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

Soldevilla Martínez, María and López Urrea, L. and Martínez Molina, L. and Lizaso Oñate, Jon Iñaqui and Quemada Saenz-Badillos, Miguel (2013). Improving simulation of soil water balance using lysimeter observations in a semiarid climate.. In: "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.

Description

Title: Improving simulation of soil water balance using lysimeter observations in a semiarid climate.
Author/s:
  • Soldevilla Martínez, María
  • López Urrea, L.
  • Martínez Molina, L.
  • Lizaso Oñate, Jon Iñaqui
  • Quemada Saenz-Badillos, Miguel
Item Type: Presentation at Congress or Conference (Article)
Event Title: XI Jornadas de Investigación en la Zona No Saturada del Suelo
Event Dates: 06/11/2013 - 08/11/2013
Event Location: Lugo (España)
Title of Book: Estudios en la Zona no Saturada del Suelo. ZNS'13
Date: 2013
ISBN: 978-84-616-6234-0
Volume: XI
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Vegetal: Fitotecnia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (246kB) | Preview

Abstract

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.

More information

Item ID: 31119
DC Identifier: http://oa.upm.es/31119/
OAI Identifier: oai:oa.upm.es:31119
Deposited by: Memoria Investigacion
Deposited on: 25 Nov 2014 17:34
Last Modified: 25 Nov 2014 17:34
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM