Evapotranspiration: Concepts and future trends

被引:163
作者
Pereira, LS [1 ]
Perrier, A
Allen, RG
Alves, I
机构
[1] Inst Super Agron, Lisbon, Portugal
[2] Inst Natl Agron Paris Grignon, Paris, France
[3] Univ Idaho, Res & Extens Ctr, Kimberly, ID 83341 USA
关键词
D O I
10.1061/(ASCE)0733-9437(1999)125:2(45)
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Past research on evapotranspiration has provided sound theoretical knowledge and practical applications that have been validated through field measurements. Many different approaches have been used; however, when primary concepts and standard definitions are accepted, it is possible to find reasonable agreement among methods. This paper reviews such approaches, from Penman to Penman-Monteith. The standard concepts of potential evaporation (EP) and equilibrium evaporation (E-e), and the introduction of the climatic resistance (r(e)), provide a better understanding of the role of the climate together with surface and aerodynamic resistances (r(s) and r(a)). Therefore, the concept of reference evapotranspiration (ETa), particularly the new one adopted by the Food and Agricultural Organization of the United Nations, can be better understood, as well as its limitations. Crop evapotranspiration (ETc) is related to both ETa and E-e. Crop coefficients (K-c) can be shown to have two components, alpha(o) and alpha(c), with K-c = alpha(o)alpha(c). The alpha(o) is a function of the climatic resistance and of the aerodynamic resistances of the crop and of the reference crop. The alpha(c) is a function of both surface and aerodynamic resistances of the crop and of the reference crop. From this analysis some ideas on future developments result that are directed toward providing compatibility between the one- and two-step calculation of ETc.
引用
收藏
页码:45 / 51
页数:7
相关论文
共 40 条
[21]  
MONTEITH JL, 1973, PRINCIPLES ENV PHYSI
[22]   NATURAL EVAPORATION FROM OPEN WATER, BARE SOIL AND GRASS [J].
PENMAN, HL .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1948, 193 (1032) :120-&
[23]  
PERRIER A, 1975, ANN AGRON, V26, P229
[24]   FIELD-STUDY OF ACTUAL EVAPO-TRANSPIRATION OF A CORN CROP [J].
PERRIER, A ;
KATERJI, N ;
GOSSE, G ;
ITIER, B .
AGRICULTURAL METEOROLOGY, 1980, 21 (04) :295-311
[25]  
Perrier A., 1982, LAND SURFACE PROCESS, P395
[26]  
PERRIER A, 1977, METEOROLOGIE PARIS, V6, P7
[27]   EVAPOTRANSPIRATION AND CANOPY TEMPERATURE OF RICE AND GROUNDNUT IN SOUTHEAST COASTAL INDIA - CROP COEFFICIENT APPROACH AND RELATIONSHIP BETWEEN EVAPOTRANSPIRATION AND CANOPY TEMPERATURE [J].
PETERSCHMITT, JM ;
PERRIER, A .
AGRICULTURAL AND FOREST METEOROLOGY, 1991, 56 (3-4) :273-298
[28]  
Price D.T., 1989, ESTIMATION AREAL EVA, P213
[29]  
Quinn F.H., 1996, HDB HYDROLOGY, P125
[30]  
Ritchie J.T, 1974, P IRR DRAIN SPEC C A, P262