Linking vegetation cover patterns to hydrological responses using two process-based pattern indices at the plot scale

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Linking vegetation cover patterns to hydrological responses using two process-based pattern indices at the plot scale
	Liu Yu 1,2; Fu BoJie 1; Lu YiHe 1; Gao GuangYao 1; Wang Shuai 1; Zhou Ji 1
刊名	SCIENCE CHINA-EARTH SCIENCES
	2013-11-01
卷号	56 期号:11 页码:1888-1898
关键词	cover pattern indices runoff soil erosion vegetation cover pattern
通讯作者	Fu, BJ
中文摘要	Vegetation cover pattern is one of the factors controlling hydrological processes. Spatially distributed models are the primary tools previously applied to document the effect of vegetation cover patterns on runoff and soil erosion. Models provide precise estimations of runoff and sediment yields for a given vegetation cover pattern. However, difficulties in parameterization and the problematic explanation of the causes of runoff and sedimentation rates variation weaken prediction capability of these models. Landscape pattern analysis employing pattern indices based on runoff and soil erosion mechanism provides new tools for finding a solution. In this study, the vegetation cover pattern was linked with runoff and soil erosion by two previously developed pattern indices, which were modified in this study, the Directional Leakiness Index (DLI) and Flowlength. Although they use different formats, both indices involve connectivity of sources areas (interpatch bare areas). The indices were revised by bringing in the functional heterogeneity of the plant cover types and the landscape position. Using both artificial and field verified vegetation cover maps, observed runoff and sediment production on experiment plots, we tested the indices' efficiency and compared the indices with their antecedents. The results illustrate that the modified indices are more effective in indicating runoff at the plot/hillslope scale than their antecedents. However, sediment export levels are not provided by the modified indices. This can be attributed to multi-factor interaction on the hydrological process, the feedback mechanism between the hydrological function of cover patterns and threshold phenomena in hydrological processes.
英文摘要	Vegetation cover pattern is one of the factors controlling hydrological processes. Spatially distributed models are the primary tools previously applied to document the effect of vegetation cover patterns on runoff and soil erosion. Models provide precise estimations of runoff and sediment yields for a given vegetation cover pattern. However, difficulties in parameterization and the problematic explanation of the causes of runoff and sedimentation rates variation weaken prediction capability of these models. Landscape pattern analysis employing pattern indices based on runoff and soil erosion mechanism provides new tools for finding a solution. In this study, the vegetation cover pattern was linked with runoff and soil erosion by two previously developed pattern indices, which were modified in this study, the Directional Leakiness Index (DLI) and Flowlength. Although they use different formats, both indices involve connectivity of sources areas (interpatch bare areas). The indices were revised by bringing in the functional heterogeneity of the plant cover types and the landscape position. Using both artificial and field verified vegetation cover maps, observed runoff and sediment production on experiment plots, we tested the indices' efficiency and compared the indices with their antecedents. The results illustrate that the modified indices are more effective in indicating runoff at the plot/hillslope scale than their antecedents. However, sediment export levels are not provided by the modified indices. This can be attributed to multi-factor interaction on the hydrological process, the feedback mechanism between the hydrological function of cover patterns and threshold phenomena in hydrological processes.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geosciences, Multidisciplinary
研究领域[WOS]	Geology
关键词[WOS]	SOIL-EROSION ; LAND-COVER ; SEMIARID LANDSCAPES ; RUNOFF GENERATION ; SEDIMENT YIELD ; CATCHMENT ; CONNECTIVITY ; SYSTEMS ; SPAIN ; LIMITATIONS
收录类别	SCI
语种	英语
WOS记录号	WOS:000326459500007
公开日期	2014-06-04
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7265]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Lab Digital Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Liu Yu,Fu BoJie,Lu YiHe,et al. Linking vegetation cover patterns to hydrological responses using two process-based pattern indices at the plot scale[J]. SCIENCE CHINA-EARTH SCIENCES,2013,56(11):1888-1898.
APA	Liu Yu,Fu BoJie,Lu YiHe,Gao GuangYao,Wang Shuai,&Zhou Ji.(2013).Linking vegetation cover patterns to hydrological responses using two process-based pattern indices at the plot scale.SCIENCE CHINA-EARTH SCIENCES,56(11),1888-1898.
MLA	Liu Yu,et al."Linking vegetation cover patterns to hydrological responses using two process-based pattern indices at the plot scale".SCIENCE CHINA-EARTH SCIENCES 56.11(2013):1888-1898.