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Characteristics of runoff processes on unmetalled loess roads under experimental rainfall conditions

机译：试验降雨条件下非金属化黄土公路径流过程特征

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摘要

Runoff commonly triggers severe erosion on unmetalled road surfaces and roadside slopes. In this context, this paper explores the use of theoretical analysis of runoff processes for an unmetalled loess road, based on the kinematic wave theory, and explores the key controlling factors. The results of the theoretical analysis are assessed using measured data from simulated rainfall tests on artificial experimental road sections. The results suggested that: (1) the kinematic wave equation is appropriate for describing dynamic processes of overland flow on unmetalled loess roads; (2) the discharge, depth and velocity of runoff on the unmetalled loess roads increased with increasing rainfall intensity, whereas the velocity of runoff increased with increasing slope length; (3) the velocity of runoff increased as flow depth decreased with increasing slope gradient; and (4) unit width discharge on road sections with different slopes under the same rainfall intensity (120 mm h~(-1)) remained similar.
机译：径流通常会在未金属化的路面和路边斜坡上引发严重的侵蚀。在这种情况下，本文基于运动波理论，探索了对非金属化黄土公路径流过程的理论分析的应用，并探讨了关键的控制因素。理论分析的结果是使用来自人工实验路段的模拟降雨测试的测量数据进行评估的。结果表明：（1）运动波方程适用于描述非金属化黄土公路上陆面水流的动力学过程； （2）非金属化黄土公路上径流量，深度和流速随降雨强度的增加而增加，径流速度随边坡长度的增加而增加； （3）随着坡度的增加，径流速度随水深的减小而增加； （4）在相同降雨强度（120 mm h〜（-1））下，不同坡度的路段的单位宽度排放保持相似。

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  • 来源
  • 会议地点 Chengdu(CN)
  • 作者

    FENGXIA TIAN; XIUBIN HE; GUIYU LI; SHIQING ZHENG;

  • 作者单位

    Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;

    Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;

    CHINA Water Resources Pearl River Planning, Surveying and Designing Co. Ltd, Guangzhou 510610, China;

    Institute of Soil and Water Conservation, CAS MWR, Yangling, Shaanxi 712100, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    unmetalled loess roads; kinematic wave theory; flow depth; flow velocity; slope gradient;

    机译：无金属的黄土路；运动波理论流动深度流速坡度;

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