干旱区生态环境知识资源中心(Arid): Estimating water balance components in irrigated agriculture using a combined approach of soil moisture and energy balance monitoring, and numerical modelling

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DOI	10.1002/hyp.14077
	Estimating water balance components in irrigated agriculture using a combined approach of soil moisture and energy balance monitoring, and numerical modelling
	Schulz, Stephan; Becker, Rike; Richard-Cerda, Juan Carlos; Usman, Muhammad; aus der Beek, Tim; Merz, Ralf; Schueth, Christoph
通讯作者	Schulz, S (corresponding author), Tech Univ Darmstadt, Inst Appl Geosci, Schnittspahnstr 9, D-64287 Darmstadt, Hessen, Germany.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2021
卷号	35 期号:3
英文摘要	Information on water balance components such as evapotranspiration and groundwater recharge are crucial for water management. Due to differences in physical conditions, but also due to limited budgets, there is not one universal best practice, but a wide range of different methods with specific advantages and disadvantages. In this study, we propose an approach to quantify actual evapotranspiration, groundwater recharge and water inflow, i.e. precipitation and irrigation, that considers the specific conditions of irrigated agriculture in warm, arid environments. This approach does not require direct measurements of precipitation or irrigation quantities and is therefore suitable for sites with an uncertain data basis. For this purpose, we combine soil moisture and energy balance monitoring, remote sensing data analysis and numerical modelling using Hydrus. Energy balance data and routine weather data serve to estimate ET0. Surface reflectance data from satellite images (Sentinel-2) are used to derive leaf area indices, which help to partition ET0 into energy limited evaporation and transpiration. Subsequently, first approximations of water inflow are derived based on observed soil moisture changes. These inflow estimates are used in a series of forward simulations that produce initial estimates of drainage and ETact, which in turn help improve the estimate of water inflow. Finally, the improved inflow estimates are incorporated into the model and then a parameter optimization is performed using the observed soil moisture as the reference figure. Forward simulations with calibrated soil parameters result in final estimates for ETact and groundwater recharge. The presented method is applied to an agricultural test site with a crop rotation of cotton and wheat in Punjab, Pakistan. The final model results, with an RMSE of 2.2% in volumetric water content, suggest a cumulative ETact and groundwater recharge of 769 and 297 mm over a period of 281 days, respectively. The total estimated water inflow accounts for 946 mm, of which 77% originates from irrigation.
英文关键词	actual evapotranspiration ground heat flux groundwater recharge Hydrus irrigation net radiation Sentinel‐ 2 soil moisture
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000636346700013
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368965
作者单位	[Schulz, Stephan; Becker, Rike; Richard-Cerda, Juan Carlos; Schueth, Christoph] Tech Univ Darmstadt, Inst Appl Geosci, Schnittspahnstr 9, D-64287 Darmstadt, Hessen, Germany; [Becker, Rike; aus der Beek, Tim; Schueth, Christoph] IWW Inst forWater Res Rhineland Westphalia, Water Resources Management, Mulheim, Germany; [Usman, Muhammad] Martin Luther Univ Halle Wittenberg, Dept Geoecol, Halle, Germany; [Merz, Ralf] UFZ Helmholtz Ctr Environm Res, Dept Catchment Hydrol, Halle, Germany
推荐引用方式 GB/T 7714	Schulz, Stephan,Becker, Rike,Richard-Cerda, Juan Carlos,et al. Estimating water balance components in irrigated agriculture using a combined approach of soil moisture and energy balance monitoring, and numerical modelling[J],2021,35(3).
APA	Schulz, Stephan.,Becker, Rike.,Richard-Cerda, Juan Carlos.,Usman, Muhammad.,aus der Beek, Tim.,...&Schueth, Christoph.(2021).Estimating water balance components in irrigated agriculture using a combined approach of soil moisture and energy balance monitoring, and numerical modelling.HYDROLOGICAL PROCESSES,35(3).
MLA	Schulz, Stephan,et al."Estimating water balance components in irrigated agriculture using a combined approach of soil moisture and energy balance monitoring, and numerical modelling".HYDROLOGICAL PROCESSES 35.3(2021).