Download Designing and Conducting a Forest Inventory - case: 9th by Erkki Tomppo, Juha Heikkinen, Helena M. Henttonen, Antti PDF
By Erkki Tomppo, Juha Heikkinen, Helena M. Henttonen, Antti Ihalainen, Matti Katila, Helena Mäkelä, Tarja Tuomainen, Nina Vainikainen
Reliable details on woodland assets and the prestige of forests on the nationwide point is needed for numerous reasons, comparable to making strategic judgements, formulating laws and suggestions for wooded area administration, aimed toward making sure the supply of enough offer of trees for the woodland industries in addition to of their strategic making plans of investments. it's also crucial in making plans wooded area security and for retaining biodiversity. international agreements, similar to the Kyoto Protocol, more and more depend on nationwide wooded area statistics.
National wooded area Inventories in Finland have developed steadily over a interval of 1 hundred years, first with a tribulation stock within the 1910s, and because the Twenties, with operative inventories. The sampling layout and estimation tools were continually revised to correspond with stock strategies and the on hand infrastructure. The content material, in addition to the amassed info and variables hired, are continually tailored to the clients' wishes. Co-operation with the inventories of alternative nations, really with these of the Nordic international locations, has supported those developments.
This booklet demonstrates intimately all levels of the 9th nationwide woodland stock of Finland (1996–2003): the making plans of the sampling layout, measurements, estimation equipment and effects. The stock wisdom collected in the course of nearly 100 years is consolidated within the publication. the aim of the varied examples of effects is to illustrate the variety of the estimates and content material of a countrywide woodland stock. The authors wish that the e-book may also help in designing and accomplishing any huge quarter wooded area stock.
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Additional resources for Designing and Conducting a Forest Inventory - case: 9th National Forest Inventory of Finland
Among those designs fulfilling this criterion, two designs yielded the smallest simulated sampling errors: a cluster with 15 plots in L-form with plot distance of 300 m, and a rectangular-shaped cluster with 13 plots and plot distances of 400 m. The distance between clusters was 7 km in region 4 and 10 km in region 5. The cluster with 15 plots was selected for both regions in order to allocate more time for field measurements. 2d). 2) was employed in North Lapland (sampling density region 6). The proportion of forest land is low, there are large areas without any forest land, the occurrence of forests is patchy, and the road network is sparse.
4 Stem or root damage: damage that was either on the trunks or on the roots not further than 1 m from the stem. , fungi, frost, browsing or harvesting. 5 m from the stump (flow lower than this was recorded with code 4). The length of the visible flows had to be at least 30 cm. 6 Dead or broken tops: the main trunk was broken within the upper half of the living crown and the tree had not yet formed a new top recovering the damage. 7 Other top damage: die-back, deformation or other damage at the top that had not yet developed to damage on the trunks (code 8).
The thickness of the organic layer was measured to the depth of 4 m. 8 Drainage Situation The assessments concerning the drainage situation were made from the point of view of wood production, but these variables also give information about the naturalness of the site and can be used as biodiversity indicators. 12) distinguishes undrained and drained forestry land and classifies drained peatland on the basis of the progress of the drainage effect (the drainage stage). The improvement in hydrology and lowering of the water table to increase timber productivity has been the aim of the forest drainage, and is seen also in the class definitions.