Arid
DOI10.5194/hess-11-1529-2007
Analysis of effective resistance calculation methods and their effect on modelling evapotranspiration in two different patches of vegetation in semi-arid SE Spain
Were, A.; Villagarcia, L.; Domingo, F.; Alados-Arboledas, L.; Puigdefabregas, J.
通讯作者Were, A.
来源期刊HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN1027-5606
EISSN1607-7938
出版年2007
卷号11期号:5页码:1529-1542
英文摘要

Effective parameters are of major importance in modelling surface fluxes at different scales of spatial heterogeneity. Different ways to obtain these effective parameters for their use in meso-scale and GCM models have been studied. This paper deals with patch-scale heterogeneity, where effective resistances were calculated in two patches with different vegetation (Retama sphaerocarpa (L.) Boiss shrubs, and herbaceous plants) using different methods: aggregating soil and plant resistances in parallel, in series or by an average of both. Effective aerodynamic resistance was also calculated directly from patch fluxes. To assess the validity of the different methods used, the Penman-Monteith equation was used with effective resistances to estimate the total lambda E for each patch. The lambda E estimates found for each patch were compared to Eddy Covariance system measurements. Results showed that for effective surface resistances, parallel aggregation of soil and plant resistances led to lambda E estimates closer to the measured lambda E in both patches (differences of around 10%). Results for effective aerodynamic resistances differed depending on the patch considered and the method used to calculate them. The use of effective aerodynamic resistances calculated from fluxes provided less accurate estimates of lambda E compared to the measured values, than the use of effective aerodynamic resistances aggregated from soil and plant resistances. The results reported in this paper show that the best way of aggregating soil and plant resistances depends on the type of resistance, and the type of vegetation in the patch.


类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000251516100001
WOS关键词BOUNDARY-LAYER ; SENSIBLE-HEAT ; AERODYNAMIC CONDUCTANCES ; HETEROGENEOUS SURFACES ; METEOROLOGICAL MODELS ; FLUX MEASUREMENTS ; TURBULENT FLUXES ; SOUTHEAST SPAIN ; LAND SURFACES ; SPARSE CROPS
WOS类目Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Geology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154502
作者单位(1)Univ Granada, Dept Fis Aplicada, E-18071 Granada, Spain;(2)CSIC, Estac Expt Zonas Aridas, Almeria 04001, Spain;(3)Univ Pablo Olavide, Dept Sistemas Fis Quim & Nat, Seville, Spain;(4)Univ Almeria, Dept Biol Vegetal & Ecol, Almeria 04120, Spain;(5)Univ Granada, Ctr Andaluz Medio Ambiente, E-18071 Granada, Spain
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GB/T 7714
Were, A.,Villagarcia, L.,Domingo, F.,et al. Analysis of effective resistance calculation methods and their effect on modelling evapotranspiration in two different patches of vegetation in semi-arid SE Spain[J],2007,11(5):1529-1542.
APA Were, A.,Villagarcia, L.,Domingo, F.,Alados-Arboledas, L.,&Puigdefabregas, J..(2007).Analysis of effective resistance calculation methods and their effect on modelling evapotranspiration in two different patches of vegetation in semi-arid SE Spain.HYDROLOGY AND EARTH SYSTEM SCIENCES,11(5),1529-1542.
MLA Were, A.,et al."Analysis of effective resistance calculation methods and their effect on modelling evapotranspiration in two different patches of vegetation in semi-arid SE Spain".HYDROLOGY AND EARTH SYSTEM SCIENCES 11.5(2007):1529-1542.
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