ESTIMATION OF ACTUAL EVAPOTRANSPIRATION FOR MAIZE FIELD IN NORTH CHINA

Lu Houquan; Qian Shuan; Yang Feiyun; Bai Yueming

Vol.14, NO.6, 2003

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2003 > 14(6): 722-728

Lu Houquan, Qian Shuan, Yang Feiyun, et al. Estimation of actual evapotranspiration for maize field in North China. J Appl Meteor Sci, 2003, 14(6): 722-728.

Citation:

Lu Houquan, Qian Shuan, Yang Feiyun, et al. Estimation of actual evapotranspiration for maize field in North China. J Appl Meteor Sci, 2003, 14(6): 722-728.

Lu Houquan, Qian Shuan, Yang Feiyun, et al. Estimation of actual evapotranspiration for maize field in North China. J Appl Meteor Sci, 2003, 14(6): 722-728.

Citation:

Lu Houquan, Qian Shuan, Yang Feiyun, et al. Estimation of actual evapotranspiration for maize field in North China. J Appl Meteor Sci, 2003, 14(6): 722-728.

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ESTIMATION OF ACTUAL EVAPOTRANSPIRATION FOR MAIZE FIELD IN NORTH CHINA

1.
National Meteorological Center, Beijing, 100081
2.
Chinese Academy of Meteorological Sciences, Beijing, 100081

Received Date: 2002-01-08
Rev Recd Date: 2003-03-15
Publish Date: 2003-12-31

Abstract

Abstract

For simplifying the calculation of actual evapotranspiration in cropped field, the soil moisture of the depth from 0 to 300 cm in the maize field and the meteorological observational data in 1999 at Dingxin county in Hebei Province, where is an agrometeorological experiment base of Chinese Academy of Meteorological Sciences, and the soil moisture of the depth from 0 to 50 cm and the meteorological observational data at 5 stations in North China from 1991 to 1995 are used. The possibility that actual evapotranspiration in the maize field is calculated by using a simple reference evapotranspiration model is examined. Prisetley-Taylor modeland FAO Penman-Mentaith (1998) model are compared and the factors impacting on evapotranspiration are discussed. Based on the experimental data and using leaf area coefficient and mean soil relative moisture as the model factors. A formula calculating actual evapotranspiration is made. Evapotranspiration is calculated by this formula, and the soil moisture of the depth from 0 to 50 cm and the meteorological observational data at 8 stations from 1999 to 2000 are applied to validate. The average errors are in the range from 10% to 15% generally.
- Actual evapotranspiration in maize field;
- Simplified evapotranspiration model;
- Leaf area coefficient;
- Relative soil moisture

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References(16)

Figures and Tables

表 1 采用Priestley-Taylor参考蒸散和FAO作物参考蒸散建立的作物系数方程 (15) 中的经验常数和相关系数

表 2 采用观测站资料和Priestley-Taylor参考蒸散和FAO作物参考蒸散建立的作物系数方程 (3) 中的经验常数和相关系数

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