%0 Research article
%T Multi-source inventory of the forests of the Hebei Forestry Bureau, Heilongjiang, China
%A Tomppo, Erkki
%A Korhonen, Kari T.
%A Heikkinen, Juha
%A Yli-Kojola, Hannu
%D 2001
%J Silva Fennica
%V 35
%N 3
%R doi:10.14214/sf.587
%U https://silvafennica.fi/article/587
%X A multi-source forest inventory method is applied to the estimation of  forest resources in the area of the Hebei Forest Bureau in Heilongjiang  province in North-East China. A stratified systematic cluster sampling  design was utilised in field measurements. The design was constructed on  the basis of information from earlier stand-level inventories, aerial  orthophotographs, experiences from other sampling inventories and the  available budget. Sample tree volumes were estimated by means of  existing models. New models were constructed and their parameters  estimated for tallied tree volumes and volume increments. The estimates  for the area of the Bureau were computed from field measurements, and  for the areas of the forest farms estimated from field measurements and  satellite images. A k-nearest neighbour method was utilised. This method  employing satellite image data makes it possible to estimate all  variables, particularly for smaller areas than that possible using field  measurements only. The methods presented, or their modifications, could  also be applied to the planning and realisation of forest inventories  elsewhere in Temperate or Boreal zones. The inventory in question gave  an estimate of 114 m3/ha (the multi-source inventory 119 m3/ha) instead  of 72 m3/ha as previously estimated from available information. Totally  nineteen tree species, genera of species or tree species groups were  identified (Appendix 1). The forests were relatively young, 60% of them  younger than 40 years and 85% younger than 60 years.