黄土高原地区人类活动强度时空变化分析

发布时间：2018-09-14 21:05

【摘要】：在采用建设用地当量面积占区域土地总面积百分比法计算黄土高原地区各县级单元人类活动强度基础上,从总体变化、类型时空分异、地域单元变化及空间自相关性四方面分析人类活动强度时空变化特征。结果表明:1992年黄土高原地区人类活动强度为12.48%,2000年达到14.49%,2008年仅上升至14.81%,2000年以前增长相对较快,2000年以后增长明显放缓;人类活动强度空间分布格局呈现出西北低、东南高的特点,二者之间的区域则随时间发生一定变化,呈现出较低、中等、较低与中等类型交错分布的变化趋势;除黄土丘陵地区人类活动强度较低、低类型大幅度转化为中等类型外,其他五大地域单元空间分布格局变化不大;人类活动强度具有显著的空间集聚(正相关)特征,高值集聚区主要分布于黄土高原地区东南部的汾渭谷地和豫西北盆地区,低值集聚区大片集中于西北半壁的鄂尔多斯风沙区、黄土丘陵地区以及青东高原山地丘陵区。
[Abstract]:On the basis of calculating the human activity intensity of each county unit in the Loess Plateau by using the percentage of the construction land equivalent area to the regional land total area, the total change, the temporal and spatial differentiation of the type of the human activity are discussed. The spatial and temporal variation characteristics of human activity intensity are analyzed in four aspects: regional unit change and spatial autocorrelation. The results show that the intensity of human activities in the Loess Plateau was 12.48 in 1992, and reached 14.4949 in 2000, only increased to 14.81 in 2008, increased relatively rapidly before 2000, slowed down obviously after 2000, and the spatial distribution pattern of human activity intensity showed the characteristics of low in the northwest and high in the southeast. The region between the two changes with time, showing a trend of low, medium, low and medium types of staggered distribution, except for the low intensity of human activity in the loess hilly region, the low type of human activity is transformed into the medium type by a large margin. The spatial distribution pattern of the other five regional units has little change, and the intensity of human activities has significant spatial agglomeration (positive correlation) characteristics, and the high value concentration areas are mainly distributed in the Fen-Wei valley in the southeast of the Loess Plateau and the basin in the northwest of Henan Province. A large area of low value concentration area is concentrated in Ordos sandstorm area, loess hilly area and mountainous hilly area of the eastern Qinghai Plateau.
【作者单位】：中国科学院地理科学与资源研究所;中国科学院大学;
【基金】：国家自然科学基金项目(41171449)
【分类号】：C912.8

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