基于ArcGis的河北省柞树面积和蓄积量空间分布规律

Spatial Distribution Law of Acreage and Volume of Quercus mongolica in Hebei Province Based on ArcGis

为掌握河北省柞树分布规律,以河北省森林资源调查数据为依据,基于ArcGis分析了河北省11个地级市、不同林种、龄组、土壤类型的柞树面积和蓄积量空间分布特征及其与地形因子的关系。结果表明:(1)河北省柞树总面积82.706 1万hm^(-2),总蓄积量2 349.103 7万m^(3),单位蓄积量28.403 0 m^(3)·hm^(-2),主要分布于承德地区(面积占比66.78%)。(2)棕壤土上分布面积比例最大(59.73%),其次是褐土(34.09%)。(3)幼龄林面积比例最大(94.45%),其次是中龄林(5.07%),表明柞树整体年龄偏小。(4)柞树主要分布在坡度26°~35°、海拔400~1 200 m的阴坡和半阴坡。

In order to grasp the distribution law of Quercus mongolica in Hebei Province, based on survey data of the forest resources in Hebei Province and ArcGis, this paper analyzed spatial distribution characteristics of area and volume of Quercus mongolicaof eleven cities in Hebei province, the different forest category, age group, agrotype and its relationship with topographic factors.The results showed as the following four parts.(1) The total area of Quercus mongolica in Hebei Province was 827.061 thousands hm^(-2), the totalvolume was 23491.037 thousand m^(3), the unit volume was 28.4030 m^(3)· hm^(-2), which was mainly distributed in Chengde area and accounted for 66.78%.(2) The largest proportion of area distribution on brown soil was 59.73%, the second one on the cinnamon soil was 34.09%.(3) The young forest population had the largest proportion of the forest area up to 94.45%,the second was mid-maturation forestwhich accounted for 5.07%. It showed the overall age of Quercus mongolicawas small.(4)Quercus mongolicawas mainly distributed in gradient 26°-35°,at the cloudy slope and half cloudy slope area of 400-1 200 m altituderange.