DOI: 10.5194/hess-21-1263-2017
Scopus记录号: 2-s2.0-85014518721
论文题名: Feasibility analysis of using inverse modeling for estimating field-scale evapotranspiration in maize and soybean fields from soil water content monitoring networks
作者: Foolad F ; , Franz T ; E ; , Wang T ; , Gibson J ; , Kilic A ; , Allen R ; G ; , Suyker A
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 2 起始页码: 1263
结束页码: 1277
语种: 英语
Scopus关键词: Cosmic rays
; Cosmology
; Decision making
; Economic and social effects
; Evapotranspiration
; Groundwater
; Groundwater resources
; Inverse problems
; Parameter estimation
; Scheduling
; Soil moisture
; Soils
; Actual evapotranspiration
; Agricultural monitoring
; Eddy covariance towers
; Ground water recharge
; Human decision making
; Optimal irrigation scheduling
; Soil hydraulic functions
; Soil hydraulic parameterizations
; Recharging (underground waters)
; agricultural land
; benchmarking
; decision making
; eddy covariance
; evapotranspiration
; feasibility study
; maize
; monitoring system
; numerical model
; recharge
; soil texture
; soil water
; soybean
; vadose zone
; water content
; Nebraska
; United States
; Glycine max
; Zea mays
英文摘要: In this study, the feasibility of using inverse vadose zone modeling for estimating field-scale actual evapotranspiration (ETa) was explored at a long-term agricultural monitoring site in eastern Nebraska. Data from both point-scale soil water content (SWC) sensors and the area-average technique of cosmic-ray neutron probes were evaluated against independent ETa estimates from a co-located eddy covariance tower. While this methodology has been successfully used for estimates of groundwater recharge, it was essential to assess the performance of other components of the water balance such as ETa. In light of recent evaluations of land surface models (LSMs), independent estimates of hydrologic state variables and fluxes are critically needed benchmarks. The results here indicate reasonable estimates of daily and annual ETa from the point sensors, but with highly varied soil hydraulic function parameterizations due to local soil texture variability. The results of multiple soil hydraulic parameterizations leading to equally good ETa estimates is consistent with the hydrological principle of equifinality. While this study focused on one particular site, the framework can be easily applied to other SWC monitoring networks across the globe. The value-added products of groundwater recharge and ETa flux from the SWC monitoring networks will provide additional and more robust benchmarks for the validation of LSM that continues to improve their forecast skill. In addition, the value-added products of groundwater recharge and ETa often have more direct impacts on societal decision-making than SWC alone. Water flux impacts human decision-making from policies on the long-term management of groundwater resources (recharge), to yield forecasts (ETa), and to optimal irrigation scheduling (ETa). Illustrating the societal benefits of SWC monitoring is critical to insure the continued operation and expansion of these public datasets. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79237
Appears in Collections: 气候变化事实与影响
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作者单位: Civil Engineering Department, University of Nebraska, Lincoln, NE, United States; School of Natural Resources, University of Nebraska, Lincoln, NE, United States; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China; Kimberly Research and Extension Center, University of Idaho, Kimberly, ID, United States
Recommended Citation:
Foolad F,, Franz T,E,et al. Feasibility analysis of using inverse modeling for estimating field-scale evapotranspiration in maize and soybean fields from soil water content monitoring networks[J]. Hydrology and Earth System Sciences,2017-01-01,21(2)