DOI: 10.5194/hess-21-879-2017
Scopus记录号: 2-s2.0-85012901269
论文题名: Using satellite-based evapotranspiration estimates to improve the structure of a simple conceptual rainfall-runoff model
作者: Roy T ; , Gupta H ; V ; , Serrat-Capdevila A ; , Valdes J ; B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 2 起始页码: 879
结束页码: 896
语种: 英语
Scopus关键词: Satellites
; Stream flow
; Actual evapotranspiration
; Daily water balances
; Hydrologic modeling
; Hydrologic models
; Rainfall-runoff modeling
; Spatial resolution
; Streamflow simulations
; Structural improvements
; Evapotranspiration
; catchment
; evapotranspiration
; hydrological modeling
; precipitation assessment
; rainfall-runoff modeling
; satellite imagery
; water budget
英文摘要: Daily, quasi-global (50° N-S and 180°W-E), satellite-based estimates of actual evapotranspiration at 0.25° spatial resolution have recently become available, generated by the Global Land Evaporation Amsterdam Model (GLEAM). We investigate the use of these data to improve the performance of a simple lumped catchmentscale hydrologic model driven by satellite-based precipitation estimates to generate streamflow simulations for a poorly gauged basin in Africa. In one approach, we use GLEAM to constrain the evapotranspiration estimates generated by the model, thereby modifying daily water balance and improving model performance. In an alternative approach, we instead change the structure of the model to improve its ability to simulate actual evapotranspiration (as estimated by GLEAM). Finally, we test whether the GLEAM product is able to further improve the performance of the structurally modified model. Results indicate that while both approaches can provide improved simulations of streamflow, the second approach also improves the simulation of actual evapotranspiration significantly, which substantiates the importance of making "diagnostic structural improvements" to hydrologic models whenever possible. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79260
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Water Global Practice, World Bank, Washington, DC, United States
Recommended Citation:
Roy T,, Gupta H,V,et al. Using satellite-based evapotranspiration estimates to improve the structure of a simple conceptual rainfall-runoff model[J]. Hydrology and Earth System Sciences,2017-01-01,21(2)