DOI: 10.5194/hess-18-3855-2014
Scopus记录号: 2-s2.0-84907487572
论文题名: Hydroclimatic regimes: A distributed water-balance framework for hydrologic assessment, classification, and management
作者: Weiskel P ; K ; , Wolock D ; M ; , Zarriello P ; J ; , Vogel R ; M ; , Levin S ; B ; , Lent R ; M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 10 起始页码: 3855
结束页码: 3872
语种: 英语
Scopus关键词: Hydroclimatic
; global climate
; hydrological cycle
; hydrological regime
; hydrological response
; hydrometeorology
; runoff
; twentieth century
; water availability
; water budget
; United States
英文摘要: Runoff-based indicators of terrestrial water availability are appropriate for humid regions, but have tended to limit our basic hydrologic understanding of drylands - the dry-subhumid, semiarid, and arid regions which presently cover nearly half of the global land surface. In response, we introduce an indicator framework that gives equal weight to humid and dryland regions, accounting fully for both vertical (precipitation + evapotranspiration) and horizontal (groundwater + surface-water) components of the hydrologic cycle in any given location - as well as fluxes into and out of landscape storage. We apply the framework to a diverse hydroclimatic region (the conterminous USA) using a distributed water-balance model consisting of 53 400 networked landscape hydrologic units. Our model simulations indicate that about 21% of the conterminous USA either generated no runoff or consumed runoff from upgradient sources on a mean-annual basis during the 20th century. Vertical fluxes exceeded horizontal fluxes across 76% of the conterminous area. Long-term-average total water availability (TWA) during the 20th century, defined here as the total influx to a landscape hydrologic unit from precipitation, groundwater, and surface water, varied spatially by about 400 000-fold, a range of variation ∼100 times larger than that for mean-annual runoff across the same area. The framework includes but is not limited to classical, runoff-based approaches to water-resource assessment. It also incorporates and reinterprets the green- and blue-water perspective now gaining international acceptance. Implications of the new framework for several areas of contemporary hydrology are explored, and the data requirements of the approach are discussed in relation to the increasing availability of gridded global climate, land-surface, and hydrologic data sets. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78119
Appears in Collections: 气候变化事实与影响
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作者单位: US Geological Survey, Northborough, MA, United States; US Geological Survey, Lawrence, KS, United States; Department of Civil and Environmental Engineering, Tufts University, Medford, MA, United States; US Geological Survey, Augusta, ME, United States
Recommended Citation:
Weiskel P,K,, Wolock D,et al. Hydroclimatic regimes: A distributed water-balance framework for hydrologic assessment, classification, and management[J]. Hydrology and Earth System Sciences,2014-01-01,18(10)