Assessing HYDRUS-2D model to simulate water content and salt accumulation in a soilirrigated with a subsurface drip system: Application in a semiarid area of centralTunisia

Giuseppe Provenzano, Abdelhamid Boujelben, Khila, Boutheina Douh, Mguidiche

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35 Citazioni (Scopus)

Abstract

In this paper, the suitability of HYDRUS-2D model to predict the average soil water content in the root zone of potato crop irrigated with subsurface drip irrigation plant, is initiallyassessed on the basis of a field study. Then, the model is tested to predict the salt distribution around a buried emitter, when two different water qualities (i.e. electrical conductivity of 1.0 dS m-1 and 4.0 dS m-1), are used during the growing season (treatments T1 and T2). Finally,the soil volume in which salts accumulates, as well as the effects on crop yield is recognizedfor both the considered treatments.The results evidenced that predicted values of average soil water content in the root zone were significantly correlated to those measured in T1 and T2.Moreover, the model can be considered acceptable to predict the average salt concentration in the soil and to evaluate the dynamic of mass-conservative solutes around the emitter. In both the treatments, the salt concentration resulted increasing in the wetting bulb, with a maximum located towards the wetting front and near the soil surface. Despite the slightly higher salt concentrations were obtained in treatment T2 compared to T1, an insignificantly crop yield was recognized.
Lingua originaleEnglish
Numero di pagine16
RivistaIrrigation and Drainage
Volume64
Stato di pubblicazionePublished - 2015

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Soil Science

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