Valdevaqueros沙丘系统:历史演变和管理方案

IF 0.2 Q4 WATER RESOURCES
F.J. Bello-Millán , M. Somoano , M. Clavero , G. Gómez-Pina , M.A. Losada
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引用次数: 4

摘要

西班牙南部的Valdevaqueros沙丘显示出与直布罗陀海峡强烈的东风有关的高迁移率。该系统位于人类压力高的地区,其动态与土地利用发生碰撞,从科学和技术的角度来看,也从媒体和社会的角度来看,造成了重大影响。本文研究了20世纪初以来沙丘系统的历史演变,通过研究现有的地图和摄影资料,分析了沙丘系统的不同阶段、沙丘行为的机制和自然因素,以及该地区活动产生的影响。对沙丘走廊的干预始于20世纪40年代初,它决定了地貌区域内所有过程的演变。泥沙收支可以解释当前沙丘的形态动力学。该系统接收来自淹没区的沙子,这些沙子由西风波输送。这些物质堆积起来,使干燥的海滩变宽。东风侵蚀了干燥海滩上的沉积物,并将其运送到沙丘上。在过去的50年里,干海滩(fetch)平均增长了150多米,该系统储存了足够的沙子来维持这些运输机制几十年。根据这些结果,我们讨论了该地区综合管理的不同选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
El sistema dunar de Valdevaqueros: evolución histórica y alternativas de gestión

Valdevaqueros dune, in the south of Spain, exhibits high migration rates associated with strong easterly winds in the Strait of Gibraltar. The system is located in an area of high human pressure and its dynamic has collided with land use causing a significant impact from scientific and technical points of view but also from a media and social perspective. This paper focuses on the historical evolution of the dune system since the beginning of the 20th century by studying the available cartographic and photographic material, analyzing the different phases, the mechanisms and natural agents governing the dune behaviour and the implications arising from the activities in the area. The intervention on the dune corridor started in the early 1940s and has conditioned the evolution of all the processes in the physiographic region. The current dune morphodynamics is explained by the sediment budget. The system receives sand from the submerged zone, which is transported by westerly wind waves. This material accumulates and widens the dry beach. The easterly winds erode the sediment in the dry beach and transports it to the dune. In the last fifty years, the dry beach (fetch) has grown, on average, over 150 m and the system stores enough sand to sustain these transport mechanisms for decades. From these results, we discuss different alternatives for the integrated management of the area.

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