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Progress in developing a process-based model linked to a geographical information system for soil salinity assessment at basin scale: the GIS-SALTIRSOIL model

AuthorsPaz Bécares, José Miguel de; Visconti Reluy, Fernando ; Molina, M. J. ; Ingelmo Sánchez, Florencio ; Llinares, J. V.; Tellols, Lourdes ; Soriano, Pilar; Sánchez, J.
Issue DateAug-2008
PublisherEuropean Confederation of Soil Science Societies
CitationEUROSOIL 2008
AbstractThe GIS-SALTIRSOIL model is being developed in the framework of a project for soil salinity state and risk appraisal in Mediterranean agricultural areas. SALTIRSOIL calculates the composition of the soil solution, mainly saturation extract, given an irrigation water composition and amount, crop type, climate features and basic physical and chemical soil data. The lower Palancia river basin, in the limit between València and Castelló provinces in Spain, was selected as study area in order to test the model. This agricultural area is interesting because several factors that cause soil salinization, such as high evapotranspiration to rainfall ratios and high salinity irrigation waters, meet. Five experimental plots have been monitored in this area since late spring 2007. The plots were selected in order to test SALTIRSOIL under the four combinations resulting from the following two factors: irrigation water salinity: low or high, and irrigation technique: drip or basin. Soil sampling in different places within the plots, four depths down to 90 cm and throughout the year has been performed, and saturated soil pastes prepared and analysed, in order to have a representative soil salinity dataset from each plot. Irrigation waters have also been sampled and analysed regularly. Furthermore, soil solution ceramic vacuum extractors have been installed at three depths (30, 60 and 90cm) at the water inlet and outlet in basin irrigated plots and close to selected drip emitters in those drip irrigated. Soil solution from these vacuum extractors has been sampled and analysed every time an irrigation or rainfall event has occurred. In addition to this, a broad soil survey has been performed in the whole basin using a salinity sensor based on frequency-domain reflectometry in order to upscale SALTIRSOIL from the plot to the basin scale, that is to test the GISSALTIRSOIL model once is linked.
DescriptionPoster presentado en EUROSOIL 2008 celebrado en Viena (Austria) del 25 al 29 de agosto de 2008
Appears in Collections:(CIDE) Comunicaciones congresos
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