• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Combining historical and process perspectives to infer ranges of geomorphic variability and inform river restoration in a wandering gravel-bed river
【24h】

Combining historical and process perspectives to infer ranges of geomorphic variability and inform river restoration in a wandering gravel-bed river

机译：结合历史和过程的观点来推断地貌变异的范围，并为游荡的砾石层河中的河流恢复提供信息

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

Restoration approaches such as dam removal and channel reconstruction have moved beyond the realm of small streams and are being applied to larger rivers. This development has substantial economic and ecological implications but may test gaps in our understanding of larger river systems and of restoration science. We examine how information about historical ranges of geomorphic variability can inform stream restoration in the context of the Clark Fork River, Montana, focusing on a study reach where one of the largest restoration projects to date was implemented, upstream of the recently removed Milltown Dam. Analysis of historical sources and aerial photographs of the Clark Fork River's pre-mining, mining, and more recent history suggest that a wandering channel pattern has persisted despite variations in sediment supply and transport capacity. Predictive metrics for channel pattern also suggest a wandering pattern, transitional between braided and meandering, in this geomorphic setting. These analyses suggest that the creation of a single-thread meandering channel, which incorporates structures to limit erosion and channel movement, is inconsistent with the historical range of variability in this reach. The perils of restoring channels to a condition different than the historical range of variability for their geomorphic setting were illustrated on the Clark Fork by flood-induced avulsions of the restored channel that occurred soon after project construction. Application of an experimental approach to restoration, founded on the method of multiple working hypotheses, provides a means for embracing uncertainty, can maximize the potential for site-specific restoration success, and can foster advances in restoration science.
机译：大坝拆除和河道重建等修复方法已经超越了小溪流的领域，并已应用于较大的河流。这一发展具有重大的经济和生态意义，但可能会在我们对较大的河流系统和恢复科学的理解方面出现差距。我们研究了有关地貌变异性历史范围的信息如何在蒙大拿州克拉克福克河的背景下为河流恢复提供信息，重点是研究范围，该范围是迄今为止拆除的米尔敦大坝上游实施的迄今为止最大的修复项目之一。对克拉克福克河开采前，开采和最近历史的历史资料和航拍照片的分析表明，尽管沉积物供应和运输能力有所变化，但仍在徘徊的河道模式依然存在。在这种地貌环境中，通道模式的预测指标也表明存在一种漫游模式，在编织和蜿蜒之间过渡。这些分析表明，创建一个单线曲折河道，该河道结合了限制侵蚀和河道运动的结构，与该河段变化的历史范围不一致。在克拉克福克（Clark Fork）上，通过洪水诱发的对恢复通道的破坏在项目建设后不久发生，说明了将通道恢复到不同于其地貌环境的历史变化范围的条件的危险。在多种工作假设方法的基础上，将实验方法应用于修复工作，为拥抱不确定性提供了一种方法，可以最大程度地提高针对特定地点进行修复的潜力，并可以促进修复科学的进步。

著录项

相似文献

  • 外文文献
  • 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