Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jhydrol.2013.11.047 |
High-resolution characterization of a semiarid watershed: Implications on evapotranspiration estimates | |
Templeton, Ryan C.1; Vivoni, Enrique R.1,2; Mendez-Barroso, Luis A.2; Pierini, Nicole A.1; Anderson, Cody A.1; Rango, Albert3; Laliberte, Andrea S.4; Scott, Russell L.5 | |
通讯作者 | Vivoni, Enrique R. |
来源期刊 | JOURNAL OF HYDROLOGY
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ISSN | 0022-1694 |
EISSN | 1879-2707 |
出版年 | 2014 |
卷号 | 509页码:306-319 |
英文摘要 | The North American monsoon (NAM) contributes roughly half of the annual precipitation in the Chihuahuan Desert from July to September. Relatively frequent, intense storms increase soil moisture and lead to ephemeral runoff. Quantifying these processes, however, is difficult due to the sparse nature of existing observations. This study presents results from a dense network of rain gauges, soil probes, channel flumes, and an eddy covariance tower in a small watershed of the Jornada Experimental Range. Using this network, the temporal and spatial variability of soil moisture conditions and channel runoff were assessed from June 2010 to September 2011. In addition, tower measurements were used to quantify the seasonal, monthly and event-scale changes in land-atmosphere states and fluxes. Results from this study indicate a strong seasonality in water and energy fluxes, with a reduction in the Bowen ratio (B) from winter (B = 14) to summer (B = 3.3). This reduction was tied to higher shallow soil moisture (theta) availability during the summer (0 = 0.040 m(3)/m(3)) as compared to winter (0 = 0.004 m(3)/m(3)). Four consecutive rainfall-runoff events during the NAM were used to quantify the soil moisture and channel runoff responses and how water availability impacted land-atmosphere fluxes. The network also allowed comparisons of several approaches to estimate evapotranspiration (ET). using a water balance residual approach, a more accurate ET estimate was obtained when distributed measurements were used, as opposed to single site measurements at the tower. In addition, the spatially-varied soil moisture data yielded a more reasonable daily relation between ET and 0, an important parameterization in many hydrologic models. These analyses illustrate the value of high-resolution sampling in small watersheds to characterize hydrologic processes. (C) 2013 Elsevier B.V. All rights reserved. |
英文关键词 | Watershed hydrology Mixed shrubland Environmental sensor network Soil moisture Evapotranspiration Unmanned Aerial Vehicle |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000331662800025 |
WOS关键词 | SPATIAL VARIABILITY ; NORTHWEST MEXICO ; COMPLEX TERRAIN ; SOIL-MOISTURE ; WOODY-PLANTS ; MONSOON ; CATCHMENT ; GRASSLAND ; DYNAMICS ; RAINFALL |
WOS类目 | Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Engineering ; Geology ; Water Resources |
来源机构 | Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/183417 |
作者单位 | 1.Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ 85287 USA; 2.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA; 3.USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA; 4.Earthmetrics, Brownsville, OR 97327 USA; 5.USDA ARS Southwest Watershed Res Ctr, Tucson, AZ 85719 USA |
推荐引用方式 GB/T 7714 | Templeton, Ryan C.,Vivoni, Enrique R.,Mendez-Barroso, Luis A.,et al. High-resolution characterization of a semiarid watershed: Implications on evapotranspiration estimates[J]. Arizona State University,2014,509:306-319. |
APA | Templeton, Ryan C..,Vivoni, Enrique R..,Mendez-Barroso, Luis A..,Pierini, Nicole A..,Anderson, Cody A..,...&Scott, Russell L..(2014).High-resolution characterization of a semiarid watershed: Implications on evapotranspiration estimates.JOURNAL OF HYDROLOGY,509,306-319. |
MLA | Templeton, Ryan C.,et al."High-resolution characterization of a semiarid watershed: Implications on evapotranspiration estimates".JOURNAL OF HYDROLOGY 509(2014):306-319. |
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