摘要
通过对民勤县荒漠化影响因素的考察,以年末农村人口、耕地面积、粮食产量、造林面积、机电井眼数、小麦单产量、农村用电量、地下水矿化度、上游来水量、沙尘天数、降水量11个指标的逐年变化数据,利用因子分析法对各影响因素的内在结构及各类因子对荒漠化进程的影响程度进行了分析。结果表明,1989—2003年间,该县荒漠化发展进程中人为因素占82%,自然因素占18%。
Based on survey to influencing factors of desertification in Minqin county of Gansu province, the following eleven indexes are determined, they are rural population, cultivated area, grain output, forestation area, amount of electromechanical well, wheat yield, rural power consumption, groundwater mineralization degree, inflow from upper river, sand-dust storm days, and annual precipitation. The inner structure of each factor and its effect on desertification process are analyzed by method of factor analysis. The result showed that the contribution of anthropogenic factor to desertification is 82 %, and that of the natural is 18 %.
出处
《中国沙漠》
CSCD
北大核心
2008年第1期35-38,共4页
Journal of Desert Research
基金
甘肃省自然科学基金项目(甘肃河西走廊荒漠化防治机理研究)资助
关键词
民勤
荒漠化
影响因素
因子分析
Minqin County
desertification
influencing factor
factor analysis
