Digital map of intrinsic vulnerability of groundwater in the Segura Hydrographic District (Spain) based on the IV Index [Raster map]

DOWNLOAD THE MAP HERE: https://doi.org/10.5281/zenodo.15124192 This digital map pertains to the paper: Arauzo, M., Valladolid, M. & Andries, D.M. (2025) Mapping groundwater vulnerability to nitrate pollution in the Segura Hydrographic District (Spain) by the LU-IV Procedure. Estudios Geológicos (in press). Here, we present the raster map of INTRINSIC VULNERABILITY according to the IV Index (IV=Intrinsic Vulnerability) across the groundwater bodies of the Segura Hydrographic District. IV Index is applied as the first step of the LU-IV Procedure (Arauzo, 2017; Arauzo et al. 2019, 2022, 2025). Key specifications: Number of bands: 1. Cell size: 25, 25 m. Format: TIFF. Spatial reference: ETRS_1989_UTM_Zone_30 To generate the map legend, ensure you import the legend's colour code (leyenda_código de color. Lyr) into ArcGIS using Layer Properties/ Symbology/ Import symbology. REFERENCES: Original design, validations and applicability of the LU-IV Procedure (including the IV Index): Arauzo, M. (2017). Vulnerability of groundwater resources to nitrate pollution: A simple and effective procedure for delimiting Nitrate Vulnerable Zones. Science of the Total Environment, 575: 799-812. https://doi.org/10.1016/j.scitotenv.2016.09.139 Improved design of the LU-IV Procedure (including the IV Index): Arauzo, M., García, G., Valladolid, M. (2019). Assessment of the risks of N-loss to groundwater from data on N-balance surplus in Spanish crops: An empirical basis to identify Nitrate Vulnerable Zones. Science of the Total Environment, 696: 133713. https://doi.org/10.1016/j.scitotenv.2019.133713 Arauzo, M., Valladolid, M., Andries, D.M. (2022). Would delineation of nitrate vulnerable zones be improved by introducing a new parameter representing the risk associated with soil permeability in the Land Use–Intrinsic Vulnerability Procedure? Science of the Total Environment, 840: 156654. https://doi.org/10.1016/j.scitotenv.2022.156654 IV Index (first step of the LU-IV Procedure) applied to different territories: Arauzo, M., Valladolid, M., García, G. (2020). Mapping groundwater vulnerability to nitrate pollution from diffuse sources in the Ebro river basin (N.E. Spain). Estudios Geológicos, 76(2): e132. https://doi.org/10.3989/egeol.43868.586 Salman, A.A., Arauzo, M., Elnazer. A.A. (2019). Groundwater quality and vulnerability assessment in west Luxor Governorate, Egypt. Groundwater for Sustainable Development, 8: 271-280. https://doi.org/10.1016/j.gsd.2018.11.009 Arauzo, M., Valladolid, M., Andries, D.M. (2025). Mapping groundwater vulnerability to nitrate pollution in the Segura Hydrographic District (Spain) by the LU-IV Procedure. Estudios Geológicos (in press). ONE FOLDER INCLUDED: 1. Map of intrinsic vulnerability_IV Index_DEMARCACION SEGURA.zip. It includes the digital map of the intrinsic vulnerability of groundwater in the Segura Hydrographic District in TIFF format (first step of the LU-IV Procedure), the metadata file, a Summary Diagram of the LU-IV Procedure (including the IV Index in step 1) in JPG format, a README.txt file and the legend's colour code file.

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