Relative Costs and Benefits of a Continuous and a Periodic Forest Inventory in Minnesota
Relative Costs and Benefits of a Continuous and a Periodic Forest Inventory in Minnesota
复制标题
明尼苏达州连续和定期森林清查的相对成本和效益
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
M. Kohl
中科院分区：
文献类型：
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作者：
H. Schreuder;M. Hansen;M. Kohl
我们表明，美国农业部林务局正在开发的年度森林资源清查系统（AFIS），并在明尼苏达州进行测试，是没有更昂贵的定期明尼苏达州森林资源清查（12年的测量周期）。由于除了定期调查的结果外，自动指纹识别系统每四年还可以产生非常有用的结果，因此，持续的盘存将具有成本效益。定期调查在全面调查的头几年内产生更精确的估计数，但之后的年度调查将更精确。精度的变化发生在哪里仍然需要确定。AFIS的这种成本中性优势非常重要，因为USFS已经决定今年使用AFIS等年度库存。
We show that the Annual Forest Inventory System (AFIS) being developed by the USDA Forest Service and tested in the state of Minnesota is no more costly than the periodic Minnesota forest inventory (12 year measurement cycle). Since very useful results could be generated with AFIS every 4 years in addition to the results from the periodic survey, a continuous inventory would be cost effective. Periodic surveys yield more precise estimates within the first few years of the full survey but afterwards the annual survey would be more precise. Where the changeover in precision occurs still needs to be determined. This cost-neutral advantage of AFIS is quite important to note since the USFS has decided to go to annualized inventories such as AFIS this year.