| 近300年来黄土高原耕地变化及时空格局分析 |
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| 引用本文： | 田义超,李晶,任志远. 近300年来黄土高原耕地变化及时空格局分析[J]. 干旱区资源与环境, 2012, 0(2): 94-101 |
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| 作者姓名： | 田义超 李晶 任志远 |
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| 作者单位： | 陕西师范大学旅游与环境学院 |
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| 基金项目： | 国家自然科学基金项目(41001388、41071057);第47批中国博士后科学基金项目(20100471596)资助 |
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| 摘 要： | 以黄土高原过去300年来的耕地栅格数据为基础,运用ESDA(探索性空间分析方法)对黄土高原近300年来各县(旗)区的耕地变化情况进行了动态实证分析。结果表明:1)在过去的300年中,黄土高原耕地面积呈现出从增加到减少,然后又到增加的趋势;2)黄土高原各县(旗)域耕地面积存在着显著的空间集聚效应,并且各县(旗)域Moran's I指数都为正;3)黄土高原各县(旗)耕地面积的两种集聚类型("高高"低低")在时空上存在着明显的分带现象,且变化规律存在着显著的空间分异特征。
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| 关 键 词： | 黄土高原 耕地 探索性空间分析 ESDA |
The crop land change and spatial pattern in Loess Plateau over past 300 years |
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| TIAN Yichao,LI Jing,REN Zhiyuan. The crop land change and spatial pattern in Loess Plateau over past 300 years[J]. Journal of Arid Land Resources and Environment, 2012, 0(2): 94-101 |
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| Authors: | TIAN Yichao LI Jing REN Zhiyuan |
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| Affiliation: | (College of Tourism and Environment,Shaanxi Normal University,Xi’an 710062,Shaanxi,P.R.China) |
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| Abstract: | Based on the crop land raster data of the Loess Plateau over past 300 years,we utilized Exploratory Spatial Data Analysis(ESDA) to analyze the change of crop land area of counties in the Loess Plateau over 300 years.The results indicated that in the past three hundred years,the crop land area in Loess Plateau showed the tendency from increase to decrease,and then increase again.The global Moran’s I indexes for crop land area per capita at county level of Loess Plateau reached the significant positive spatial correlation.The crop land area among counties on Loess Plateau took on evident spatial accumulative effect.The two types of clusters(High-High and Low-Low) among counties on Loess Plateau had a significant zonation,and it’s variation rule showed dramatic spatial differentiation characteristics. |
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| Keywords: | Loess Plateau crop land exploratory spatial data analysis ESDA |
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