干旱区生态环境知识资源中心(Arid): 农牧交错区植被覆盖度动态变化遥感监测以宁夏盐池为例

Arid

	农牧交错区植被覆盖度动态变化遥感监测以宁夏盐池为例
其他题名	RS Monitoring on the Dynamic Change of Vegetation Coverage in a Farming-pasturing Ecotone--A Case Study in Yanchi County, Ningxia Hui Autonomous Region
	乔锋 1; 张克斌1 ; 张生英 2; 刘刚 1; 李瑞 1; 杨俊杰 1
ISSN	1001-4675
出版年	2006
卷号	23 期号:2 页码:283-288
中文摘要	基于植被指数（NDVI）和植被覆盖度像元分解模型,建立了TM影像尺度下的盐池县植被覆盖度遥感定量模型,在此基础上研究了盐池县1989年和2003年2个时期植被覆盖度的动态变化.结果表明：盐池县2003年低覆盖度植被明显减少,较1989年减少了1 412.52 km^2,中等植被盖度较1989年明显增加,为4 672.46 km^2.中等植被覆盖度、高植被覆盖度在全县比例均有不同程度的增加.研究期间,植被覆盖等级未变化面积为3 692.32 km^2,主要由中等植被覆盖度构成.植被退化面积为608.61 km^2,而植被恢复面积达到3 310.13 km^2,是退化面积的5.4倍.并进一步分析了植被覆盖度变化的原因.
英文摘要	Vegetation coverage is an important index to measure land covers, and it is regarded as an important input parameter in evaluating land desertification, monitoring water loss and soil erosion, and developing the distributed hydrological model. In the process of land desertification, the dynamic change of vegetation factors, such as the vegetation coverage and biomass, are the main factors reflecting the vegetation productivity, and also the main factors indicating land desertification development or reversion. In this paper, a model of quantitatively monitoring the vegetation coverage at TM image scale in Yanchi County is developed based on NDVI and vegetation coverage pixel decomposed model, on which the dynamic change of vegetation coverage in the county in 1989 and 2003 is researched. The results show that the area with low vegetation coverage in 2003 was significantly reduced than that in 1989, and it was reduced by 1 412.52 km^2 ; the area with moderate vegetation coverage in 2003 was significantly enlarged than that in 1989, and it was enlarged by 4 672.46 km^2. The proportions of the areas with moderate and high vegetation coverage were increased in varying degrees. During the research period, the area of the regions of vegetation type without change was 3 692.32 km^2, which occupied 48.5% of the total area and was mainly composed of the regions with moderate vegetation coverage. The area of the regions where the vegetation was degenerated was 608.61 km^2, and the area of the regions where the vegetation was regenerated was 3 310.13 km^2, and it was 5.4 times of that where the vegetation was degenerated. All these reveal that the vegetation coverage in the study area is currently increased. The causes resulting in the change of vegetation coverage in the study area are analyzed.
中文关键词	植被指数（NDVI） ; 农牧交错带 ; 荒漠化 ; 遥感 ; TM影像 ; 盐池 ; 宁夏
英文关键词	NDVI Yanchi County Ningxia Hui Autonomous Region desertification remote sensing TMimage
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2461092
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219734
作者单位	1.北京林业大学水土保持学院, 北京 100083, 中国; 2.盐池机械化林场, 盐池, 宁夏 751500, 中国
推荐引用方式 GB/T 7714	乔锋,张克斌,张生英,等. 农牧交错区植被覆盖度动态变化遥感监测以宁夏盐池为例[J]. 北京林业大学,2006,23(2):283-288.
APA	乔锋,张克斌,张生英,刘刚,李瑞,&杨俊杰.(2006).农牧交错区植被覆盖度动态变化遥感监测以宁夏盐池为例.,23(2),283-288.
MLA	乔锋,et al."农牧交错区植被覆盖度动态变化遥感监测以宁夏盐池为例".23.2(2006):283-288.