000148946 001__ 148946
000148946 005__ 20250123152146.0
000148946 0247_ $$2doi$$a10.1016/j.geomorph.2024.109542
000148946 0248_ $$2sideral$$a142117
000148946 037__ $$aART-2025-142117
000148946 041__ $$aeng
000148946 100__ $$aIbisate, A.
000148946 245__ $$aBedload response to dam removal: Results from a 6-year particle tracking survey in the Leitzaran River (Basque Country)
000148946 260__ $$c2025
000148946 5060_ $$aAccess copy available to the general public$$fUnrestricted
000148946 5203_ $$aDams, weirs and transverse barriers to rivers interrupt sediment continuity and reduce sediment supply downstream. In this regard, dam removal is an increasingly used river restoration measure to recover longitudinal connectivity of sediment, among many other river processes. In this work we present a 6-year (from 2016 to 2022) monitoring of bedload transport before, during and after the removal of the 7-meters high Olloki dam in the Leitzaran River (Basque Country). The removal process started in 2018 with the upper 3 m and was completed in 2019 with the remaining 4 m of the dam. To monitor bedload transport, we seeded RFID-tagged stones in three reaches: a control reach unaffected by the dam, a reach immediately upstream of the dam, and a reach downstream of the dam. We deployed 300 tagged stones each year (100 by reach), i.e., 1800 in total. We measured important mobilization and displacement of tracer stones (with maximum travel distances of ∼8.8 km of tracers seeded upstream the Olloki dam) during an active hydrological year following the complete removal of the dam, with some tagged particles even travelling across a downstream weir. We also reported changes in the progression of tagged stones in the dam-affected reaches (upstream and downstream) with the removal, with further and faster dispersal of sediments once the dam was removed. In addition, in these reaches we estimated larger volumes of mobilized bedload in the three years following removal than in the previous years, especially in the upstream reach. In this regard, the relationship between bedload and cumulated energy suggests that less energy was expended in the upstream reach for mobilizing bedload once the removal of the dam was completed. Conversely, in the control reach no major changes were observed before and after the removal of the dam; this reach showed only an increase in sediment mobilization during the last hydrological year, which was the most hydrologically active of the whole monitoring period. In summary, our tracer observations document that travel distances and mobilization volumes are considerably increased with dam removal, especially once the dam was completely removed.
000148946 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/AEI/PID2022-138196OB-C32
000148946 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000148946 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000148946 700__ $$aGarcía, H.
000148946 700__ $$aVázquez-Tarrío, D.
000148946 700__ $$aSánchez-Pinto, I.
000148946 700__ $$aHerrero, X.
000148946 700__ $$aSáenz de Olazagoitia, A.
000148946 700__ $$0(orcid)0000-0002-9745-5866$$aOllero, A.$$uUniversidad de Zaragoza
000148946 7102_ $$13006$$2430$$aUniversidad de Zaragoza$$bDpto. Geograf. Ordenac.Territ.$$cÁrea Geografía Física
000148946 773__ $$g470 (2025), 109542 [17 pp.]$$pGeomorphology$$tGEOMORPHOLOGY$$x0169-555X
000148946 8564_ $$s7719282$$uhttps://zaguan.unizar.es/record/148946/files/texto_completo.pdf$$yVersión publicada
000148946 8564_ $$s2319935$$uhttps://zaguan.unizar.es/record/148946/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000148946 909CO $$ooai:zaguan.unizar.es:148946$$particulos$$pdriver
000148946 951__ $$a2025-01-23-14:47:34
000148946 980__ $$aARTICLE