文章摘要
陈培济,黄炎和,蒋芳市,林金石,詹振芝,胡安东,黄清瑜,申芳芳,陈泽文.集中水流冲刷条件下土石崩积混合物坡面产沙特征[J].水土保持学报,2016,(3):
集中水流冲刷条件下土石崩积混合物坡面产沙特征
Feature of Sediment Yield on Soil-rock Mixed Colluvial Soil Slope under Concentrated Flow
投稿时间:2016-01-06  修订日期:2016-03-06
DOI:
中文关键词: 崩岗崩积体  土石混合物  集中水流  土壤侵蚀
英文关键词: colluvial soil  soil-rock mixture  concentrated flow  soil erosion
基金项目:国家自然科学基金项目;国家科技支撑计划项目
作者单位邮编
陈培济 福建农林大学资源与环境学院 350002
黄炎和 福建农林大学资源与环境学院 350002
蒋芳市 福建农林大学资源与环境学院 
林金石 福建农林大学资源与环境学院 
詹振芝 福建农林大学资源与环境学院 
胡安东 福建农林大学资源与环境学院 
黄清瑜 福建农林大学资源与环境学院 
申芳芳 福建农林大学资源与环境学院 
陈泽文 福建农林大学资源与环境学院 
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中文摘要:
      通过室内人工放水冲刷试验,探究不同流量(2 L/min、4 L/min、8 L/min、16 L/min)和砾石含量(0%、20%、40%、60%)条件之下土石崩积混合物坡面产沙特征。结果表明:各条件下产沙过程均呈“先增大后减小再趋于稳定”的趋势。产沙量随着流量的增大而增大,而含沙量随流量的增大总体呈减小的趋势;在2 L/min和4 L/min条件下,产沙量及含沙量随着砾石含量的增大呈先减小后增大的趋势,存在临界砾石含量(20-40%之间);在8 L/min和16 L/min条件下,产沙量及含沙量随着砾石含量的增大而增大。产沙率与含沙量的关系表明含石量对产沙的影响存在临界含石量(20% - 40%)。砾石含量和流量可以用来很好地预测土石崩积混合物的产沙率,但对含沙量的预测效果较差。流量对产沙率及含沙量的影响均大于砾石含量。
英文摘要:
      The soil-rock mixed colluvial slope was selected to study the feature of sediment yield that was affected by four gravel contents(0%,20%,40%,60%) and four discharges(2 L/min ,4 L/min,8 L/min,16 L/min) in indoor artificial runoff experimental condition.The results showed that: the process of sediment yield indicated that the sediment yield overall increased first, and then decreased, reached a steady finally with erosion duration. Sediment volume increased with increasing discharge, whereas sediment concentration decreased with increasing discharge; sediment volume and sediment concentration firstly decreased and then increased with increasing gravel content at the discharges of 2 L/min and 4 L/min, existing critical gravel content (20% - 40%), but sediment yield and sediment concentration increased with increasing gravel content at the discharges of 8 L/min and 16 L/min. According to the relationship between sediment yield rate and sediment concentration, it was indicated that the effect of gravel content on sediment yield existed critical gravel content (20% - 40%). Gravel content and discharge could be used to predict sediment yield rate of soil-gravel mixed colluvial slope correctly, but prediction for sediment concentration was poorer. The effects of discharge were higher than gravel content.
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