| 连续降雨下不同砾石含量工程堆积体土壤侵蚀 |
| |
| 引用本文： | 吕佼容,张文博,胡锦昇,骆汉,谢永生.连续降雨下不同砾石含量工程堆积体土壤侵蚀[J].水科学进展,2019,30(2):210-219. |
| |
| 作者姓名： | 吕佼容 张文博 胡锦昇 骆汉 谢永生 |
| |
| 作者单位： | 1.中国科学院水利部水土保持与生态环境研究中心, 陕西 杨凌 712100; |
| |
| 基金项目： | 国家自然科学基金资助项目（41601300）；"西部之光"西部青年学者B类资助项目（XAB2015B06） |
| |
| 摘 要： | 为探究砾石对工程堆积体土壤侵蚀的影响与其作用机制,通过室内模拟降雨研究了连续降雨下不同砾石含量的重壤质堆积体水蚀过程。结果表明:①堆积体砾石含量增加,坡面产流历时延长,产流率线性减小,土壤剥蚀率降低;②连续降雨下,堆积体所含砾石主要通过对坡面产流历时、坡面产流率、砾石覆盖率的多重影响发挥减沙作用,主成分回归方程可表达多个变量与平均土壤剥蚀率的关系;③一定砾石含量下,堆积体坡面砾石覆盖率随表土的剥离而增大,导致土壤剥蚀率呈指数函数递减趋势,并与累积土壤侵蚀总量存在较好的函数关系。工程堆积体所含砾石对土壤侵蚀程度的削减可为生产建设项目下垫面水土保持治理提供重要参考。
|
| 关 键 词： | 工程堆积体 砾石含量 砾石覆盖率 连续降雨 主成分回归 |
| 收稿时间： | 2018-06-26 |
Effects of rock fragment content on erosion characteristics of spoil heaps under multiple rainfall events |
| |
| LYU Jiaorong,ZHANG Wenbo,HU Jinsheng,LUO Han,XIE Yongsheng.Effects of rock fragment content on erosion characteristics of spoil heaps under multiple rainfall events[J].Advances in Water Science,2019,30(2):210-219. |
| |
| Authors: | LYU Jiaorong ZHANG Wenbo HU Jinsheng LUO Han XIE Yongsheng |
| |
| Institution: | 1.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China;2.University of the Chinese Academy of Sciences, Beijing 100049, China;3.Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China |
| |
| Abstract: | To examine the effects of rock fragment contents of spoil heaps on hydrological and sediment yielding processes,multiple simulated rainfall experiments were conducted in the laboratory. The results showed that,as the rock fragment content in the spoil heap increased,the duration of runoff generation on the slope was prolonged,the rate of runoff decreased linearly,and the soil detachment rate decreased. Under multiple rainfall events,rock fragments in spoil heaps decreased sediment yield primarily through the effects on runoff generation duration,runoff rate and rock fragment cover,and principal component regression could express the relationship between these factors and the average soil detachment rate. Under a certain rock fragment content,as surface soil was detached under multiple rainfall events,the rock fragment cover increased,which caused the soil detachment rate to decrease exponentially and also had a significant functional relationship with the accumulated total soil loss. The erosion reduction effect of the rock fragments contained in the spoil heaps can provide an important reference for water and soil conservation of the underlying surface of production and construction projects. |
| |
| Keywords: | spoil heaps rock fragment content rock fragment cover multiple rainfall events principal components regression |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
| 点击此处可从《水科学进展》下载免费的PDF全文 |
|
