| 坡耕地地表糙度对降水分配的实验研究 |
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| 引用本文： | 郭建华,吴发启,梁心兰,刘淼.坡耕地地表糙度对降水分配的实验研究[J].水土保持研究,2008,15(3):11-14,19. |
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| 作者姓名： | 郭建华 吴发启 梁心兰 刘淼 |
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| 作者单位： | 西北农林科技大学 资源环境学院, 陕西 杨陵 712100 |
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| 摘 要： | 地表糙度指地表微小的高低起伏变化，是人为土地管理与土壤侵蚀共同作用的结果，可以影响降雨过程中水分转化与土壤侵蚀过程。该文以直线坡为对照，借助3种常见耕作管理措施（人工锄耕、人工掏挖与等高耕作）产生不同水平的地表糙度，结合人工模拟降雨试验研究地表糙度水分转化效应。结果表明:长历时人工降雨条件下，地表糙度可以强化降雨向土壤水分转化。其强化入渗作用表现为:增加地表填洼量，增大入渗水头与入渗深度，滞后产流时间，削减径流量，进而提高入渗率及水分转化率。坡耕地地表糙度与填洼量成指数关系，与平均入渗率及水分转化率成对数关系。
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| 关 键 词： | 地表糙度 填洼量 产流时间 入渗率 水分转化 |
Effects of Soil Surface Roughness on Water Transformation in Cultivated Land |
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| GUO Jian-hua,WU Fa-qi,LIANG Xin-lan,LIU Miao.Effects of Soil Surface Roughness on Water Transformation in Cultivated Land[J].Research of Soil and Water Conservation,2008,15(3):11-14,19. |
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| Authors: | GUO Jian-hua WU Fa-qi LIANG Xin-lan LIU Miao |
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| Institution: | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: | Soil surface roughness is micro-topography of cultivated soils caused by land management and soil erosion.It plays a critical part in controlling soil water transformation and soil erosion.Several tillage operations were studied:artificial hoe slope,artificial dig slope,contour tillage slope and straight slope.Based on the experiments of simulated rainfall,this article assessed the effects of surface roughness on soil water transformation.Results showed that soil surface roughness can increase depression storage capacity,enhance infiltration rate and wetting front depth,retard runoff-yielding time,decrease runoff volume,and finally improve water transformation rate.The relationship between surface roughness and depression storage was logarithm,and the relationship between average infiltration rate and water transformation rate was liner. |
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| Keywords: | soil surface roughness depression storage capacity runoff-yielding time infiltration rate water transformation |
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