• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Estimation of Ravine Sediment Production and Sediment Dynamics in the Lower Le Sueur River Watershed, Minnesota
【2h】

Estimation of Ravine Sediment Production and Sediment Dynamics in the Lower Le Sueur River Watershed, Minnesota

机译：明尼苏达下勒苏尔河流域峡谷沉积物产沙量和泥沙动态估算

页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study focuses on quantifying explicitly the sediment budget of deeply incised ravines in the lower Le Sueur River watershed, in southern Minnesota. High-rate-gully-erosion equations along with the Universal Soil Loss Equation (USLE) were implemented in a numerical modeling approach that is based on a time-integration of the sediment balance equations. The model estimates the rates of ravine width and depth change and the amount of sediment periodically flushing from the ravines. Components of the sediment budget of the ravines were simulated with the model and results suggest that the ravine walls are the major sediment source in the ravines. A sensitivity analysis revealed that the erodibility coefficients of the gully bed and wall, the local slope angle and the Manning’s coefficient are the key parameters controlling the rate of sediment production. Recommendations to guide further monitoring efforts in the watershed and increased detail modeling approaches are highlighted as a result of this modeling effort.
机译：这项研究的重点是明确量化明尼苏达州南部Le Sueur河下游流域深切沟壑的沉积物收支。在基于沉积物平衡方程式时间积分的数值模拟方法中，实现了高速冲刷侵蚀方程式和通用土壤流失方程式（USLE）。该模型估计了沟壑宽度和深度的变化率以及定期从沟壑中冲出的沉积物数量。用该模型模拟了沟壑区沉积物收支的组成，结果表明，沟谷是沟壑区的主要沉积物来源。敏感性分析表明，沟床和墙体的侵蚀系数，局部倾斜角和曼宁系数是控制泥沙产生速率的关键参数。作为这种建模工作的结果，突出了指导分水岭中进一步监视工作的建议和增加详细模型的方法。

著录项

  • 作者

    Azmera Luam A;

  • 作者单位
  • 年度 2009
  • 总页数
  • 原文格式 PDF
  • 正文语种
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

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