Memorias de investigación
Ponencias en congresos:
Improving simulation of soil water balance using lysimeter observations in a semiarid climate
Año:2013
Áreas de investigación
  • Ingenierías
Datos
Descripción
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.
Internacional
No
Nombre congreso
Zona no saturada del suelo 2013
Tipo de participación
960
Lugar del congreso
Lugo (España)
Revisores
Si
ISBN o ISSN
978-84-616-6234-0
DOI
Fecha inicio congreso
06/11/2013
Fecha fin congreso
08/11/2013
Desde la página
77
Hasta la página
84
Título de las actas
Estudios en la Zona No Saturada del Suelo Vol. XI ZNS?13
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Maria Soldevilla Martinez UPM
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Centro o Instituto I+D+i: Centro de Estudios e Investigación para la Gestión de Riesgos Agrarios Medioambientales (CEIGRAM). Centro Mixto UPM-AGROMUTUA-ENESA