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
71 2 200 426sortega@utalca.cl
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.