Arid
DOI10.1016/j.geomorph.2003.07.016
Climatic influences on Holocene variations in soil erosion rates on a small hill in the Mojave Desert
Hunt, AG; Wu, JQ
通讯作者Wu, JQ
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2004
卷号58期号:1-4页码:263-289
英文摘要

A detailed study of a small hill in NE Mojave Desert in eastern California was conducted to elucidate the effect of climate on the variations in soil erosion rates through Holocene. Field surveys and sampling were carried out to obtain information on topography, geomorphology, soil and vegetation conditions, seismic refraction, sediment deposition, and hillslope processes. Integration of this information allowed reconstruction of the hill topography at the end of the Pleistocene, deduction of the evolution of the hill from the end of the Pleistocene to the present, and estimation of total soil losses resulting from various hillslope processes. The estimates are consistent with the premise that early Holocene climate change resulted in vegetation change, soil destabilization, and topographic roughening. Current, very slow, hillslope transport rates (e.g., 5 min ky(-1) by rodent burrowing, a presently important transport form) appear inconsistent with the inferred total soil loss rate (31 mm ky(-1)). Packrat midden studies imply that the NE Mojave Desert experienced enhanced monsoonal precipitation in the early Holocene, presumably accentuating soil loss. Water erosion on one slope of the hill was simulated using Water Erosion Prediction Project (WEPP), a process-based erosion model, using 4 and 6 ky of precipitation input compatible with an appropriate monsoonal climate and the present climate, respectively. The WEPP-predicted soil losses for the chosen slope were compatible with inferred soil losses. Identification of two time periods within the Holocene with distinct erosion characteristics may provide new insight into the current state of Mojave Desert landform evolution.. (C) 2003 Elsevier B.V. All rights reserved.


英文关键词soil erosion Mojave Desert holocene climate monsoon WEPP (water erosion prediction project) model
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000220353100014
WOS关键词COSMOGENIC ISOTOPES ; CHANNEL INITIATION ; UNITED-STATES ; ROCK-VARNISH ; EVOLUTION ; MODEL ; EQUILIBRIUM ; TECHNOLOGY ; ARIZONA ; CREEP
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/2XILL650/146838
作者单位(1)Washington State Univ, Dept Biol Syst Engn, Pullman, WA 99164 USA;(2)Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
推荐引用方式
GB/T 7714
Hunt, AG,Wu, JQ. Climatic influences on Holocene variations in soil erosion rates on a small hill in the Mojave Desert[J],2004,58(1-4):263-289.
APA Hunt, AG,&Wu, JQ.(2004).Climatic influences on Holocene variations in soil erosion rates on a small hill in the Mojave Desert.GEOMORPHOLOGY,58(1-4),263-289.
MLA Hunt, AG,et al."Climatic influences on Holocene variations in soil erosion rates on a small hill in the Mojave Desert".GEOMORPHOLOGY 58.1-4(2004):263-289.
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