Holocene landscape evolution in the Baza Basin (SE-Spain) as indicated by fluvial dynamics of the Galera River
Holocene landscape evolution in the Baza Basin (SE-Spain) as indicated by fluvial dynamics of the Galera River
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DOI：
10.1016/j.qsa.2021.100030
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
D. Wolf;F. García-Tortosa;C. Richter;J. Dabkowski;Christopher-Bastian Roettig;D. Faust
中科院分区：
文献类型：
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作者：
D. Wolf;F. García-Tortosa;C. Richter;J. Dabkowski;Christopher-Bastian Roettig;D. Faust
河流系统行为与气候强迫、构造和人类活动等潜在影响因素之间的具体关系是地貌学研究中的一个关键问题。在这方面，特别是伊比利亚半岛是一个非常令人感兴趣的地区，因为其景观对气候变化和人类影响非常敏感。如今，伊比利亚半岛揭示了一个强烈的异质性和空间碎片化的气候配置。考虑到气候通常被认为是河流动力学最重要的触发因素，这应该会引起河流地貌系统的不同行为。事实上，位于伊比利亚更潮湿和更干旱地区的河流系统往往揭示了全新世洪泛平原演变的偏离模式。这就提出了一个问题，即这些模式实际上是由不同的气候历史造成的，还是其他因素造成的。在这项研究中，我们调查了位于安达卢西亚东部高地（西班牙东南部）的加莱拉河的全新世洪泛平原演变巴扎盆地。详细的地层剖面测井和密孔放射性碳测年相结合，揭示了全新世河流动力学总体上遵循区域气候发展，这证明了加莱拉洪泛平原记录是一个有价值的档案全新世景观演变。然而，我们表明，河流动力学的加莱拉系统很难在伊比利亚的其他河流系统相比，即使气候演变不是那么不同。我们的研究结果表明，在河流系统具有不同的基本条件和流域特定的配置，类似的气候影响可能会导致偏离河流过程制度（分歧现象），因为其他参数，如地质底层，浮雕组成，构造，或人为干预的重大印记。
The concrete relationships between fluvial system behavior and potential influencing factors that are, among others, climate forcing, tectonics, and human activity are a key issue in geomorphological research. In this regard, especially the Iberian Peninsula is an area of great interest because its landscapes are highly sensitive towards climate changes and anthropogenic impact. Nowadays, the Iberian Peninsula reveals a strongly heterogeneous and spatially fragmented climate configuration. This should give rise to disparate behavior of fluvial geomorphic systems considering that climate is generally assumed the most important trigger of fluvial dynamics. In fact, river systems located in more humid and more arid regions in Iberia often reveal deviating patterns of Holocene floodplain evolution. This raises the question of whether these patterns were actually caused by a different climate history or if, alternatively, other factors might have been responsible. In this study, we investigated the Holocene floodplain evolution of the Galera River that is located in the upland of Eastern Andalucía (SE-Spain) named Baza Basin. A combination of detailed stratigraphic profile logging and close-meshed radiocarbon dating revealed that Holocene river dynamics generally followed the regional climatic development, which proves the Galera floodplain record to be a valuable archive of Holocene landscape evolution. However, we demonstrate that fluvial dynamics of the Galera system are hardly comparable to other river systems in Iberia even if the climate evolution was not so different. Our results suggest that in river systems with different basic conditions and catchment-specific configurations, similar climatic influences may lead to deviating fluvial process regimes (divergence phenomenon) because of substantial imprints of other parameters such as geological substratum, relief composition, tectonics, or human interventions.