Improving simulation of soil water balance using lysimeter observations in a semiarid climate.

Soldevilla Martínez, María; López Urrea, L.; Martínez Molina, L.; Lizaso Oñate, Jon Iñaqui y Quemada Saenz-Badillos, Miguel (2013). Improving simulation of soil water balance using lysimeter observations in a semiarid climate.. En: "XI Jornadas de Investigación en la Zona No Saturada del Suelo", 06/11/2013 - 08/11/2013, Lugo (España). ISBN 978-84-616-6234-0. pp. 77-84.

Descripción

Título: Improving simulation of soil water balance using lysimeter observations in a semiarid climate.
Autor/es:
  • Soldevilla Martínez, María
  • López Urrea, L.
  • Martínez Molina, L.
  • Lizaso Oñate, Jon Iñaqui
  • Quemada Saenz-Badillos, Miguel
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: XI Jornadas de Investigación en la Zona No Saturada del Suelo
Fechas del Evento: 06/11/2013 - 08/11/2013
Lugar del Evento: Lugo (España)
Título del Libro: Estudios en la Zona no Saturada del Suelo. ZNS'13
Fecha: 2013
ISBN: 978-84-616-6234-0
Volumen: XI
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Producción Vegetal: Fitotecnia [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Water balance simulation in cropping systems is a very useful tool to study how water can be used efficiently. However this requires that models simulate an accurate water balance. Comparing model results with field observations will provide information on the performance of the models. The objective of this study was to test the performance of DSSAT model in simulating the water balance by comparing the simulations with observed measurements. The soil water balance in DSSAT uses a one dimensional ?tipping bucket? soil water balance approach where available soil water is determined by the drained upper limit (DUL), lower limit (LL) and saturated water content (SAT). A continuous weighing lysimeter was used to get the observed values of drainage and evapotranspiration (ET). An automated agrometeorological weather station close to the lisymeter was also used to record the climatic data. The model simulated accurately the soil water content after the optimization of the soil parameters. However it was found the inability of the model to capture small changes in daily drainage and ET. For that reason simulated cumulative values had larger errors as the time passed by. These results suggested the need to compare outputs of DSSAT and some hydrological model that simulates soil water movement with a more mechanistic approach. The comparison of the two models will allow us to find which mechanism can be modified or incorporated in DSSAT model to improve the simulations.

Más información

ID de Registro: 31119
Identificador DC: http://oa.upm.es/31119/
Identificador OAI: oai:oa.upm.es:31119
Depositado por: Memoria Investigacion
Depositado el: 25 Nov 2014 17:34
Ultima Modificación: 25 Nov 2014 17:34
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