[1]土 祥,王春梅*,庞国伟,等.黄土丘陵沟壑区坡度尺度效应空间分异分析[J].山地学报,2018,(06):964-972.[doi:10.16089/j.cnki.1008-2786.000391]
　TU Xiang,WANG Chunmei*,PANG Guowei,et al.On the Spatial Differentiation of Scale Effect of Slopes in Loess Hill and Gully Region, China[J].Mountain Research,2018,(06):964-972.[doi:10.16089/j.cnki.1008-2786.000391]
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黄土丘陵沟壑区坡度尺度效应空间分异分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2018年06期
页码:
964-972
栏目:
山地技术
出版日期:
2018-11-30

文章信息/Info

Title:
On the Spatial Differentiation of Scale Effect of Slopes in Loess Hill and Gully Region, China
文章编号:
1008-2786-(2018)6-964-09
作者:
土 祥; 王春梅*; 庞国伟; 杨勤科; 温伯清
西北大学 城市与环境学院,西安 710127
Author(s):
TU Xiang;  WANG Chunmei*;  PANG Guowei;  YANG Qinke;  WEN Boqing
College of Urban and Environmental Science, Northwest University, Xi'an 710127, China
关键词:
DEM;  坡度尺度效应;  地统计学;  地形空间频率;  独立结构变异函数模型
Keywords:
DEM;  slope scale effect;  geostatistics;  topographic spatial frequency;  independent structures model
分类号:
P91
DOI:
10.16089/j.cnki.1008-2786.000391
文献标志码:
A
摘要:
基于DEM提取的地形因子随分辨率变化问题(尺度效应)受到广泛关注,不同地貌类型区地形因子随分辨率变化规律存在差异,其差异的机理性原因还有待进一步探讨。本研究以黄土丘陵沟壑区五个副区为研究区,统计了不同地貌类型区坡度随分辨率变化规律,计算了高程变异函数,并引入独立结构变异函数模型(Independent Structures Model, ISM)拟合了高程表面不同空间频率层次,分析了地形空间频率层次在黄土丘陵沟壑区的空间分异规律,从而进一步分析坡度随分辨率变化规律与地形空间频率层次之间的关系。研究表明:平均坡度相近的地区坡度随分辨率变化规律并不相同,高频地形信息的存在与否及其所占比重,是决定一个地区坡度随分辨率变化衰减程度的重要因素,在坡度随分辨率变化衰减程度和坡度尺度变换研究及应用中应考虑研究区内地形空间频率组成情况,这对于丰富和完善数字地形分析理论体系具有重要意义。
Abstract:
Terrain factors extracted from DEM change with resolution(scale effect), to which it has received wide attention. The regular pattern of changes in the terrain factors with resolution vary with types of landforms, and the reason for the variation remains to be further discussed. In this study, it took five sub-regions in loess hill and gully region as study areas to investigate the regularity of slope variation with resolution at different loess landforms. It used elevation semi-variogram and introduced an Independent Structure Model(ISM)to fit the component with different spatial frequencies on the height surface. It conducted inspection of the spatial variation regularity of topographic spatial frequency level in hilly and gullied loess region, and further examined the relationship between the variation of slopes with resolution and the spatial frequency level of terrains. Results showed that the change law of slope with resolution was not the same as ones in areas with the similar average slope. The presence or absence of high-frequency terrain information and its proportion were important factors in determining the degree of attenuation of slope variation with resolution in a region. In the researches and applications related to slope scale effect and scale transformation in Hilly and gullied loess region, it should take into account of the spatial frequency composition of terrain, which is of great significance for enriching and perfecting the theoretical system of digital terrain analysis.

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备注/Memo

备注/Memo:
收稿日期(Received date):2018-04-28; 改回日期(Accepted date): 2018-10-16
基金项目(Foundation item):国家重点研发计划项目(2017YFD0800500); 国家自然科学基金(41371274,41601290,41301284)。 [National Key Research and Development Program of China(2017YFD0800500); National Natural Science Foundation of China(41371274, 41601290, 41301284)]
作者简介(Biography):土祥(1993-),男,陕西省咸阳市人,硕士研究生,主要研究方向为数字地形分析与GIS应用。[TU Xiang(1993-),male, born in Xianyang, Shaanxi province, M. Sc. candidate, research on digital terrain analysis and GIS application] E-mail:tuxiang1993@126.com
*通讯作者(Corresponding author):王春梅(1983-),女, 山东省德州市人,博士,副教授,主要研究方向为侵蚀地形分析。[WANG Chunmei(1983-),female, Ph. D.,associate professor, research on soil erosion assessment based on remote sensing and GIS] E-mail:cmwang@nwu.edu.cn
更新日期/Last Update: 2018-11-30