NDLI: Estimate crop evapotranspiration of spring wheat in the middle reaches of Heihe River basin, Northwestern China

Content Provider	IEEE Xplore Digital Library
Author	Yao Wang Chuanyan Zhao Zhonglin Xu Huanhua Peng
Copyright Year	2010
Description	Author affiliation: Key Laboratory of Arid and Grassland Agroecology with the Ministry of Education, Lanzhou University, 730000, China (Yao Wang; Chuanyan Zhao) \|\| Key Laboratory of Western China's Environmental Systems with the Ministry of Education, Lanzhou University, 730000, China (Zhonglin Xu; Huanhua Peng)
Abstract	Sustainability of irrigated agriculture depends primarily on the efficient management of irrigation water. Understanding crop evapotranspiration (ETc) is essential in planning the most effective use of water resources in the arid northwest China. The objective of this study is to analyze the variation of water requirement in the middle reaches of Heihe River basin. First, reference crop evapotranspiration (ET0) was calculated using eight different models including Penman-Monteith, Priestley-Taylor, Blaney-Criddle, Hargreaves, FAO-Radiation, Irmark-Allen, FAO-Penman and Penman with daily data obtained from 14 meteorological stations in and around the study area. Secondly, the crop coefficients (Kc) of spring wheat in different growing stages were adjusted according to the investigation data. Finally, the water requirement of spring wheat was estimated in the middle reaches of Heihe River basin. From the study, the results show that ETc varies from 544 mm to 769 mm during the entire growing season, the ETc in Gaotai, Zhangye, Linze, Minle and Shandan is 631.28, 660.90, 630.02, 682.66, 722.42 and 690.88 mm, respectively, the ETc of mid-season stage is the largest percentage during the entire growing season, accounting for 60.8%, 77.5%, 62.1%, 78.3%, and 61.5% of total ETc at five meteorological stations, respectively.
Starting Page	1537
Ending Page	1540
File Size	264108
Page Count	4
File Format	PDF
ISBN	9781424495658
ISSN	21537003
e-ISBN	9781424495665
e-ISBN	9781424495641
DOI	10.1109/IGARSS.2010.5653589
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Springs Irrigation Mathematical model Rivers Equations Water resources the middle reaches of Heihe River basin Crop evapotranspiration meteorological data
Content Type	Text
Resource Type	Article

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