黄土质地对坡面侵蚀的影响

发布时间：2018-05-12 01:28

本文选题：黄土质地 + 坡面侵蚀　；参考：《水土保持学报》2016年01期

【摘要】：采用室内人工模拟降雨试验,研究了黄土质地对坡面侵蚀的影响,并探讨了降雨、地形(坡度和坡长)及黄土土质对坡面侵蚀的综合作用。试验设计包括3种质地黄土(黄绵土、黑垆土和X土)、4个坡度(10°,15°,20°和25°)、2个坡长(5m和10m)和2个总降雨量相同的降雨强度(90,120mm/h)。结果表明:在相同降雨条件下,X土降雨过程中入渗缓慢,产流时间快于黑垆土与黄绵土,X土坡面的径流总量高于黑垆土和黄绵土坡面。坡度对单宽产流率无影响。各因子按对单宽产流率影响程度从大到小依次为坡长、雨强、粘粒含量和有机质;各因子按对单宽产沙量按影响程度从大到小依次为坡长、土壤颗粒几何平均直径、雨强、有机质含量和坡度。
[Abstract]:The effects of loess texture on slope erosion were studied by artificial rainfall simulation in laboratory, and the comprehensive effects of rainfall, topography (slope degree and slope length) and loess soil quality on slope erosion were discussed. The experimental design includes three types of loess (loess soil, black loessial soil and X soil), four slopes of 10 掳, 15 掳, 20 掳and 25 掳, two slopes of 5 m and 10 m) and two rainfall intensities of 90120 mm / h with the same total rainfall. The results showed that under the same rainfall conditions, the infiltration rate was slow and the runoff production time was faster than that on the slope surface of black loessial soil and yellow loessial soil, which was higher than that of black loessial soil and yellow loessial soil. The slope has no effect on the rate of single width runoff. The influencing degree of each factor is slope length, rain intensity, clay content and organic matter, and slope length, geometric average diameter of soil particle, rain intensity according to the influence degree of single width sediment yield from large to small, each factor is the length of slope, the geometric average diameter of soil particle, and the rain intensity, according to the influence degree of single width sediment yield. Organic matter content and slope.
【作者单位】：西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院地理科学与资源研究所陆地水循环与地表过程重点实验室;
【基金】：国家自然科学基金面上项目(41471229,41271304) 水利部公益性行业科研专项(201301059) 黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金项目(A314021402-1518)
【分类号】：S157.1

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