Measuring and modelling sell evaporation in wheat crops

被引：25

作者：

Denmead, OT

Dunin, FX

Leuning, R

Raupach, MR

机构：

[1] CSIRO Ctr. for Environ. Mechanics, Canberra, ACT 2601

[2] CSIRO Division of Plant Industry, Canberra, ACT 2601

来源：

PHYSICS AND CHEMISTRY OF THE EARTH, VOL 21, NO 3, MAY 1996: SOIL-VEGETATION-ATMOSPHERE TRANSFER AT DIFFERENT SCALES | 1996年 / 21卷 / 03期

关键词：

D O I：

10.1016/S0079-1946(97)85567-X

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Soil evaporation is often an important component of the total water loss from plant canopies, but is poorly estimated in many SVAT models. This paper reports the use of micrometeorological and lysimetric methods to measure soil evaporation (E-s) in the canopy of a wheat crop over a period of 7 weeks as the crop matured and green leaf area index (L) declined from 3.8 to 0.2. Simultaneous measurements of total canopy evaporation (E) were made by eddy correlation. The within-canopy micrometeorological methods employed a variance ratio approach and an inverse Lagrangian analysis. The pooled micrometeorological and lysimetric data conformed very well to the relationship E-s/E = exp(-0.61L) with an r(2) value of 0.95. The relationship should be a useful empirical means for estimating daily or weekly E-s in SVAT studies. (C) 1997 Elsevier Science Ltd.

引用

页码：97 / 100

页数：4

共 9 条

[1]

Condon A.G., Richards R.A., Exploiting genetic variation in transpiration efficiency in wheat - An agronomic view, Stable Isotopes and Plant Carbon/Water Relations, pp. 435-450, (1993)

[2]

Coppin P.A., Taylor K.J., A three component sonic anemometer/thermometer system for general micrometeorological research, Boundary-layer Meteorol., 27, pp. 27-42, (1983)

[3]

Denmead O.T., Plant physiological methods for studying evapotranspiration: Problems of telling the forest from the trees, Agric. Water Manage., 8, pp. 167-189, (1984)

[4]

Denmead O.T., Novel meteorological methods for measuring trace gas fluxes, Phil. Trans. R. Soc. Lond. A, 351, pp. 383-396, (1995)

[5]

Denmead O.T., Raupach M.R., Methods for measuring atmospheric gas transport in agricultural and forest systems, ASA Spec. Publ., 55, pp. 19-43, (1993)

[6]

Leuning R., Condon A.G., Dunin F.X., Zegelin S., Denmead O.T., Rainfall interception and evaporation from soil below a wheat canopy, Agric. For. Meteorol., 67, pp. 221-238, (1994)

[7]

Raupach M.R., Applying Lagrangian fluid mechanics to infer scalar source distributions from concentration profiles in plant canopies, Agric. For. Meteorol., 47, pp. 85-108, (1989)

[8]

Weaver H.L., Temperature and humidity flux-variance relations determined by one-dimensional eddy correlation, Boundary-layer Meteorol., 53, pp. 77-91, (1990)

[9]

Webb E.K., Pearman G.I., Leuning R., Correction of flux measurements for density effects due to heat and water vapour, Quart. J. Roy. Meteorol. Soc., 106, pp. 85-100, (1980)

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