
抽样框架
森林总面积估计
总体精度
估计精度
Forest resources comprehensive monitoring
Sampling frame
Forestland area estimation
Overall accuracy
Prediction accuracy
