...
  • 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 >Gully, channel and hillslope erosion - an assessment for a traditionally managed catchment
【24h】

Gully, channel and hillslope erosion - an assessment for a traditionally managed catchment

机译：沟渠，河道和山坡侵蚀-对传统管理的集水区的评估

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

Understanding landscape features such as gullying and soil erosion is an important issue in the long-term dynamics and evolution of both natural, agricultural and rehabilitated (i.e. post-mining) landscapes. Considerable research has been undertaken examining the initiation, movement and overall dynamics of such features. This study reports on a series of 34 gully heads and other erosion features, such as scour holes (five in total), located in channels in a catchment largely undisturbed by European activity in the Northern Territory, Australia over a 5 year period (2002-2007). During this period the erosion features were monitored for their headward advance/retreat, enlargement or in-filling. The erosion features ranged in depth from 0.2 m to 1.5 m and widths of 0.3 m to 8 m. Hillslope erosion was also monitored using erosion pins. The catchment was subject to a range of rainfall regimes including extreme rainfall and a Category 5 cyclone and also was burnt every second year so that all grass cover was removed according to traditional management practice. The results of this monitoring show that the erosion features have changed little during this 5 year period. A remote sensing assessment found no relationship between erosion feature morphology and hillslope erosion. The monitored gullies heads and scour holes appear to be resilient landscape features, yet have a morphology that suggests they are ready for rapid headward movement and expansion, leading to a destabilisation of the catchment. Hillslope erosion was found to be related to wetness indices derived from a digital elevation model. Significant linkages were found between hillslope erosion and change in erosion feature depth, indicative of a strong hillslope-channel coupling.
机译：在自然，农业和恢复原状（即采矿后）景观的长期动态和演变中，了解诸如沟壑和土壤侵蚀等景观特征是一个重要的问题。已经进行了大量的研究来检查这些特征的启动，移动和整体动力学。这项研究报告了在过去的5年中，位于澳大利亚北领地的集水区的沟渠（主要是五个冲沟）和其他侵蚀特征，如冲刷孔（总共五个），这些集水沟基本上不受欧洲活动的干扰（2002- 2007）。在此期间，对侵蚀特征的前进/后退，扩大或填充进行了监控。侵蚀特征的深度范围为0.2 m至1.5 m，宽度范围为0.3 m至8 m。还使用侵蚀针来监测坡地侵蚀。该流域受一系列降雨制度的影响，包括极端降雨和第5类旋风，并且每两年进行焚烧，以便根据传统管理惯例清除所有草皮。监测结果表明，在这5年中，侵蚀特征变化不大。遥感评估发现侵蚀特征形态与坡地侵蚀之间没有关系。监视的沟壑头和冲刷孔似乎是有弹性的景观特征，但形态表明它们已准备好快速向前方移动和扩张，导致集水区不稳定。发现山坡侵蚀与数字高程模型得出的湿度指数有关。在山坡侵蚀与侵蚀特征深度变化之间发现了显着的联系，表明山坡-沟渠耦合很强。

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