• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Natural hazards and earth system sciences >Historical flash floods retromodelling in the Ondara River in T'arrega (NE Iberian Peninsula)
【24h】

Historical flash floods retromodelling in the Ondara River in T'arrega (NE Iberian Peninsula)

机译：T'arrega（伊比利亚东北半岛）的Ondara河中的历史性山洪暴发

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Flash floods in the Ondara River have caused many fatalities and damages in the town of T'arrega in the last 400 yr. Unfortunately, no flow records are available. However, floods can sometimes be reconstructed thanks to available historical information: limnimarks, written accounts and archaeological surveys. Indeed, from these data and using the retromodelling method on three different scenarios to take into account morphology changes, the peak flows of the seven greatest floods occurred in T'arrega since the 17th century were estimated. The results showed that the heaviest flood’s specific peak flow (10.7m3 s?1 km?2) ranks among the highest ever modelled or measured in similar-sized catchments in the Western Mediterranean region. The results pointed out, as well, that the changes in channel’s morphology (mainly, the disappearance of a mediaeval bridge under sediment) caused by one of the floods increased the hydraulic capacity of a crucial crosssection. All this resulted in modest floods invading the town less often, but with much faster and, thus, more destructive flows. A preliminary estimation of the results’ uncertainty was 4% for great floods and 18% for modest floods. The reconstructed peak flows will be introduced in a database for a future use in climatic and hydrological studies.
机译：在过去的400年中，昂达拉河的山洪暴发在塔拉雷加（T'arrega）镇造成许多死亡和财产损失。不幸的是，没有流记录。但是，有时可以借助可用的历史信息来重建洪水：limnimarks，书面记录和考古调查。实际上，根据这些数据并在三种不同情况下使用逆模型方法考虑了形态变化，估计了自17世纪以来塔雷拉加发生的七次最大洪水的峰值流量。结果表明，在地中海地区类似规模的集水区，最大洪水的特定峰值流量（10.7m3 s？1 km？2）在模型或测量中最高。结果还指出，一次洪水造成的河道形态变化（主要是沉积物下方的中世纪桥梁的消失）增加了关键断面的水力。所有这些导致适度的洪水入侵该镇的频率降低了，但速度更快，因此破坏性更大。对结果的不确定性的初步估计是，大洪水为4％，中等洪水为18％。重建的峰值流量将引入数据库中，以备将来在气候和水文研究中使用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号