最小方差法在森林经营区划中的应用研究

Forest management division research using the minimum variance method

森林经营区划是对森林经营具体措施的划分,区划时所要考虑的因素较多,区划过程以人为的判断及定性分析为主。为更好地开展森林经营区划,客观地将具有相似性的区域划分归类,以龙泉市为主要研究对象,以海拔、坡度数据为基础,参照在土地利用结构类型分类区划中使用的最小方差法,计算归并出2个森林类型分布体系,并将2个分布体系与当地实际森林经营管理分区方案进行对比分析。结果表明,以海拔、坡度等客观的量化数据为基础,利用最小方差法计算形成的不同归类区域,可作为森林经营区划分的重要分析因子,指导森林经营区划工作。结果与实际的合理区划吻合度较高,最终得出该分布体系可作为森林经营分区重要依据的结论。

The forest management division uses concrete measures,such as subjective judgment and qualitative analysis,for forest management.To classify similar areas objectively,Longquan was used with the minimum variance method,which had been tested there for structural land classification,to calculate two forest management distribution systems： one using elevation data and the other slope data.Comparing the two distribution systems with the actual local forest management plans showed a strong goodness of fit based on elevation and slope.Thus,the two systems could be used as an important basis for forest management,and the minimum variance method could be used as an important analysis factor,based on quantitative data such as elevation and slope,to guide the forest management division.