Match!
Paula Paredes
Instituto Superior de Agronomia
EvapotranspirationDeficit irrigationAgronomyCrop coefficientIrrigation
61Publications
19H-index
1,002Citations
What is this?
Publications 62
Newest
#1Paula Paredes (Instituto Superior de Agronomia)H-Index: 19
#2Luis S. Pereira (Instituto Superior de Agronomia)H-Index: 54
Abstract The computation of the reference crop evapotranspiration (ETo) using the FAO Penman-Monteith equation (PM-ETo) requires data on maximum and minimum air temperatures (Tmax, Tmin), vapour pressure deficit (VPD), solar radiation (Rs) and wind speed at 2 m height (u2). However, those data are often not available, or data sets may be incomplete or have questionable quality. Various procedures were proposed in FAO56 to overcome these limitations and an abundant literature has been and is bein...
Source
#1T.A. PaçoH-Index: 11
#2Paula ParedesH-Index: 19
Last. Francisco L. SantosH-Index: 11
view all 5 authors...
The SIMDualKc model was used to simulate crop water requirements for a super high density olive orchard in the region of Alentejo, Portugal. This model uses the dual crop coefficient approach to estimate and partitioning the actual crop evapotranspiration (ETc act) and therefore to perform the soil water balance. The model was calibrated with 2011 tree transpiration using trunk sap flow measurements and was validated using similar data from 2012 and tested with 2013 data. Low root mean square er...
2 CitationsSource
#1Paula Paredes (IPN: Instituto Politécnico Nacional)H-Index: 19
#2Diogo S. Martins (Instituto Superior de Agronomia)H-Index: 7
Last. Carlos Pires (University of Lisbon)H-Index: 10
view all 5 authors...
Abstract This study aims at assessing the accuracy of estimating daily grass reference evapotranspiration (PM-ETo) computed with ERA-Interim reanalysis products, as well as to assess the quality of reanalysis products as predictors of daily maximum and minimum temperature, net radiation, dew point temperature and wind speed, which are used to compute PM-ETo. With this propose, ETo computed from local observations of weather variables in 24 weather stations distributed across Continental Portugal...
2 CitationsSource
#1Paula Paredes (University of Lisbon)H-Index: 19
#2J. C. Fontes (University of the Azores)H-Index: 4
Last. Luis S. Pereira (University of Lisbon)H-Index: 54
view all 4 authors...
Reference crop evapotranspiration (ETo) estimations using the FAO Penman-Monteith equation (PM-ETo) require a set of weather data including maximum and minimum air temperatures (T max, T min), actual vapor pressure (e a), solar radiation (R s), and wind speed (u 2). However, those data are often not available, or data sets are incomplete due to missing values. A set of procedures were proposed in FAO56 (Allen et al. 1998) to overcome these limitations, and which accuracy for estimating daily ETo...
4 CitationsSource
#1Paula Paredes (University of Lisbon)H-Index: 19
#2J. C. Fontes (University of the Azores)H-Index: 4
Last. Luis S. Pereira (University of Lisbon)H-Index: 54
view all 4 authors...
Reference crop evapotranspiration (ETo) estimations using the FAO Penman-Monteith equation (PM-ETo) require several weather variables that are often not available. Then, ETo may be computed with procedures proposed in FAO56, either using the PM-ETo equation with temperature estimates of actual vapor pressure (e a) and solar radiation (R s), and default wind speed values (u 2), the PMT method, or using the Hargreaves-Samani equation (HS). The accuracy of estimates of daily e a, R s, and u 2 is pr...
7 CitationsSource
#1Paula ParedesH-Index: 19
#2G. RodriguesH-Index: 1
Last. Luis S. PereiraH-Index: 54
view all 6 authors...
This study aims to model the impacts of the frequency of cuttings of Tifton 85 bermudagrass on the dynamics of evapotranspiration (ETc) and to derive crop coefficients appropriate for grass water management. Two seasons of experimentation were used with four different cutting treatments which provided field data for calibration and validation of the soil water balance model SIMDualKc for all treatments. Cuttings were performed after the cumulative growth degree days (CGDD) attained 124 °C, 248 °...
4 CitationsSource
#1Paula Paredes (Instituto Superior de Agronomia)H-Index: 19
#2Daniela D'AgostinoH-Index: 7
Last. Luis S. Pereira (Instituto Superior de Agronomia)H-Index: 54
view all 5 authors...
Abstract Two years of experimental field data on potato (var. Spunta) were used to calibrate and validate the SIMDualKc model. This model adopts the FAO dual Kc approach that provides the partition of crop evapotranspiration into crop transpiration and soil evaporation. Results of model calibration show a good agreement between soil water observations and predictions, with low errors of estimate – RMSE 0.87). The calibrated basal crop coefficients for the initial stage, mid-season and end of sea...
7 CitationsSource
#1Paula Paredes (Instituto Superior de Agronomia)H-Index: 19
#2Luis S. Pereira (Instituto Superior de Agronomia)H-Index: 54
Last. Maria Odete Torres (Instituto Superior de Agronomia)H-Index: 8
view all 5 authors...
Aiming at improved knowledge on water use, productivity and irrigation scheduling of processing pea, the soil water balance model SIMDualKc was calibrated and validated using field data observed in two farmers’ fields in a wet and a dry year. The model uses the dual crop coefficient approach for partitioning crop evapotranspiration into crop transpiration and soil evaporation. Calibration was performed by minimizing differences between measured and simulated soil water content with a root mean s...
6 CitationsSource
#1Luis GiménezH-Index: 2
#2Paula ParedesH-Index: 19
Last. Luis S. PereiraH-Index: 54
view all 3 authors...
Data relative to two soybean seasons, several irrigation scheduling treatments, including moderate and severe deficit irrigation, and rain-fed cropping were used to parameterize and assess the performance of models AquaCrop and SIMDualKc, the latter combined with the Stewart’s yield model. SIMDualKc applies the FAO56 dual crop coefficient approach for computing and partitioning evapotranspiration (ET) into actual crop transpiration (Tc act) and soil evaporation (Es), while AquaCrop uses an appro...
10 CitationsSource
#1Diogo S. Martins (Instituto Superior de Agronomia)H-Index: 7
#2Paula Paredes (Instituto Superior de Agronomia)H-Index: 19
Last. Luis S. Pereira (University of Lisbon)H-Index: 54
view all 6 authors...
Computing crop reference evapotranspiration (ETo) with the FAO Penman–Monteith method (PM-ETo) requires maximum and minimum air temperature, shortwave radiation, relative air humidity and wind speed. These data are often not available, thus requiring alternative computation procedures. Although some proposed approximations may provide ETo values with small estimation errors, the physics of the ET processes may then not be well described. The use of reanalysis data, which is common in climate stu...
8 CitationsSource
1234567