基于Weibull分布的林分结构可视化模拟技术研究

Study on Visual Simulation Technique of Stand Structure Based on Weibull Distribution

林分结构是林分生长和林分经营的理论基础,具有重要的生产实践和科研价值。以杉木人工林为研究对象,以30 m×30 m样地大小为例,以Weibull分布拟合林分直径结构,并进行x2检验。在已知林木算术平均胸径和林木株数的前提下,以C#语言为基础,结合Weibull分布模型、测树因子间关系模型、生物量估计模型、GDI+技术与MOGRE技术,实现了林分结构统计图表可视化模拟,并对林分进行了2维3维可视化模拟。结果表明:Weibull分布可有效拟合林分直径结构分布,可视化模拟技术使林分结构得到了更加直观高效的表达,为研究林分结构提供了新的技术手段,为提高森林经营管理水平提供了可视化决策平台。

Stand structure is the theoretical basis of stand growth and management, and has significant practical and scientific values. The plot of Chinese fir plantation with the size of 30 m × 30 m was taken as an example. The diameter distribution of stand was fitted by Weibull distribution, and the resuh was analyzed by using chi - squared test. The stand arithmetic average DBH and the tree number of the stand were determined, and then the Chinese fir stand structure was intuitively simulated by using the Weibull distribution model, the relation- ship models of the forest inventory factors, the biomass estimation model, the GDI ＋ technique and the MOGRE technique based on the C# programming language. The results were shown by the statistical charts, 2D and 3D views. The results showed that the diameter distribution of stand could be effectively fitted by the Weibull dis- tribution model, and stand structure could be expressed in a more intuitive and more effective way by using the visual simulation technique. It not only can provide the study of stand structure with a new technical measure, but also can offer a straightforward and efficient decision-making platform for enhancing the level of forest man- agement.