摘要
利用RS与GIS技术对新疆境内的森林资源进行调查分析,以新疆全区为控制总体,采取卫星数据解译结合现地调查及抽样方法获取全疆森林资源数据。在GIS支持下,对1996、2001年两期卫星遥感调查数据进行对比。研究了新疆各类森林资源的动态变化。近五年森林资源变化的总趋势是林业用地、有林地、疏林地、苗圃、宜林地面积均有增加,森林覆盖率提高,活立木总蓄积量增加,实现了森林资源面积和蓄积双增长。全疆有林地面积由17331km2增加到17837km2,年均增加101km2。森林覆盖率由原来的1.05%上升到现在的1.08%,提高了0.03%。全疆活立木总蓄积由262416000m3增加到289985200m3,共增加27569200m3,年均增加5514000m3,年均净增率为2.00%。分析结果表明;新疆森林资源总体呈上升趋势。但仍存在着天然林稀少、森林覆盖率低、林分年龄结构失调、树种单一等问题。
The variation and evaluation of Xinjiang forest resources were st ud ied based on RS and GIS. The forest resources data in Xinjiang were obtaine d by using sampling method and by satellite image analysis with ground inv estigations. Based on GIS, the variation of Xinjiang forest resources from 19 96 to 2001 was studied. As a result, the five-year variation of fores t resources in Xinjiang is that not only the forestland, woodland, th in stocked land, seed plot, and proper woodland extended, but the for est cover rate and growing stock also increased. The region's woodland increased from 17,331 km 2 to 17,837 km 2 , forest cover rate extended from 1.05% to 1.08%, growing stock increas ed totally from 2.62×10 8 m 3 in 1996 to 2.90×10 8 m 3 in 2001, a year-on-year increase of 551.40×10 4 m 3 . Per ha growing stock increased from 141.198 m 3 in 1996 to 147.703 m 3 in 2001, an increase of 6.505 m 3 . According to analysis in this paper, Xinjiang forest resources trend to increase generally, but the problem is that natural forests are sparse, forest cover rate is low, wood age structure is imbalanced. A t present and in a certain period of time in the future, efforts should be made to natural forest protection projects, forest management according to c lassification and regional desertification control in Xinjiang's forestry.
出处
《地理学报》
EI
CSCD
北大核心
2003年第1期133-138,共6页
Acta Geographica Sinica
基金
国家自然科学基金项目(00013989)~~
