
DR. SAMUEL ORTEGA-FARIAS
Profesor Titular PhD, Universidad de Oregon, EEUU Magíster en Ingeniería en Riego, Universidad de Oregon, EEUU In. Agrónomo, Universidad Católica de Chile


Línea de Investigación
Soy director del Centro de Investigación y Transferencia en Riego y Agroclimatología (CITRA) de la Universidad de Talca, donde realiza actividades de docencia e investigación en las áreas de la gestión sustentable de los recursos hídrico, modelamiento bio-matemático, agroclimatología y percepción remota. Para adaptar la agricultura a futuros escenarios de sequía y cambio climático implementamos un Sistema Integral para la Gestión Hídrica (SIGESH), cuyo objetivo es optimizar el uso de agua y energía en frutales, viñas y cultivos. En estos sistemas agrícolas, los impactos de SIGESH se han traducido en ahorros de agua y energía entre un 30 y 60%.
Publicaciones (últimos cinco años) / Researchgate
Ortega-Farias, S. and Riveros-Burgos, C. 2019. Modeling phenology 1 of four grapevine cultivars (Vitis vinifera L.) in Mediterranean climate conditions. Scientia Horticulturae, 250:38-44.
Ahumada‑Orellana, L., Ortega‑Farías, S., Poblete‑Echeverría, C. and Searles, PS. 2019. Estimation of stomatal conductance and stem water potential threshold values for water stress in olive trees (cv. Arbequina). https://doi.org/10.1007/s00271-019-00623-9.
del Pozo, A., Brunel-Saldias, N., Engler, A., Ortega-Farias, S., Acevedo-Opazo, C. Lobos, GA., Jara-Rojas, R., and Molina-Montenegro, M. 2019. Climate Change Impacts and Adaptation Strategies of Agriculture in Mediterranean-Climate Regions (MCRs). Sustainability, 11, 2769; doi:10.3390/su11102769.
Riveros-Burgos, C., Ortega-Farias, S., López-Olivari, R., and Chávez, JL. 2019. Parameterization of a clumped model to directly simulate actual evapotranspiration over a superintensive drip-irrigated olive orchard. Journal of Hydrometeorology. https://doi.org/10.1175/JHM-D-18-0135.1
Kustas, WP., Agam, N. and Ortega-Farias, S. 2019. Forward to the GRAPEX special issue. Irrigation Science, 37:221–226. https://doi.org/10.1007/s00271-019-00633-7
Poblete, T., Ortega-Farías, S.* and Ryu, D. 2018. Automatic Coregistration Algorithm to Remove Canopy Shaded Pixels in UAV-Borne Thermal Images to Improve the Estimation of Crop Water Stress Index of a Drip-Irrigated Cabernet Sauvignon Vineyard. Sensors 18: 397; doi:10.3390/s18020397.
Ahumada-Orellana1, L., Ortega-Farías. S*., and Searles, P. 2018. Olive oil quality response to irrigation cut-off strategies in a super-high density orchard. Agric. Water Man., 102: 81-88. https://doi.org/10.1016/j.agwat.2018.02.008.
Fuentes-Peñailillo, F., Ortega-Farías, S., Acevedo-Opazo, C., and Fonseca-Luengo, D. 2018. Implementation of a Two-Source Model for Estimating the Spatial Variability of Olive Evapotranspiration Using Satellite Images and Ground-Based Climate Data. Water, 10: 339. doi:10.3390/w10030339.
Zúñigaª,M., Ortega-Faríasª,S., Fuentes, S., Riveros-Burgos, C., and Poblete-Echeverría, P. 2018. Effects of three irrigation strategies on gas exchange relationships, plant water status, Yield components and Water Productivity on Grafted Carménère Grapevines. Front. Plant Sci., 9: 992. 12 July 2018 | https://doi.org/10.3389/fpls.2018.00992.
Jara-Rojas, J., Engler, A., Adasme-Berríos, C., Carrasco-Benavides, C., Ortega-Farias, S., and Mediavilla, W. 2018. Adoption of irrigation scheduling: Role of extension and training en Central Chile. Environmental Engineering & Management Journal (EEMJ), 17: 2873-2880.
Riveros-Burgos, C., Ortega-Farías, S. and Ahumada-Orellana, L. 2018. Assessment of olive transpiration derived from a remote sensing energy balance model compared with sap flow measurements. Acta Hortic. 1222. ISHS 2018. DOI 10.17660/ActaHortic.2018.1222.25
F. Fuentes-Peñailillo, S. Ortega-Farías, M. Rivera, M. Bardeen and M. Moreno. 2018. Comparison of vegetation indices acquired from RGB and Multispectral sensors placed on UAV. ICA-ACCA:1-6, October 17-19, 2018, Greater Concepción, Chile. 978-1-5386-5586-3/18/$31.00, IEEE
Fuentes-Peñailillo, F., Ortega-Farías, S., Rivera, M., Bardeen, M. and Moreno, M. 2018. Using clustering algorithms to segment UAVbased RGB images. 978-1-5386-5586-3/18, IEEE.
Lobos, T., Retamales, J., Ortega‑Farías, S., Hanson, E., López‑Olivari, R. and Mora, M. 2018. Regulated deficit irrigation effects on physiological parameters, yield, fruit quality and antioxidants of Vaccinium corymbosum plants cv. Brigitta. Irrig. Sci. 36: 49-60. https://doi.org/10.1007/s00271-017-0564-6
Morales-Salinas, L., Ortega-Farías, S.*, Riveros-Burgos, C., Neira-Román, J., Carrasco-Benavides, M., and López-Olivari, R. 2017. Monthly Calibration of Hargreaves–Samani Equation Using Remote Sensing and Topoclimatology in Central-Southern Chile. http://dx.doi.org/10.1080/01431161.2017.1323287.
Carrasco-Benavides, M., Ortega-Farias, S.*, Morales-Salinas, L., Poblete-Echeverría, C., and Chávez, JL. 2017. Calibration and Validation of an Aerodynamic Method to Estimate the Spatial Variability of Sensible and Latent Heat Fluxes Over a Drip-Irrigated Merlot Vineyard. http://dx.doi.org/10.1080/01431161.2017.1317943.
de la Fuente-Sáiz, D., Ortega-Farías, S.*, Fonseca, D., Ortega-Salazar, S., Kilic, A., and Allen, R. 2017. Calibration of METRIC Model to Estimate Energy Balance over a Drip-Irrigated Apple Orchard. Remote Sens. 9: 670; doi: 10.3390/rs9070670.
Ahumada-Orellana1, L., Ortega-Farías. S*., Searles, P., and Retamales, J. 2017. Yield and Water Productivity Responses to Irrigation Cut-off Strategies after Fruit Set Using Stem Water Potential Thresholds in a Super-High Density Olive Orchard. Frontiers in Plant Science, 8: 1280. doi: 10.3389/fpls.2017.01280.
Poblete, T., Ortega-Farías, S.*, Moreno, MA., and Bardeen, M. 2017. Artificial neural network to predict vine water status spatial variability using multispectral information obtained from an unmanned aerial vehicle (UAV). Sensors. 11: 2490; doi:10.3390/s17112490.
Ortega-Farías, S., Ortega-Salazar, S., Poblete, T., Poblete-Echeverría, C., Zúñiga, M., Sepúlveda-Reyes, D., Kilic, A. and Allen, R. 2017. Estimation of olive evapotranspiration using multispectral and thermal sensors placed aboard an unmanned aerial vehicle. Acta Hort. (ISHS) 1150:1-8.
Poblete-Echeverría, C., Sepúlveda-Reyes, D., Zúñiga, M. and Ortega-Farías, S. 2017. Grapevine crop coefficient (Kc) determined by surface renewal method at different phenological periods. Acta Hort. (ISHS) 1150:61-66.
López-Olivari, R., Fuentes, S., and Ortega-Farı́as, S. 2017. Seasonal variation of night-time sap flow of a Young olive orchard: the unconsidered process for evapotranspiration estimations. Acta Hort. (ISHS) 1150: 81-86
López-Olivari, R., Ortega-Farías, S. and Poblete-Echeverría, C. 2017. Energy balance components and evapotranspiration measurements over a superintensive olive orchard. Acta Hort. (ISHS) 1150:55-60
de la Fuente-Sáiz, D., Ortega-Farías, S., Ortega-Salazar, S., Carrasco-Benavides, M., Kilic, A. and Allen, R. 2017. Estimation of water requirements for a drip-irrigated apple orchard using Landsat 7 satellite images. Acta Hort. (ISHS) 1150:181-188.
Zúñiga, M., Poblete-Echeverría, C., Riveros, C. and Ortega-Farías, S. 2017. Water stress integral as indicator of grape quality and yield parameters in a ‘Carménère’ vineyard with regulated deficit irrigation. Acta Hort. (ISHS) 1150:501-506.
Ortega-Farías, S., Fonseca, D-. de la Fuente-Sáiz, D., Kilic, A., Ortega-Salazar, S., Allen, R. and Carrasco-Benavides, M. 2017. Remote sensing model to evaluate the spatial variability of vineyard water requirements. Acta Hortic. (ISHS) 1188: 235-242. DOI 10.17660.
Verdugo-Vásquez, N., Pañitrur-De la Fuente, C., Ortega-Farías, S*. 2017. Model development to predict phenological scales of table grapes (cvs. Thompson, Crimson and Superior Seedless and Red Globe) using growing degree days. OENO One, 51: 3. DOI: http://dx.doi.org/10.20870/oeno-one.2017.51.2.1833.
López-Olivari1, R., Ortega-Farías, S. and Poblete-Echeverría, C. 2016. Partitionning of net radiation and evapotranspiration over a superintensive drip-irrigated olive orchard. Irrig. Sci., 34 (1): 17-31.
Odi-Lara, M., Campos. I., Neale, CMU., Ortega-Farías, S., Poblete-Echeverría, C., Balbontín, C., and Calera, A. 2016. Estimating Evapotranspiration of an Apple Orchard Using a Remote Sensing-Based Soil Water Balance. Remote Sens., (8) 253-273.
Lobos, T.E., Retamales, J.B., Ortega-Farías, S., Hanson, E.J., López-Olivari, R., and Mora, M.L. 2016. Pre-harvest regulated deficit irrigation management effects onpost-harvest quality and condition of V. corymbosum fruits cv. Brigitta. Scientia Horticulturae 207 (2016) 152–159.
Carrasco-Benavidesa1, M., Mora, C., Maldonado, G., Olguín-Cáceres, J., von Bennewitza, E., Ortega-Farías, S., Gajardo, J., and Fuentes, S. 2016. Assessment of an automated digital method to estimate leaf area index (LAI) in cherry tres. New Zealand Journal of Crop & Horticultural Science. 0114-0671 (Print) 1175-8783; http://dx.doi.org/10.1080/01140671.2016.1207670.
Ortega-Farías, S., Ortega-Salazar, S., Poblete, T., Kilic, A., Allen, R., Poblete-Echeverría, C., Ahumada-Orellana, L., Zuñiga, M. and Sepúlveda, D. 2016. Estimation of Energy Balance Components over a Drip-Irrigated Olive Orchard Using Thermal and Multispectral Cameras Placed on a Helicopter-Based Unmanned Aerial Vehicle (UAV). Remote Sens. 8(8), 638; doi:10.3390/rs8080638.
Jara-Rojas, R. Engler, A., Adasme-Berrios, C., Carrasco-Benavides, M., Ortega-Farías, S., and Mediavilla, W. 2016. Adoption of irrigation scheduling: Role of extension and training in Central Chile. Environmental Engineering and Management Journal. Acepted
Souza, P., Rodrigues, J., Sousa, A., Lima, R., Rocha, E., and Ortega-Farias, S. 2016. Water Requirement Estimate for the Reproductive Period of Mango Orchards in the Northeast of the State of Pará, Brazil. Rev. Bras. Frutic., Jaboticabal – SP, 38: 311-314. http://dx.doi.org/10.1590/0100-29452016311.
Sepúlveda-Reyes, D., Ingram, B., Bardeen, M., Zúñiga, M., Ortega-Farías, S., and Poblete-Echeverría, C. 2016. Selecting Canopy Zones and Thresholding Approaches to Assess Grapevine Water Status by Using Aerial and Ground-Based Thermal Imaging. Remote Sens. 8, 822; doi: 10.3390/rs8100822.
Poblete-Echeverría, C., Fuentes, S., Ortega-Farias, S., Gonzalez-Talice, J., and Yuri. 2015. Digital Cover Photography for Estimating Leaf Area Index (LAI) in Apple Trees Using a Variable Light Extinction Coefficient. Sensors 15, 2860-2872; doi:10.3390/s150202860.
Jara-Rojas, F., Ortega-Farías, S., Valdés-Gómez, H., Acevedo-Opazo, C. 2015. Gas exchange relations of ungrafted grapevines (Carménère) growing under irrigated field conditions. South African Journal of Enology and Viticulture. S. Afr. J. Enol. Vitic., 36(2):231-242
López-Olivari, R., Ortega-Farías, S., Morales, L., and Valdés, H. 2015. Evaluation of three semi-empirical approaches to estimate the net radiation over a drip-irrigated olive orchard. Chilean J. Agric. Res. 75 (03): 341-349.
Proyectos Vigentes
Calibration of two-source models to estimate vineyard water requirements using ground-based weather measurements and high-resolution thermal and multispectral images acquired by an unmanned aerial vehicle (UAV). FONDECYT1160997. Inv. Principal: abril 2016-marzo 2019.
Programa de Mejoramiento de la Gestión Hídrica para Usuarios Agrícolas en la Cuenca del Rio Maule. ENEL Generación Chile, S.A. Director: octubre 2017-octubre 2019
Mapa dinámico a escala diaria de la Evapotranspiración de Referencia (ETo) para determinar las necesidades de riego en Chile”. FIA. Director: diciembre 2017-diciembre 2019.
Plataforma agrícola satelital para el seguimiento de la determinación de los requerimientos hídricos de los principales cultivos del país”. FIA. Co-investigador: diciembre 2017-diciembre 2019.
Development of water stress energy balance indices of vineyards using meteorological data and high-resolution thermal infrared (TIR) cameras placed on an unmanned aerial vehicle (UAV). FONDECYT1190689. Inv. Principal: abril 2019-marzo 2022.
Incremento de la eficiencia y cuidado del agua mediante experiencia conjunta entre comunidades de Sonora-México y Linares-Chile. ACIDChile y AMEXCID. Inv. Principal: marzo 2019-febrero 2021.