DOI: 10.5194/hess-21-1051-2017
Scopus记录号: 2-s2.0-85013231685
论文题名: A case study of field-scale maize irrigation patterns in western Nebraska: Implications for water managers and recommendations for hyper-resolution land surface modeling
作者: Gibson J ; , Franz T ; E ; , Wang T ; , Gates J ; , Grassini P ; , Yang H ; , Eisenhauer D
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 2 起始页码: 1051
结束页码: 1062
语种: 英语
Scopus关键词: Crops
; Decision making
; Groundwater
; Managers
; Soil moisture
; Surface measurement
; Atmospheric dynamics
; Center-pivot irrigation
; Irrigation patterns
; Irrigation practices
; Land surface modeling
; Land surface models
; Operational forecasts
; Vadose zone modeling
; Irrigation
; crop production
; database
; decision making
; field method
; hydrological modeling
; irrigation system
; land surface
; maize
; spatial resolution
; vadose zone
; water management
; Nebraska
; United States
; Zea mays
英文摘要: In many agricultural regions, the human use of water for irrigation is often ignored or poorly represented in land surface models (LSMs) and operational forecasts. Because irrigation increases soil moisture, feedback on the surface energy balance, rainfall recycling, and atmospheric dynamics is not represented and may lead to reduced model skill. In this work, we describe four plausible and relatively simple irrigation routines that can be coupled to the next generation of hyper-resolution LSMs operating at scales of 1 km or less. The irrigation output from the four routines (crop model, precipitation delayed, evapotranspiration replacement, and vadose zone model) is compared against a historical field-scale irrigation database (2008-2014) from a 35 km2 study area under maize production and center pivot irrigation in western Nebraska (USA). We find that the most yield-conservative irrigation routine (crop model) produces seasonal totals of irrigation that compare well against the observed irrigation amounts across a range of wet and dry years but with a low bias of 80 mm yrg-1. The most aggressive irrigation saving routine (vadose zone model) indicates a potential irrigation savings of 120 mm yrg-1 and yield losses of less than 3 % against the crop model benchmark and historical averages. The results of the various irrigation routines and associated yield penalties will be valuable for future consideration by local water managers to be informed about the potential value of irrigation saving technologies and irrigation practices. Moreover, the routines offer the hyper-resolution LSM community a range of irrigation routines to better constrain irrigation decision-making at critical temporal (daily) and spatial scales (<-1 km). © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79252
Appears in Collections: 气候变化事实与影响
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作者单位: School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, United States; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China; Climate Corporation, San Francisco, CA, United States; Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, United States; Biological Systems Engineering Department, University of Nebraska-Lincoln, Lincoln, NE, United States
Recommended Citation:
Gibson J,, Franz T,E,et al. A case study of field-scale maize irrigation patterns in western Nebraska: Implications for water managers and recommendations for hyper-resolution land surface modeling[J]. Hydrology and Earth System Sciences,2017-01-01,21(2)