干旱区生态环境知识资源中心(Arid): Effects of rapid urbanization on streamflow, erosion, and sedimentation in a desert stream in the American Southwest

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DOI	10.1016/j.ancene.2015.09.002
	Effects of rapid urbanization on streamflow, erosion, and sedimentation in a desert stream in the American Southwest
	Whitney, John W.; Glancy, Patrick A.; Buckingham, Susan E.; Ehrenberg, Arthur C.
通讯作者	Whitney, JW
来源期刊	ANTHROPOCENE
ISSN	2213-3054
出版年	2015
卷号	10 页码:29-42
英文摘要	Rapid urbanization has resulted in a series of sequential effects on a desert stream in the American Southwest. Lower Las Vegas Wash was a dry wash characterized by infrequent flood deposition when Las Vegas, Nevada was established in 1905. Wastewater effluent was discharged into the wash in low volumes for over 3 decades. Wastewater volumes increased commensurably with accelerated population growth during the late 20th century and created a sequence of feedback effects on the floodplain. Initially slow saturation of the valley fill created a desert oasis of dense floodplain vegetation and wetlands. Annual streamflow began in 1958 and erosion began a decade later with shallow incision in discontinuous channel segments. Increasing baseflow gradually enlarged channels; headcutting was active during the 1970s to 1984. The incised channels concentrated storm runoff, which accelerated local channel erosion, and in 1984 the headcuts were integrated during a series of monsoon floods. Wetlands were drained and most floodplain vegetation destroyed. Channel erosion continued unabated until engineering interventions began in the 21st century. No natural channel recovery occurred after initial urbanization effects because streamflow never stabilized in the late 20th century. A 6.6 M m(3) sediment slug, eroded from the wash in similar to 25 years, was deposited in Las Vegas Bay in Lake Mead. Falling reservoir levels during the 21st century are responsible for sediment redistribution and infilling of the bay. Close monitoring of impacts is recommended when urban wastewater and storm runoff are discharged on a desert wash. Channel interventions, when necessary, are advised in order to prevent costly engineering schemes of channel stabilization, flood control, and floodplain restoration. Published by Elsevier Ltd.
英文关键词	Urbanization Wastewater Wetlands Floods Erosion Delta
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000381903400003
WOS关键词	LAS-VEGAS WASH ; NEVADA ; URBAN ; MANAGEMENT ; CHANNELS ; DYNAMICS
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331260
作者单位	[Whitney, John W.] US Geol Survey, Fed Ctr, MS 980, Denver, CO 80225 USA; [Glancy, Patrick A.] US Geol Survey, 2730 Deer Run Rd, Carson City, NV 89701 USA; [Buckingham, Susan E.] 2740 South Kearny St, Denver, CO 80222 USA; [Ehrenberg, Arthur C.] 1620 Plata Pico Dr, Las Vegas, NV 89128 USA
推荐引用方式 GB/T 7714	Whitney, John W.,Glancy, Patrick A.,Buckingham, Susan E.,et al. Effects of rapid urbanization on streamflow, erosion, and sedimentation in a desert stream in the American Southwest[J]. United States Geological Survey,2015,10:29-42.
APA	Whitney, John W.,Glancy, Patrick A.,Buckingham, Susan E.,&Ehrenberg, Arthur C..(2015).Effects of rapid urbanization on streamflow, erosion, and sedimentation in a desert stream in the American Southwest.ANTHROPOCENE,10,29-42.
MLA	Whitney, John W.,et al."Effects of rapid urbanization on streamflow, erosion, and sedimentation in a desert stream in the American Southwest".ANTHROPOCENE 10(2015):29-42.