广东省河源市森林资源动态变化分析

Dynamic Changes Analysis of Forest Resource in Heyuan

采用遥感与地理信息技术相结合的方法研究了广东省河源市在时间和空间两方面的森林资源动态变化。时间上,1985-2004年近20年的变化结果表明,林业用地面积减少761.1×103hm2;有林地面积减少171.2×103hm2;森林覆盖率提高31.7个百分点;无林地面积减少600.9×103hm2;森林蓄积量增加2708.4×104m3;消耗量小于生长量。同时力求找到动态变化的原因,并预测其发展方向。空间上,有林地主要分布在河源市的北部和邻近边界山地地区,灌木林与疏林地分布在中部地区,无林地主要集中在城区中心地带。

The paper aimed to study dynamic changes of forest resources based on RS and GIS at time and space aspects. From 1985 to 2004, the changes of nearly 20 years showed that forest land and afforested land areas had decreased 761.1 × 10^3 hm^2 and 171.2 × 10^3 hm^2 respectively; forest coverage rates had increased 31.7% ; non-forest land areas has decreased 600.9 × 10^3 hm^2 ; forest stock volume had grown 2 708.4 × 10^4 hm^3 ; consumption was less than growth. At the same time the paper tried to find the reasons of dynamic changes, and predicated the development direction. In space, afforested land had been distributed on the north part of Heyuan and neighboring boundary mountain area, shrub and sparse forest land had been distributed on middle area, non-forest land had been concentrated on urban heartland.