http://hdl.handle.net/10498/6642 Thu, 05 Nov 2026 10:02:56 GMT 2026-11-05T10:02:56Z http://hdl.handle.net/10498/40503 Auction-based comparisons of landings, revenue and price structures between Bonanza (Sanlucar de Barrameda) and Isla Cristina (Gulf of Cadiz, SW Spain) in 2024 Vidal Pérez, Juan Manuel; Chover Serrano, Andrés; Coronil Huertas, Daniel José; Alonso del Rosario, José Juan This study compares landings, revenues, and price structures between two major Andalusian first-sale auctions in the Gulf of Cadiz (SW Spain): Bonanza (Sanlucar de Barrameda) and Isla Cristina. Using 2024 auction records aggregated at the vessel–species level, we analyse how outcomes differ across ports and whether contrasts are driven by species composition, within-species pricing, or scale (lot-size) effects. Descriptive statistical indicators, non-parametric inference (Mann–Whitney tests) and effect-size measures are complemented with alternative price models (log-OLS, Gamma-GLM and GAM) to assess the robustness of the price–quantity relationship. Results indicate that Bonanza tends to exhibit stronger performance for the typical vessel (higher landings, higher revenues, and greater species diversification), whereas Isla Cristina concentrates a larger share of total activity, consistent with a more scale-oriented structure dominated by a subset of high-throughput vessels. Differences in average unit values between ports are largely explained by species mix and volume weights (i.e., the relative importance of high- versus low-value taxa), while composition-controlled models point to a smaller within-species port effect for Isla Cristina that varies with landed quantity. Overall, routinely collected auction data provide a consistent basis for comparing port-level market outcomes and for distinguishing whether cross-port differences arise primarily from composition, pricing, or both. Wed, 13 May 2026 00:00:00 GMT http://hdl.handle.net/10498/40503 2026-05-13T00:00:00Z http://hdl.handle.net/10498/40398 From Coastal Flooding to Residual Beach Functionality: Implications of Sea-Level Rise for Coastal Management in Southern Spain Contreras de Villar, Antonio; Contreras de Villar, Francisco; Vidal Pérez, Juan Manuel; Pérez Moreno, Cristina; Alonso del Rosario, José Juan; López García, Patricia; Jigena Antelo, Bismarck; Muñoz Pérez, Juan José Sea-level rise may substantially reduce the dry space available on sandy beaches, although its effects depend strongly on local beach characteristics. This study evaluates the residual spatial functionality of five beaches in southern Spain using two normalized indicators: residual available surface area (FA) and residual available beach width (FW). Both express the proportion of dry beach space remaining relative to a common present-day reference condition without wave run-up. The analysis builds on previously calculated inundation results for present conditions and representative Concentration Pathway (RCP) 4.5 and RCP 8.5 scenarios for 2026–2045 and 2081–2100, including astronomical tide, meteorological residual, sea-level rise, and wave run-up. Marked differences are observed among the studied beaches across both time periods. Under RCP 4.5 in 2026–2045, Torreguadiaro retains 85.1% of its reference area and 79.8% of its reference mean width. Rinconcillo retains 31.9% and 38.7%, respectively. Under RCP 8.5 in 2081–2100, these values decrease to 75.6% and 65.3% at Torreguadiaro. At Rinconcillo, they decrease to 7.1% and 17.6%. FA and FW also evolve differently among sites: their values remain relatively close at Malagueta but diverge markedly at Rinconcillo under the most severe scenario. Joint consideration of FA and FW therefore provides complementary information on the amount and configuration of residual dry beach space and may support comparison among beaches from a coastal management perspective. Fri, 16 Oct 2026 00:00:00 GMT http://hdl.handle.net/10498/40398 2026-10-16T00:00:00Z http://hdl.handle.net/10498/40383 La luz degradada. Faro de Bonanza en Sanlucar de Barrameda Santamaría Barrios, Manuel Antonio Historia del Faro de Bonanza en Sanlucar de Barrameda (Cádiz) Wed, 01 Jul 2026 00:00:00 GMT http://hdl.handle.net/10498/40383 2026-07-01T00:00:00Z http://hdl.handle.net/10498/40142 Engineering Lessons from Four Decades of Beach Nourishment in Spain: A Review of Quality Control, Monitoring and Adaptive Coastal Management Contreras-de-Villar, Antonio; Poullet, Patricio; Garcia-Lopez, Santiago; Martell, Raul; Contreras de Villar, Francisco; Jigena Antelo, Bismarck; Muñoz-Perez, Juan J. Beach nourishment has become one of the principal soft-engineering strategies for mitigating coastal erosion while preserving the recreational, environmental and protective functions of sandy beaches. During the last four decades, Spain has accumulated extensive experience in beach nourishment, with annual nourishment volumes approaching 10 million m3 under a wide range of coastal settings. Many of the best-documented engineering examples originate from the Gulf of Cadiz, although the lessons synthesized here are interpreted within the broader context of Spanish coastal practice. This structured narrative review combines publications retrieved from Web of Science and Google Scholar with Spanish technical reports, project records, and institutional sources. It focuses on borrow-area characterization, sediment compatibility, construction quality control, post-nourishment monitoring, and adaptive management. Rather than providing a chronological description of nourishment projects, this review examines how repeated project implementation, monitoring and maintenance have progressively reduced uncertainty and improved engineering practice. Long-term nourishment performance is controlled more by sediment compatibility, local morphodynamics, and construction quality than by the total sediment volume placed. It also demonstrates that systematic monitoring provides the feedback required to improve future project design, optimize maintenance strategies and support evidence-based coastal management. The principal contribution of four decades of Spanish beach nourishment has been the progressive development of an engineering framework in which quality control, long-term monitoring and accumulated field experience continuously refine project planning and management. Although derived from Spanish practice, the lessons synthesized are broadly applicable to nourishment programs facing increasing pressures from climate change, sediment scarcity and growing environmental constraints. Thu, 30 Jul 2026 00:00:00 GMT http://hdl.handle.net/10498/40142 2026-07-30T00:00:00Z