Evaluation of pan coefficient for reference crop evapotranspiration for semi-arid region

被引:0
|
作者
H. G. Gundekar
U. M. Khodke
S. Sarkar
R. K. Rai
机构
[1] Indian Institute of Technology Roorkee,Department of Hydrology
[2] Marathwada Agricultural University,Department of Irrigation and Drainage Engineering
[3] State Water Resources Agency,Department of Irrigation
来源
Irrigation Science | 2008年 / 26卷
关键词
Wind Speed; Root Mean Square Error; Mean Absolute Deviation; Reference Crop Evapotranspiration; ASCE Task Committee;
D O I
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中图分类号
学科分类号
摘要
Pan coefficient (Kpan) is the important factor for computation of reference evapotranspiration (ETo) from pan evaporation (Epan). In this paper, the approaches proposed by Cuenca (Irrigation system design: an engineering approach. Prentice-Hall, Englewood Cliffs, 1989), Snyder (J Irrig Drain Eng 118(6):977–980, 1992), Orang (Potential accuracy of the popular non-linear regression equations for estimating pan coefficient values in the original and FAO-24 tables. Unpublished Report, Calif. Dept. of Water Resources, Sacramento, 1998), Raghuwanshi and Wallender (J Irrig Drain Eng 118 (6):977–980, 1998) and Pereira et al. (Agric Water Manage 76:75–82, 1995) were evaluated for a semi-arid region. By comparing with the FAO 56 Penman-Monteith (F-PM) method the Snyder (J Irrig Drain Eng 118(6):977–980, 1992, 1992) approach was best suited for the semi-arid region.
引用
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页码:169 / 175
页数:6
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