Now showing items 1-9 of 9

    • Dissolved solids and suspended sediment dynamics from five small agricultural watersheds in Navarre, Spain: a 10-year study 

      Merchán Elena, Daniel Upna; Luquin Oroz, Eduardo Adrián; Hernández García, Iker; Campo Bescós, Miguel Ángel Upna; Giménez Díaz, Rafael Upna; Casalí Sarasíbar, Javier Upna; Valle de Lersundi, Jokin del (Elsevier, 2019)   Artículo / Artikulua
      Dissolved solids (DS) and suspended sediment (SS) loads are considered relevant environmental problems. They are related to a wide range of on-site and off-site impacts, such as soil erosion or salinization of water bodies. ...
    • Runoff, nutrients, sediment and salt yields in an irrigated watershed in southern Navarre (Spain) 

      Merchán Elena, Daniel Upna; Casalí Sarasíbar, Javier Upna; Valle de Lersundi, Jokin del; Campo Bescós, Miguel Ángel Upna; Giménez Díaz, Rafael Upna; Preciado, Beatriz; Lafarga, Alberto (Elsevier, 2018)   Artículo / Artikulua
      The environmental impact of irrigated agriculture on water quality was assessed in Landazuria watershed (Navarre, northeast Spain), a 479.5 ha watershed with 53% of irrigated agricultural land. In the framework of a long-term ...
    • Comparison between capacitive and microstructured optical fiber soil moisture sensors 

      López Aldaba, Aitor Upna; López Torres, Diego Upna; Campo Bescós, Miguel Ángel Upna; López Rodríguez, José Javier; Yerro Lizarazu, David; Elosúa Aguado, César Upna; Arregui San Martín, Francisco Javier Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Soil moisture content has always been an important parameter to control because it is a deterministic factor for site-specific irrigation, seeding, transplanting, and compaction detection. In this work, a discrete sensor ...
    • Assessing hillslope-channel connectivity in an agricultural catchment using rare-earth oxide tracers and random forests models 

      Masselink, Rens Hein; Temme, A. J. A. M.; Giménez Díaz, Rafael Upna; Casalí Sarasíbar, Javier Upna; Keesstra, S. D. (Universidad de la Rioja, 2017)   Artículo / Artikulua  OpenAccess
      Soil erosion from agricultural areas is a large problem because of off-site effects like the rapid filling of reservoirs. To mitigate the problem of sediments from agricultural areas reaching the channel, reservoirs and ...
    • Influence of surface roughness measurement scale on radar backscattering in different agricultural soils 

      Martínez de Aguirre Escobar, Alejandro Upna; Álvarez Mozos, Jesús Upna; Lievens, Hans; Verhoest, Niko E. C. (IEEE, 2017)   Artículo / Artikulua
      Soil surface roughness strongly affects the scattering of microwaves on the soil surface and determines the backscattering coefficient (σ 0 ) observed by radar sensors. Previous studies have shown important scale issues ...
    • Influence of surface roughness sample size for C-band SAR backscatter applications on agricultural soils 

      Martínez de Aguirre Escobar, Alejandro Upna; Álvarez Mozos, Jesús Upna; Lievens, Hans; Verhoest, Niko E. C.; Giménez Díaz, Rafael Upna (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      Soil surface roughness determines the backscatter coefficient observed by radar sensors. The objective of this letter was to determine the surface roughness sample size required in synthetic aperture radar applications and ...
    • Assessing soil properties controlling interrill erosion: an empirical approach under Mediterranean conditions 

      Ollobarren del Barrio, Paul; Giménez Díaz, Rafael Upna; Campo-Bescós, Miguel Upna (Wiley, 2017)   Artículo / Artikulua  OpenAccess
      Soil erodibility is a complex phenomenon that comprises a number of different soil properties. However, most current (empirical) erodibility indices are based on only a few soil properties. A feasible soil characterization ...
    • Assessment of soil factors controlling ephemeral gully erosion on agricultural fields 

      Ollobarren Del Barrio, Paul; Campo-Bescós, Miguel Upna; Giménez Díaz, Rafael Upna; Casalí Sarasíbar, Javier Upna (Wiley, 2017)   Artículo / Artikulua  OpenAccess
      The soil factor is crucial in controlling and properly modeling the initiation and development of ephemeral gullies (EGs). Usually, EG initiation has been related to various soil properties (i.e. sealing, critical shear ...
    • Mid-infrared spectroscopy (MIR) for simultaneous determination of fat and protein content in meat of several animal species 

      Lozano Saiz, María; Rodríguez Ulibarri, Pablo Upna; Echeverría Morrás, Jesús Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna; Beriain Apesteguía, María José Upna (Springer, 2017)   Artículo / Artikulua  OpenAccess
      The aim of this research was to study the application of MIR spectroscopy as an alternative to conventional methods to determine fat and protein content. Samples of the main species used to produce meat products were ...