Soil variability in La Violada Irrigation District (Spain): II Characterizing hydrologic and salinity features

摘要: Abstract The recent modernization of 1.1 Mha irrigated land in Spain calls for the evaluation these transformations terms environmental impact and resource use efficiency. available data this has increased with transformation (better, digital spatially distributed data) allowing soil water solute movement models. But most hydrological models require hydrologic properties that are costly time-consuming to gather information is generally scarce. This paper focuses analyzing features La Violada Irrigation District (VID; a 5234 ha semi-arid area recently modernized northeast Spain) usable new irrigation system. map VID (presented companion paper) gathered salinity horizons described units. hydraulic conductivity (Ks) was also assessed by inverse auger-hole method. From data, disaggregated three homogeneous units according their Pedotransfer Functions (PTFs) were built whole (General Model) separately (Distributed Model). These PTFs allowed obtaining field capacity (FC) wilting point (WP) from texture organic matter, while Ks depended upon gypsum content. Apparently, there no issues soils due irrigation. high Ca2 + Mg2 + levels saturation extract resulted low SAR, what along carbonate contents may help prevent degradation sodicity. As result, zones defined be used recommend specific practices as basis application applied directly inputs allow setting adequate parameters nearby areas similar more readily (texture, matter gypsum).