Cumulative Impacts of Driving Factors on Desertification in Duolun Country,Inner Mongolia
Cumulative Impacts of Driving Factors on Desertification in Duolun Country,Inner Mongolia
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发表时间：
2007
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通讯作者：
Yang Chi
中科院分区：
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作者：
Yang Chi
以内蒙古多伦县为研究区域，采用滑动平均法和灰色关联分析方法，分析了驱动力对荒漠化的累积影响。结果表明，人类活动对荒漠化的累积影响处于较短的时间尺度，自然活动的累积影响处于中短期尺度，年平均气温的累积影响在第3年达到最大，年平均降水的累积影响在第4年最显著，蒸发量和风速的影响随着时间尺度的增大逐渐增大，在第10年最显著；人口影响第一年最大，耕地面积在一至十年间逐渐减少；粮食产量影响在第五年达到最大；国内生产总值影响在第二年最大；牲畜总数影响在第二年最显著。耕地指数和承载力对荒漠化累积影响的主要原因是人口增加对环境和资源造成的压力增大。
Taking Duolun County,Inner Mongolia as the study area,the paper analyzed the cumulative impact of driving forces to desertification with moving-average method and grey relational analysis method.The results showed that the cumulative impact of human activities on desertification was in relatively short-time scale, and the cumulative impact of natural activities was in middle-short time scale.For details,the accumulative impact of annual mean temperature came to the maximum in the third year,the accumulative impact of annual mean precipitation was the most significant in the fourth year,the impact of evaporation and wind speed was gradually increased with the time scale increasing and was the most significant in the tenth year;the impact of population reached the maximum in the first year,that of the farmland area gradually decreased in the duration of one to ten years;the impact of grain output reached the maximum in the fifth year;the impact of GDP was in the maximum in the second year;the impact of total number of livestock was the most significant in the second year.The principal causes of the cumulative impact of cropland index and carrying capacity on desertification is the increasing pressure on environment and resource due to increasing population.