干旱区生态环境知识资源中心(Arid): Detection of terracettes in semi-arid rangelands using Fourier-based image analysis of very-high-resolution satellite imagery

Arid

DOI	10.1002/esp.4971
	Detection of terracettes in semi-arid rangelands using Fourier-based image analysis of very-high-resolution satellite imagery
	Hellman, Ian; Heinse, Robert; Karl, Jason W.; Corrao, Mark
通讯作者	Heinse, R
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2020
卷号	45 期号:13 页码:3368-3380
英文摘要	Terracettes are repeating step-like microtopographic features roughly following the contours of hillslopes that are often associated with livestock tracks. These common features in many semi-arid rangelands have been shown to alter soil moisture, slope stability, sediment transport, infiltration rates and coincident vegetation patterns. The spatial extent and distribution of terracettes is currently unknown and therefore their landscape-scale hydrological influence is absent in modelling and land management decision making. When viewed in uncalibrated very-high-resolution satellite imagery, terracettes appear as repetitious parallel lines within a specific frequency range. Here we used the two-dimensional discrete Fourier transform to identify terracettes at three test sites in the Inland Pacific Northwest, USA. We created an automated rule-based classification of terracetted sites based on spatial frequency, orientation, slope angle and land-use class. Results show a detection accuracy of 77% based on an optimized spatial frequencies search window between 0.3 and 0.7 m(-1). Terracette orientation did not contribute significantly to detection accuracy because orientations varied +/- 50 degrees from digital elevation model-derived aspects. We found terracettes occurred predominantly on north-facing slopes at our test sites, although this estimate may be exaggerated by the timing of image capture. We feel that the method developed in this paper provides a way forward to map terracettes at large scales and enable new insights into the functions of terracettes in the landscape. (C) 2020 John Wiley & Sons, Ltd.
英文关键词	terracette image analysis hydrology rangeland microtopography
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000586040900019
WOS关键词	LAND-COVER DATABASE ; TEXTURAL ORDINATION ; ACCURACY ASSESSMENT ; MODELING RUNOFF ; SOIL-EROSION ; VEGETATION ; INFILTRATION ; LANDSCAPE ; MICROTOPOGRAPHY ; IDENTIFICATION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327322
作者单位	[Hellman, Ian; Corrao, Mark] Univ Idaho, Water Resources Program, Moscow, ID 83844 USA; [Heinse, Robert] Univ Idaho, Dept Soil & Water Syst, 875 Perimeter Dr MS 2340, Moscow, ID 83844 USA; [Karl, Jason W.] Univ Idaho, Dept Forest Rangeland & Fire Sci, Moscow, ID 83844 USA
推荐引用方式 GB/T 7714	Hellman, Ian,Heinse, Robert,Karl, Jason W.,et al. Detection of terracettes in semi-arid rangelands using Fourier-based image analysis of very-high-resolution satellite imagery[J],2020,45(13):3368-3380.
APA	Hellman, Ian,Heinse, Robert,Karl, Jason W.,&Corrao, Mark.(2020).Detection of terracettes in semi-arid rangelands using Fourier-based image analysis of very-high-resolution satellite imagery.EARTH SURFACE PROCESSES AND LANDFORMS,45(13),3368-3380.
MLA	Hellman, Ian,et al."Detection of terracettes in semi-arid rangelands using Fourier-based image analysis of very-high-resolution satellite imagery".EARTH SURFACE PROCESSES AND LANDFORMS 45.13(2020):3368-3380.