Estimates of Regional Evapotranspiration in Various Surfaces

Liu Jingmiao; Zhou Xiuji; Yu Jinhua; Ding Yuguo

Vol.13, NO.3, 2002

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2002 > 13(3): 288-298

Liu Jingmiao, Zhou Xiuji, Yu Jinhua, et al. Estimates of regional evapotranspiration in various surfaces. J Appl Meteor Sci, 2002, 13(3): 288-298.

Citation:

Liu Jingmiao, Zhou Xiuji, Yu Jinhua, et al. Estimates of regional evapotranspiration in various surfaces. J Appl Meteor Sci, 2002, 13(3): 288-298.

Liu Jingmiao, Zhou Xiuji, Yu Jinhua, et al. Estimates of regional evapotranspiration in various surfaces. J Appl Meteor Sci, 2002, 13(3): 288-298.

Citation:

Liu Jingmiao, Zhou Xiuji, Yu Jinhua, et al. Estimates of regional evapotranspiration in various surfaces. J Appl Meteor Sci, 2002, 13(3): 288-298.

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Estimates of Regional Evapotranspiration in Various Surfaces

Chinese Academy of Meteorological Sciences, Beijing 100081
Nanjing Institute of Meteorology , Nanjing 210044

Received Date: 2001-06-20
Rev Recd Date: 2001-09-11
Publish Date: 2002-06-30

Abstract

Abstract

The Kotoda-Bortan (K-B) model, used for estimating evapotranspiration, is modified. The estimates of evapotranspoiration on various surfaces from the modified model are compared with those from the Kotaoda model, Advection-Aridity model, Eddy-Correlation and Bowen radio methods, based on the data collected in the Yangtze Delta Field Experiment (1999) and the Huaihe River Basin Energy and Water Cycle Experiment (HUBEX, 1998). The results show that the evapotranspiration estimates from the modified model are very close to those from the Eddy-Correlation and Bowen radio methods both for instantaneous and daily emtimations. The modified model has the following advantages: (1) the necessary input data are limited to those easily obtainable from routine meteorological observation, remote sensing technique and geographical information system; (2) it can be used to estimate evapotranspiration not only from arid and semi-surfaces, but also from wet and vegetated surfaces; (3) the results can be given as digitized square-grid maps. Using this model, we estimated evapotranspiration on various surfaces in the Yangtze Delta region (118° – 123° E, 28° – 33° N) in 1995, and the regional average of evapotranspiration is calculated by the weight mean method .
- Evapotranspiratio;
- Inhomogeneous surface;
- Regional average of evapotranspiration

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References(18)

Figures and Tables

图 1 常熟稻田地表面1999 年6 月K-B 、A-A、E-C模式估计的潜热通量的比较

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图 2 BWB 、A-A 、K-B 模式估计的麦田(a)，森林(b)，水面(c)和水稻(d)田地表面潜热通量的比较

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图 3 1999 年6 月13～15 日常熟稻田修改后的K-B模式(R-K-B)和涡动相关法(E-C)估计的潜热通量的比较

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图 4 鲍恩比(BWB)方法，A-A 和修改的K-B 模式(R-K-B)估计不同表面潜热通量的比较

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表 1 涡动相关法，K-B模式和A-A 模式计算常熟农田地表日蒸发散量

表 2 涡动相关法，K-B 模式和A-A 模式对常熟稻田(1999)月蒸发散量估计

表 3 不同方法不同地表面估计的日蒸发散量

表 4 不同季节(月份)f₀ 的拟合经验系数

表 5 涡动相关法，K-B模式和R-K-B模式计算的常熟稻田地表日蒸发量

表 6 不同方法不同地表面估计的日蒸发散量

表 7 1995 年长江三角洲地区土地资源利用信息及各月和年蒸发散量的估计

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