Double sampling for stratification in periodic inventories-Infinite population approach

被引:22
作者
Saborowski, Joachim [1 ,2 ]
Marx, Almuth
Nagel, Juergen [3 ]
Boeckmann, Thomas [4 ]
机构
[1] Univ Gottingen, Dept Ecoinformat Biometr & Forest Growth, D-37077 Gottingen, Germany
[2] Univ Gottingen, Dept Ecosyst Modelling, D-37077 Gottingen, Germany
[3] NW German Forest Res Stn, D-37079 Gottingen, Germany
[4] Lower Saxony Forest Planning Off, D-38302 Wolfenbuttel, Germany
关键词
Continuous forest inventory; Two-phase sampling for stratification; Infinite population approach; Multi-purpose optimization;
D O I
10.1016/j.foreco.2010.08.035
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Double sampling for stratification is a sampling design that is widely used for forest and other resource inventories in forest ecosystems. It is shown that this sampling design can be adapted to repeated inventories including estimators of net change, even for non-proportional allocation of second-phase units and periodically updated stratification. The method accounts for the transition of sampling units among strata. Moreover, it may outperform classical single phase designs if sample plots are appropriately allocated to strata with respect to predefined target variables, here: volume per ha of bigger trees of the main tree species. The latter requires a clear definition of predominant aims of the inventory and an appropriate optimization method. Access to inventory data of a state forest district from two occasions allowed for an optimization of the design based on the first occasion, which proved to be still advantageous on the following occasion. Estimators are developed under the infinite population approach, which is generally deemed more appropriate for forest inventories. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:1886 / 1895
页数:10
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