干旱区生态环境知识资源中心(Arid): 基于RS和GIS的赤水河流域植被覆盖度与各地形因子的相关强度研究

Arid

	基于RS和GIS的赤水河流域植被覆盖度与各地形因子的相关强度研究
其他题名	Correlation Intensity of Vegetation Coverage and Topographic Factors in Chishui Watershed Based on RS and GIS
	蔡宏 1; 何政伟 2; 安艳玲 3; 邓辉 2
来源期刊	地球与环境
ISSN	1672-9250
出版年	2014
卷号	42 期号:4 页码:518-524
中文摘要	以赤水河流域为研究区域,综合运用遥感和GIS技术,用TM遥感影像反演植被覆盖度,用数字高程模型(DEM)提取地形因子并进行子流域的划分与构建;首先借助空间叠加分析,研究了区内植被覆盖度分别随高程、坡度及坡向变化的规律;然后从数理统计的角度分析区内不同植被覆盖度与地形等级因子的相关性,并就相关强度进行排序。研究表明:1、在赤水河流域,中度以上植被覆盖度与坡度、高程与之间,并不是单一的正比关系,其随坡度和高程的增加而先增加后减小,存在着临界坡度区间和临界高程区间。2、不同植被覆盖度下各地形因子的影响程度明显不同。对各级植被覆盖,坡度和坡向对其的影响都明显高于高程;中度植被覆盖受坡向影响较为显著,但随着植被覆盖度的增高坡度的影响越来越显著。该研究对喀斯特区域生态环境的评价和改良具有重要参考价值,同时也为喀斯特地区的植被保护和石漠化防治提供决策依据。
英文摘要	With the application of RS and GIS tools,this study calculated the watershed vegetation coverage from TM,extracted topographical factors and demarcated subwatershed from DEM in the Chishui watershed.Firstly,by overlaying analysis,this paper studied the regularities that the vegetation coverage varied with the elevation,slope and sloped aspect in the region. Then,this paper used the mathematical statistics method to analyze the correlation between different vegetation coverage and topographical factors,and ranked the correlation by intensity.The results showed:firstly,in the Chishui watershed,there was no proportional correlation between the vegetation coverage and altitude,as well as between the vegetation coverage and slope,the medium and above vegetation coverage first increased and then decreased with the increment of altitude or slope,and there were critical slope and critical altitude range in the region.Secondly,the influence of topographical factors was significantly different with respect to different vegetation coverages.To all levels of vegetation coverage,the influence of slope and aspect was significantly higher than altitude.The medium vegetation coverage was significantly affected by the aspect while the affection of the slope was more and more significant with the increment of the vegetation coverage.The study has an important reference value to ecological environmental evaluation and improvement of karst watershed,and also can provide the decisionmaking basis for vegetation protection and integrated control over rock desertification in the region.
中文关键词	喀斯特流域 ; 植被覆盖度 ; 地形因子 ; 数理统计 ; 相关强度
英文关键词	karst watershed vegetation coverage topographical factor mathematical statistics correlation intensity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5236699
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230978
作者单位	1.贵州大学, 喀斯特环境与地质灾害防治教育部重点实验室;;地质灾害防治与地质环境保护国家重点实验室, 贵阳, 贵州 550003, 中国; 2.成都理工大学, 地质灾害防治与地质环境保护国家重点实验室, 成都, 四川 610059, 中国; 3.贵州大学, 喀斯特环境与地质灾害防治教育部重点实验室, 贵阳, 贵州 550003, 中国
推荐引用方式 GB/T 7714	蔡宏,何政伟,安艳玲,等. 基于RS和GIS的赤水河流域植被覆盖度与各地形因子的相关强度研究[J],2014,42(4):518-524.
APA	蔡宏,何政伟,安艳玲,&邓辉.(2014).基于RS和GIS的赤水河流域植被覆盖度与各地形因子的相关强度研究.地球与环境,42(4),518-524.
MLA	蔡宏,et al."基于RS和GIS的赤水河流域植被覆盖度与各地形因子的相关强度研究".地球与环境 42.4(2014):518-524.