Results 41 to 50 of about 672 (144)
Shuitu Baochi Xuebao, 2005 坡面侵蚀是水流能量作用的结果．草本植被对坡面流能量的作用有重要影响．研究坡沟系统坡面草被不同盖度及空间配置下坡面流能量的变化过程与特征．对于揭示草被减蚀作用机理有重要意义。本文利用实验土槽和放水冲刷试验方法．研究了2种流量（3．2L／min和5．2L／min）．坡面5种草被盖度（0，30％，50％．70％和90％）及3种空间配置（坡上部、坡中部、坡下部）下，坡沟系统坡面径流能量的变化过程与特征。结果表明，有草断面比无草断面下的径流动能、势能普遍偏小．变化幅度也较平缓 ...
李勉 姚文艺 陈江南 丁文峰 杨剑锋 李莉 杨春霞
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Current situation and scientific challenge of soil and water erosion in Gully Consolidation and Highland Protection Project of DongZhi Loess Plateau [PDF]
Due to the influence of extreme rainfall and high intensity human engineering activities, the advance speed of the gully head in the Loess Tableland is intensified, which seriously threatens the economic and social development of the Loess Tableland.
Buping ZHANG +5 more
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The Terraced Walls Significantly Influence the Spatial Distribution of Soil Water in Terraced Areas on the Loess Plateau [PDF]
[Objective] Converting slopes into terraces is a crucial soil and water conservation and agricultural measure on the Loess Plateau. Understanding the impact of terraced walls on soil water is conducive to preserving soil water and enhancing terrace ...
BAI Chenyun +5 more
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Shuitu Baochi Xuebao, 2004 20世纪以来，森林与坡面产流的研究取得长足进展，尤其是在我国研究得比较深入与广泛。观测实验仍然占绝对优势，径流小区实验仍是最广泛采用的方法。森林对坡面产流机制、坡面流态、产流量、产流过程、产流I临界值、地表径流与地下径流分割都有影响，以及森林枯落物层对径流都有重要影响。同时，坡面产流模型在森林水文学领域得到了应用。
王云琦 王玉杰 朱金兆 熊峰 肖江伟 吴云
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A New Method to Estimate the Cover Management Factor on the Loess Plateau in China [PDF]
[Objective] To investigate the combined effect of crop cover and crop management practices on preventing soil loss and improving the accuracy of C-factor estimation. [Methods] Six millet plots with different treatments, i.
LI Qinglan +4 more
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Shuitu Baochi Xuebao, 2018 采用人工模拟降雨的手段，在2种雨强（50，75 mm/h）、4种坡度（5°，10°，15°，20°）条件下，研究了雨强和坡度对黄土坡面土壤侵蚀和养分流失的影响。结果表明：（1）降雨强度从50 mm/h增大到75 mm/h，相同坡度的坡面开始产流时间提前了2.75~4.79 min。（2）随着雨强的增大，同一坡度的坡面径流量增加了12.53~15.80 mm/m2，增加幅度为1.24~1.31倍；同一坡度的坡面产沙量增加了0.47~3.61 kg/m2，增加幅度为0.77~2.90倍。坡面侵蚀过程中 ...
张, 李冬杰, 周
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Disaster mechanism and its deposition area of the Xiaochang gully debris flow in Hanyuan County industrial park [PDF]
Influenced by the 2013“4•20” Lushan earthquake, geological disasters occurred frequently along the Baiyan River Basin in Hanyuan County. At present, there is a large amount of loose material sources in the Xiaochang gully, posing a significant risk of ...
Guanglin HUANG +5 more
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, 2004 本文总结了植被及其不同部分在控制水土流失中的作用 ,在此基础上总结了利用植被控制水土流失的方法措施和目前的研究热点 ,并提出现状研究中的不足和将来的研究前景。福建省重大科技项目 (项目编号 :2 0 0 2H0 0 ...
黄云凤
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Shuitu Baochi Xuebao, 2017 坡面侵蚀产沙主要受坡面径流动态过程的影响，表征坡面径流过程特征是水力学特征参数。为了研究坡面侵蚀产沙与主要水力学特征参数的关系，揭示坡面侵蚀产沙的水动力学机理。采用人工模拟降雨的方式，通过不同坡长和雨强的组合试验，基于跨雨强和跨坡长的综合性分析的思路，应用经典水力学计算和统计拟合相结合的方法，对特定坡度（20°）下，5个坡长（1，2，3，4，5 m）13个降雨强度的试验监测数据进行了分析。结果表明：（1）在设计雨强（0.65~2.0 mm/min）和坡度范围内，坡面径流都属于缓流 ...
张锐波, 张丽萍, 付兴涛
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Shuitu Baochi Xuebao, 2020 通过野外径流小区人工降雨试验，研究坡形和聚丙烯酰胺（PAM）对径流量、土壤侵蚀和养分流失的影响。试验设置2个PAM施用量，分别为0，2 mg/L；9种坡形处理，即4个凹形坡，4个凸形坡，1个直形坡。结果表明：（1）与均匀坡面相比，凸形坡的平均土壤流失量、氨氮流失量和磷酸盐流失量分别增加25.12%，24.01%和26.96%，且土壤和养分流失量随着凸形坡面的凸度增加而增加，凹形坡的平均土壤流失量、氨氮流失量和磷酸盐流失量分别减小13.53%，10.85%和19.95%；（2 ...
邢伟民 +4 more
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