敦煌近30年荒漠化影响因素分析-国家生态系统观测研究网络.PDF

第35 卷第3 期 甘肃林业科技 Vol.35 No.3 2010 年9 月 Journal of Gansu Forestry Science and Technology Sep. 2010 第3 期 文章编号：1006-0960 （2010）03-0021-05 敦煌市近30 年荒漠化影响因素分析 唐卫东，李得禄，赵 明，康才周 （甘肃民勤荒漠草地生态系统国家野外科学观测研究站/甘肃省治沙研究所，甘肃武威733000） 摘要：应用主成分分析法对敦煌市荒漠化影响因素进行了分析，以年末总人口、耕地面积、粮食产量、造林 面积、经济作物面积、农村用电量、上游来水量、年均降水量、平均气温、平均风速、人均收入、工业总产值等12 个指标的多年数据进行分析，研究了各个指标之间的内在关系以及各类指标对敦煌荒漠化的影响程度。结果 表明：敦煌地区的现代荒漠化是一个以人为因素作用为主的的综合过程，其中人为因素对敦煌荒漠化起决定 作用，自然因素的影响相对较小。 关键词：敦煌市；荒漠化；影响因素；因子分析 中图分类号：Q 16 文献标识码：A doi ：10.3969/j.issn. 1006-0960.2010.03.005 Analysis on Influencing Factors of Desertification in Dunhuang City TANG Wei-dong, LI De-lu, ZHAO Ming, KANG Cai-zhou (Minqin National Studies Station for Desert Steppe Ecosystem Gansu Desert Control Research Institute, Wuwei 733000 Gansu) Abstract: In this paper, influencing factors of desertification in Dunhuang city were analyzed using principal component analysis, the total population at the end of year, cultivated area, grain output, afforestation area, the number of motor-pumped wells, wheat yield, rural electricity, upper stream inflow, annual precipitation, average temperature, average wind speed, the per capita income and industrial output value were determined, the intrinsic relationship be- tween the various indicators and the impact degree of various indicators desertification in Dunhuang region. The results showed that the factors of modern desertification of Dunhuang region are a comprehensive process, including human factor and natural factor. Human factor was the main factor of desertification of Dunhuang region, and natural factor was rela-tively small. Key words: Dunhuang city; desertification; influencing factor; factor analysis 荒漠化是指包括气候变异和人类活动在内的种 漠化形成的原因，以寻求最佳治理途径。荒漠化