开展国家和地方森林资源一体化调查监测,将各省森林储量数据分解落实到市、县、乡各级乃至每一个森林图斑,是推进各级林长制督查考核的必然要求。基于近年北京市森林资源调查监测的数据资料,以全市森林储量为总体控制数,利用蓄积量估测模型及三储量(蓄积量、生物量、碳储量)联立模型,将储量数据落实到图斑;在有森林资源规划设计调查数据可参考的前提下,可统筹考虑不同数据的误差,采用联合估计的方法,对市、县级数据进行适当调整。通过建立北京市的森林蓄积量估测模型和三储量联立模型,将2021年全市的森林蓄积量、生物量和碳储量全部分解落实到区级、乡级和每一个森林图斑,实现了市、区、乡3级储量数据的一体化。结果表明:研究提出的应用模型技术将森林三储量分解落实到图斑的做法,在实践中是可行的。

It is necessary to conduct national and local integrated forest resources inventory and monitoring,and implement decomposition of provincial forest stock data to prefecture,county,and township level,and even every forest stand polygon,for promoting the supervision and assessment of forest chief system at all levels.Based on the data of forest resources inventory and monitoring in recent years in Beijing,the procedure for implementing decomposition of forest stock data into all stand polygons was presented,where the amount of municipal forest stock was taken as the total for control,and forest volume prediction model and simultaneous models of three forest stocks (volume stock,biomass stock and carbon stock)were applied.Given the data of forest resources planning and designing inventory for reference,the joint estimation method could be adopted to adjust the data of prefecture and county level appropriately,while the errors of different data need to be considered as a whole.Through the establishment of forest volume prediction model and simultaneous models of three forest stocks in Beijing,the forest volume,biomass and carbon storage of Beijing in 2021 were decomposed to district,and township level and every forest stand polygon,realizing the integration of stock data at municipality,district and township level.It is showed that the method of applying modeling technology to decompose three forest stocks into forest stand polygons presented in this study is feasible in practice.