DOI: 10.5194/hess-20-2295-2016
Scopus记录号: 2-s2.0-84975077017
论文题名: Contrasting watershed-scale trends in runoff and sediment yield complicate rangeland water resources planning
作者: Berg M ; D ; , Marcantonio F ; , Allison M ; A ; , McAlister J ; , Wilcox B ; P ; , Fox W ; E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 6 起始页码: 2295
结束页码: 2307
语种: 英语
Scopus关键词: Geomorphology
; Rain
; Runoff
; Sedimentation
; Sediments
; Water resources
; Water supply
; Watersheds
; Hydrologic function
; Landscape changes
; Precipitation and runoff
; Reservoir sedimentation
; Reservoir sediments
; Reservoir storage
; Runoff and sediment yields
; Water resources planning
; Reservoirs (water)
; land surface
; precipitation (climatology)
; rainfall-runoff modeling
; rangeland
; runoff
; sediment yield
; streamflow
; water demand
; water planning
; water resource
; water supply
; water yield
; watershed
; Texas
; United States
英文摘要: Rangelands cover a large portion of the earth's land surface and are undergoing dramatic landscape changes. At the same time, these ecosystems face increasing expectations to meet growing water supply needs. To address major gaps in our understanding of rangeland hydrologic function, we investigated historical watershed-scale runoff and sediment yield in a dynamic landscape in central Texas, USA. We quantified the relationship between precipitation and runoff and analyzed reservoir sediment cores dated using cesium-137 and lead-210 radioisotopes. Local rainfall and streamflow showed no directional trend over a period of 85 years, resulting in a rainfall-runoff ratio that has been resilient to watershed changes. Reservoir sedimentation rates generally were higher before 1963, but have been much lower and very stable since that time. Our findings suggest that (1) rangeland water yields may be stable over long periods despite dramatic landscape changes while (2) these same landscape changes influence sediment yields that impact downstream reservoir storage. Relying on rangelands to meet water needs demands an understanding of how these dynamic landscapes function and a quantification of the physical processes at work. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78820
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Ecosystem Science and Management, Texas A and M University, College Station, TX, United States; Department of Geology and Geophysics, Texas A and M University, College Station, TX, United States; Water Institute of the Gulf, Baton Rouge, LA, United States; Tulane University, Department of Earth and Environmental Sciences, New Orleans, LA, United States; Texas A and M AgriLife Blackland Research and Extension Center, Temple, TX, United States; Save Water Co, Houston, TX, United States
Recommended Citation:
Berg M,D,, Marcantonio F,et al. Contrasting watershed-scale trends in runoff and sediment yield complicate rangeland water resources planning[J]. Hydrology and Earth System Sciences,2016-01-01,20(6)