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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Weather types, runoff and sediment yield in a Mediterranean mountain landscape
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Weather types, runoff and sediment yield in a Mediterranean mountain landscape

机译：地中海山区景观的天气类型，径流和沉积物产量

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摘要

The relationship between the synopticweather types (WTs), runoff and sediments in aMediterranean mountain landscape was analysed. The study was performed between 2005 and 2012 using one of the most complete and extensive daily databases of rainfall, runoff and sediment recorded in the Spanish Pyrenees, coupled with WTs defined from the National Meteorological Center/National Center for Atmospheric Research (NMC/NCAR) 40-Year Reanalysis Project?. The results show that the three wettest WTs accounted for 30% of rainy days and 46%of rainfall, but comprised only 13%of total daily records. To obtain a much more robust association betweenWTs and rainfall an analysis was carried out using a longer rainfall record (1989-2011). The analyses confirmed that the results obtained from the Araguás catchment are representative of a longer time span. The cyclonic, north-westerly and westerly WTs play an important role in runoff generation, coinciding with the wettest WTs. Extreme floods are commonly associated also with south-westerly and westerly airflows, whereas less flooding was generated under cyclonic circulations. Sediment transport was concentrated in 2.9% of total time mainly related to westerly WTs. Seasonal differences exist inWT frequency. Inwinter and spring north-west andWest are the most prominentWTs related to rainfall,water and sediment yield, although in spring cyclonic frequency was higher. During autumn north-west and south-west were the most frequent, but sediment yield was produced nearby under south-west flow. In summer the WTs that produce sediment are north and west. A magnitude-frequency analysis shows the different behaviour of WTs according to their efficiency in producing runoff and sediment. A study with different monitored areas around the Iberian Peninsula and the Mediterranean basin would be very valuable in providing information for hydrological and sediment behaviour under the current conditions of global climate change.
机译：分析了地中海山区景观的天气类型，径流和沉积物之间的关系。这项研究是在2005年至2012年之间使用西班牙比利牛斯山脉记录的最完整，最广泛的每日降雨，径流和沉积物数据库之一，再加上国家气象中心/国家大气研究中心（NMC / NCAR）定义的WTs 40年再分析项目？结果表明，三个最湿的WT占雨天的30％和降雨量的46％，但仅占每日总记录的13％。为了获得WT和降雨之间更牢固的联系，我们使用更长的降雨记录（1989-2011）进行了分析。分析证实，从阿拉瓜流域获得的结果代表了更长的时间跨度。旋风，西北风和西风WT在径流产生中起重要作用，与最湿的WT一致。极端洪水通常也与西南风和西风气流有关，而在气旋环流下产生的洪水较少。泥沙运移集中在总时间的2.​​9％中，主要与西风WT有关。 WT频率存在季节性差异。冬季和春季西北和西部是与降雨，水和泥沙产量相关的最显着WT，尽管春季气旋频率较高。在秋季，西北和西南是最常见的，但是在西南流的作用下，附近却产生了泥沙。在夏季，产生沉积物的WT位于北部和西部。幅度-频率分析根据WTs产生径流和沉积物的效率显示了WTs的不同行为。对伊比利亚半岛和地中海盆地周围不同监测区域进行的研究在提供当前全球气候变化条件下的水文和泥沙行为信息方面将非常有价值。

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