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赵士杰,蔡雄飞,王济,等. 喀斯特地区坡耕地细沟侵蚀产流产沙过程及特征[J]. 科学技术与工程, 2020, 20(27): 11012-11017.
Zhao Shijie,王济,et al.Runoff and sediment yield process and characteristics of rill erosion in sloping farmland in karst area[J].Science Technology and Engineering,2020,20(27):11012-11017.
喀斯特地区坡耕地细沟侵蚀产流产沙过程及特征
Runoff and sediment yield process and characteristics of rill erosion in sloping farmland in karst area
投稿时间:2019-11-20  修订日期:2020-08-21
DOI:
中文关键词:  喀斯特地区  ? 坡耕地  ? 细沟侵蚀  ? 坡度  ? 含沙量
英文关键词:karst area  sloping land  rill erosion  slope  sediment yield
基金项目:贵州省科技支撑计划项目(黔科合支撑[2017]2580)和贵州省科技计划项目(黔科合基础[2019]1231号)
           
作者单位
赵士杰 贵州师范大学地理与环境科学学院
蔡雄飞 贵州师范大学地理与环境科学学院
王济 贵州师范大学地理与环境科学学院
李丁 贵州师范大学地理与环境科学学院
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中文摘要:
      为研究喀斯特地区坡耕地不同条件下产流产沙特征,通过野外细沟侵蚀模拟实验,分析径流侵蚀的发展机理及其影响因素,深入研究径流侵蚀过程的产沙特征,结果表明:在相同流量下,试验区表现为坡度越大初始含沙量越高,且地表含沙量随降雨时间的增加呈不同程度递减趋势,仅红枫湖含沙量随降雨时间呈“双波峰”状态;流量为5 L·min-1下,坡度增加到20°对径流含沙量有一定的抑制作用,10 L·min-1流量下,含沙量均随坡度增大呈不同增加趋势,且与坡度均呈显著正相关,相关系数分别为0. 985、0. 913、0. 938、0. 910;南明区试验点计算得到的Kr值最低,抗侵蚀能力最强。对于各试验点,含沙量总体随时间增加呈递减趋势,并与坡度存在显著正相关,且黏粒含量越高土壤抗蚀性越强。
英文摘要:
      In order to study the characteristics of runoff and sediment yield under different conditions of sloping farmland in Karst mountainous area, the development mechanism of runoff erosion and its influencing factors were analyzed by field rill erosion simulation experiment, and the sediment yield characteristics of runoff erosion process were studied in depth, the results show that: Under the same flow rate, the test area shows that the greater the slope, the higher the initial sediment concentration, and the surface sediment concentration decreases with the increase of rainfall time, only the sediment concentration of Hongfeng Lake is in a “double peak”. Under the flow rate of 5 L·min-1, the slope increases to 20°, which has a certain inhibitory effect on the runoff sediment concentration. Under the flow rate of 10 L·min-1, the sediment concentration increases with the slope, and There is a significant positive correlation with the slope, and the correlation coefficients are 0. 985, 0. 913, 0. 938, and 0. 910. At the test site in Naming district, the Kr value is the lowest and the erosion resistance is the strongest. For each test site, the overall sand content showed a decreasing trend with time, and there was a significant positive correlation with the slope, and the higher the clay content, the stronger the soil erosion resistance.
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