科研之友
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摘要
Logging residue is currently one of the largest underutilized residues potentially available for biomass energy production. The cost of collection, processing, and transporting this material is high in proportion to its value; the result is that there are potentially small profit margins. Therefore, managers must develop and execute efficient supply chains. The first step in developing an efficient supply chain requires a reliable estimate of pile volume because this will allow the manager to deploy the appropriately sized transportation and processing operations. This article compares two methods used to measure logging residue piles to terrestrial light detection and ranging (LiDAR)-generated estimates; one uses a geometric base and the other uses a laser rangefinder. The geometric method, which has been used since the 1980s, derives volume by first ocularly estimating the simplified geometric shape of the pile. The second step measures the parameters to compute the volume of that shape. The other method uses a laser rangefinder with an electronic compass that collects coordinates of the pile and then computes a volume. A LiDAR estimate was used as a control and both methods were compared to the LiDAR-generated results for 33 piles in western Oregon. The laser rangefinder produced results that were closer to the LiDAR-generated estimates than the geometric shapes, which showed larger deviations from the LiDAR-generated estimate for larger piles. We believe that the consistency of the laser rangefinder along with its improved reliability makes it the superior method for estimating volume of biomass stored in piles.
- 出版日期2014-2
