| 黄土坡面薄层流侵蚀过程试验研究 |
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| 引用本文： | 刘俊娥,王占礼,袁殷,张宽地,高素娟,陈浩. 黄土坡面薄层流侵蚀过程试验研究[J]. 水土保持通报, 2010, 30(3): 27-30 |
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| 作者姓名： | 刘俊娥 王占礼 袁殷 张宽地 高素娟 陈浩 |
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| 作者单位： | 1. 西北农林科技大学,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100
2. 西北农林科技大学,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;中国科学院,水利部,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,陕西,杨凌,712100 |
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| 基金项目： | 国家自然科学基金项目，国家973计划项目，中科院知识创新工程重要方向项目，黄土高原土壤侵蚀与旱地农业国家重点实验室自主研究项目 |
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| 摘 要： | 研究黄土坡面薄层流侵蚀过程对于深化黄土坡面土壤侵蚀过程有重要意义.采用人工模拟降雨试 验方法,对黄土坡面薄层流侵蚀过程进行了研究.(1)不同雨强条件下,薄层流侵蚀随降雨过程的变化相似,都随降雨历时的增长呈递增趋势,可用幂函数方程进行描述;(2)不同坡度条件下,薄层流侵蚀模数皆随雨强的增大而增大,可用线性相关方程进行描述;(3)不同雨强条件下,薄层流侵蚀模数随坡度的增加总体呈先增大后减小的趋势,侵蚀模数随坡度变化的关系可以用对数线性相关方程进行描述;(4)不同雨强条件下,薄层流侵蚀随坡长的增加可用对数线性方程进行描述;(5)不同雨强、坡度、坡长条件下,坡面薄层流侵蚀变化可用三元线性经验方程表述.其中降雨强度对侵蚀的影响最大,其次是坡度,坡长对其的影响最小.
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| 关 键 词： | 黄土坡面 薄层流 侵蚀 雨强 坡度 坡长 |
| 收稿时间： | 2009-12-23 |
| 修稿时间： | 2010-03-10 |
Experimental Study of Sheet Flow Erosion Processes on Loess Hillslope |
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| LIU June,WANG ZhanLi,YUAN Yin,ZHANG Guandi,GAO Sujuan and CHEN Hao. Experimental Study of Sheet Flow Erosion Processes on Loess Hillslope[J]. Bulletin of Soil and Water Conservation, 2010, 30(3): 27-30 |
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| Authors: | LIU June WANG ZhanLi YUAN Yin ZHANG Guandi GAO Sujuan CHEN Hao |
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| Affiliation: | The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: | To reveal the mechanisms of soil erosion by sheet flow is important for the understanding of erosion processes on loess slope. With artificially simulated rainfall tests, sheet flow erosion processes on loess hill slope are studied and the follow ing results are obtained: ( 1) Under different rainfall intensities, sheet flow erosion varied similarly with rainfall process and can be described with power functions. Sheet flow erosion increased with rainfall duration increasing. ( 2) Under different slope gradients, sheet flow erosion increased with rainfall intensity increasing and can be described by linear equations. ( 3) Under different rainfall intensities, sheet flow erosion modulus increased firstly and then decreased with soil gradient increasing. Their relationship can be described by log-linear equations. ( 4) Under different rainfall intensities, the relationship can be descried by power equations. ( 5) Under different rainfall intensities, slope gradients, and slope lengths, sheet flow erosion can be described by ternary linear equations. Rainfall intensity affected erosion modulus most greatly, followed by slope gradient, and slope length behaved minimal impacts. |
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| Keywords: | loess slope sheet flow erosion rainfall intensity slope gradient slope length |
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