Soil evaporation from drip-irrigated olive orchards

Bonachela, S.; Orgaz, F.; Villalobos, Francisco J.; Fereres, E.

doi:10.1007/s002710000030

Cited by 95 publications

(51 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The same applies to the soil resistance. As there were no measured values for evaporation, during the calibration process soil evaporation in the irrigated zone was maintained between the range indicated by Bonachela et al (2001) and Testi et al (2004) for similar conditions of ground cover and wetted area. This yielded 30% ETp for E and 70% ETp for T. Fig.…”

Section: Crop Parameters and Potential Evapotranspirationmentioning

confidence: 99%

Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions

Cameira

Pereira

Ahuja³

et al. 2014

Agricultural Water Management

View full text Add to dashboard Cite

Section: Crop Parameters and Potential Evapotranspirationmentioning

confidence: 99%

Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions

Cameira

Pereira

Ahuja³

et al. 2014

Agricultural Water Management

View full text Add to dashboard Cite

“…'Arbequino') was also different to ascertain whether the model calibration was cultivar-specific. The orchard transpiration was obtained by subtracting the soil evaporation flux [calculated with the model proposed by Bonachela et al (1999Bonachela et al ( , 2001 and disaggregated on an hourly time scale following Porte-Agel et al (2000)] from the hourly evapotranspiration flux (from eddy covariance measurements). Further details on the orchard and the eddy covariance measurements used here for model validation can be found in Testi et al (2004).…”

Section: Experimental Data For Model Validation (Experiments 2)mentioning

confidence: 99%

A model of daily mean canopy conductance for calculating transpiration of olive canopies

Orgaz

Villalobos

Testi

et al. 2007

Functional Plant Biol.

Self Cite

View full text Add to dashboard Cite

We tested the hypothesis that the transpiration (λEp) of high-coupled canopies, such as olive groves, may be calculated on a daily basis with sufficient precision by the Penman–Monteith ‘big leaf’ equation, by a model of bulk daily canopy conductance (gc) capable of scaling for canopy dimension. Given the limited data required, such a model could replace the standard approach (ET0 × Kc) for calculating olive water requirements, enhancing the precision of estimates. We developed a specific model of daily gc for unstressed olive canopies that was calibrated by transpiration measurements obtained by water balance from a 2-year experiment in a mature orchard with λEp ranging from 0.6 (February 1993) to 11.5 (July 1994) MJ m–2 day–1 and where leaf area index (L) changed from 1.25 to 2.5. The model uses the intercepted fraction of daily PAR and a linear function of average daytime temperature. The model was validated with λEp data collected by eddy covariance in a 3-year experiment conducted in a growing orchard that differed in L and cultivar from the one used in the calibration. The gc model, when used in the Penman–Monteith equation, gave very good daily λEp predictions for all seasons during 3 years, ranging from 0.5 (November 1998) to 5.5 (June 2000) MJ m–2 day–1, indicating that the goals of dealing with the dependence of olive gc on L and of simulating the seasonal variations in gc were achieved. A comparison with the Jarvis gc model, calibrated with 2 months of measured gc hourly data, showed that the gc model developed here performed better than the Jarvis model for the 3-year dataset. The exception to this was the period in which the Jarvis model was calibrated. This indicates that (1) the Jarvis model did not account for the seasonal variations in gc of the olive trees; and (2) the spatial and temporal scale assumptions required in the calibration of gc generate seasonal errors in the simulated bulk daily λEp for this crop. The applicability of this bulk gc model is restricted to well watered olive canopies and to the one-layer approach of calculating λEp but it could be adapted to rain-fed canopies in the future.

show abstract

“…At present, there are three methods for estimating evapotranspiration in a cultivated horticultural field, namely the soil water balance method (Michelakis et al, 1994(Michelakis et al, , 1996Palomo et al, 2000), the micrometeorological method (Ferreira et al, 1996;Braun et al, 2000), and the method of combining measurements of soil evaporation with plant transpiration (Moreno et al, 1996;Trambouze, 1996;Trambouze et al, 1998;Bonachela et al, 1999Bonachela et al, , 2001Fernandez et al, 2001;Testi, et al, 2004). The soil water balance, in principle, is a simple method for estimating evapotranspiration.…”

Section: Introductionmentioning

confidence: 99%

Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods

Gong

Kang

Li-min

et al. 2006

Hydrological Processes

View full text Add to dashboard Cite

Abstract:Field experiments were conducted to investigate the effects of leaf area index and soil moisture content on evapotranspiration and its components within an apple orchard in northwest China for 2 years. Evapotranspiration in the non-rainfall period was estimated using two approaches: the soil water balance method based on tube-type time-domain reflection measurements, and sap flow plus micro-lysimeter methods. The two methods were in good agreement, with differences usually less than 10%. The components of evapotranspiration varied with canopy development. During spring and autumn, soil evaporation was dominating as result of low leaf area index. In summer, plant transpiration became significant, with an average transpiration to evapotranspiration ratio of 0Ð87. The crop coefficient K c showed a strong linear dependence on leaf area index. The water stress coefficient K s was around 1Ð0 when soil moisture was above 23% and started to decrease linearly after that. This study demonstrates that prediction of evapotranspiration in apple orchards can be made using the Food and Agriculture Organization's crop coefficient method from commonly available meteorological data in the area.

show abstract

Soil evaporation from drip-irrigated olive orchards

Cited by 95 publications

References 0 publications

Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions

Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions

A model of daily mean canopy conductance for calculating transpiration of olive canopies

Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods

Contact Info

Product

Resources

About