Show simple item record

dc.creatorMerchán Elena, Danieles_ES
dc.creatorLuquin Oroz, Eduardo Adriánes_ES
dc.creatorHernández García, Ikeres_ES
dc.creatorCampo Bescós, Miguel Ángeles_ES
dc.creatorGiménez Díaz, Rafaeles_ES
dc.creatorCasalí Sarasíbar, Javieres_ES
dc.creatorValle de Lersundi, Jokin deles_ES
dc.description.abstractDissolved 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. In this study, the dynamics of DS and SS concentrations and loads were assessed in five small watersheds covering representative agricultural land uses in Navarre (Spain). To this end, discharge, DS and SS concentration data were collected during ten hydrological years at each watershed outlet, and loads were computed from discharge and concentration values. DS concentration followed a seasonal pattern imposed by the availability of water, with higher concentrations recorded in low-flow periods and lower concentration in the high-flow period. SS concentration was extremely variable, with a range of 2–4 orders of magnitude in concentration for any specific discharge. Temporal variations (both intra- and inter-annual) in DS loads were explained by differences in runoff, whereas those of SS were not, being the SS loads associated mainly with specific high flow events. These temporal patterns were observed for both agricultural (this study) and non-agricultural (literature) watersheds. From the data in the Navarrese watersheds and those available in the literature, we inferred that agricultural land use, in general, tends to increase the concentration of both DS and SS. Regarding DS and SS yields, the effects of agricultural land use on DS yields are controlled by the changes in runoff rather than the (small) changes in DS concentration. In this sense, land uses changes expected to increase runoff (i.e., a shift from forested to arable or from rainfed to irrigated agriculture) would increase DS yields. On the other hand, agricultural land use tends to increase SS yields, although the effect is highly variable depending on site-specific factors, both natural (e.g., watershed shape) and anthropogenic (e.g., degree of soil conservation practices). In the Navarrese watersheds, DS yields ranged from 1.1 to 2.2 Mg ha−1 year−1 whereas SS yields ranged from 0.3 to 4.3 Mg ha−1 year−1. DS yields seem to dominate under non-agricultural conditions and in most agricultural land uses at the small watershed scale. On the other hand, SS yields dominate in watersheds with increased soil erosion as a consequence of arable land use over erosion-prone watersheds.en
dc.description.sponsorshipThis work received funding from “Ministerio de Economía y Competitividad” via the Research Project CGL2015-64284-C2-1-R and support to D. Merchán (“Juan de la Cierva - Formación” program, FJCI-2015-24920) and I. Hernández García (FPI program, BES-2016-078786). E. Luquin was funded by a scholarship from the Public University of Navarre.en
dc.relation.ispartofCatena, 173 (2019) 114-130en
dc.rights© 2018 Elsevier B.V. The manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.subjectSolute dynamicsen
dc.subjectSediment dynamicsen
dc.subjectFlux of solutesen
dc.subjectFlux of suspended matteren
dc.subjectLand useen
dc.titleDissolved solids and suspended sediment dynamics from five small agricultural watersheds in Navarre, Spain: a 10-year studyen
dc.typeArtículo / Artikuluaes
dc.contributor.departmentUniversidad Pública de Navarra. Departamento de Ingenieríaes_ES
dc.contributor.departmentNafarroako Unibertsitate Publikoa. Ingeniaritza Sailaeu
dc.contributor.departmentUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. ISFOOD - Institute for Innovation and Sustainable Development in Food Chaines_ES
dc.rights.accessRightsAcceso embargado / Sarbidea bahitua dagoes
dc.type.versionVersión aceptada / Onetsi den bertsioaes
dc.contributor.funderUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoaes

Files in this item


This item appears in the following Collection(s)

Show simple item record

© 2018 Elsevier B.V. The manuscript version is made available under the CC BY-NC-ND 4.0 license.
Except where otherwise noted, this item's license is described as © 2018 Elsevier B.V. The manuscript version is made available under the CC BY-NC-ND 4.0 license.