| 内蒙古东部地区草地退化的时空分布特征——以巴林右旗为例 |
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| 引用本文： | 岳书平,张树文,闫业超.内蒙古东部地区草地退化的时空分布特征——以巴林右旗为例[J].资源科学,2007,29(6):154-161. |
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| 作者姓名： | 岳书平 张树文 闫业超 |
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| 作者单位： | 1. 中国科学院东北地理与农业生态研究所,长春,130012;中国科学院研究生院,北京,100049
2. 中国科学院东北地理与农业生态研究所,长春,130012 |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | 本文以内蒙古东部牧区作为研究区,利用Landsat TM和MSS遥感数据,借助GIS的空间分析和地统计分析功能,研究典型牧区草地退化的时空分布特征,旨在初步确定草地退化的驱动因素,为科学制定草地退化治理措施与方案提供理论依据。研究结果表明:1976年~2000年间研究区草地总面积变动不大,但是退化草地面积较大,由于草地沙化引起的草地退化占退化总面积的43.79%。从空间分布来看,草地退化主要发生于坡度≤5°的区域,海拔高度与退化率呈反比关系,阳坡和半阴半阳坡草地退化率明显低于阴坡;草地退化率随离居民点距离的增加而降低,在>8km的区域已基本不存在草地退化现象;道路等交通设施的修建对草地退化的影响主要是迁移过程中由于牲畜采食和践踏造成的,与居民点相比影响较小。以上这些分析结果表明,人类活动对草地的强烈干扰破坏了草地生态系统的平衡,成为该区草地退化的重要驱动因素。
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| 关 键 词： | 草地退化 遥感和GIS 时空分布特征 内蒙古东部 |
| 文章编号： | 1007-7588（2007）06-0154-08 |
| 修稿时间： | 2007-03-28 |
Temporal and Spatial Distribution of Grassland Degradation in Eastern Inner Mongolia:A Case Study in Balinyouqi |
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| YUE Shu-ping,ZHANG Shu-wen and YAN Ye-chao.Temporal and Spatial Distribution of Grassland Degradation in Eastern Inner Mongolia:A Case Study in Balinyouqi[J].Resources Science,2007,29(6):154-161. |
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| Authors: | YUE Shu-ping ZHANG Shu-wen and YAN Ye-chao |
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| Institution: | 1. Northeast Institute of Geography and Agriculture Ecology, CAS, Changchun 130012, China; 2. Graduated School of Chinese Academy of Science, Beijing 100049, China |
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| Abstract: | Taking Eastern Inner Mongolia region as the study area and using Landsat TM and MSS image and supported by GIS special analysis function and geological statistical function,this paper studies the temporal and spatial distribution of grassland degradation in typical pastoral area in order to find the driven factors for grassland degradation.This can be the basis of establishing the control measures and project.The result shows that the grassland area in study region hasn't changed greatly from 1976 to 2000.However,the area of degraded grassland is large and the area of deserted grassland occupies 43.79% of the total.From the spatial distribution,the grassland degradation mainly happens in the region where slope is no more than 5 degree;The rate of grassland degradation goes down with the elevation of altitude.The grassland area is bigger in the sunny slope(including the southern slope,the southeast slope and the southwest slope),and the semi-sunny slope(including the eastern slope and the western slope) than that in the northern slope and degradation rate there is low.The area of flat grassland is the low the degradation rate is high.The road and other traffic infrastructure construction have effects on grassland degradation because of the livestock grazing and trample.Analysis shows that the slope degree,direction of slope facet,and altitude have great effects on grassland distribution in the study area.At the same time,the relation between the grassland distribution and the distance to resident site and roads is significant.Human activities have destroyed the balanced grassland ecosystem and become one of important driving forces for grassland degradation. |
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| Keywords: | Grassland degradation RS and GIS Temporal and spatial distribution Eastern Inner Mongol |
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