| 贡嘎山暗针叶林生态系统土壤优先流研究初探 |
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| 引用本文： | 牛健植,余新晓,张志强. 贡嘎山暗针叶林生态系统土壤优先流研究初探[J]. 北京林业大学学报, 2008, 0(Z2) |
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| 作者姓名： | 牛健植 余新晓 张志强 |
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| 作者单位： | 水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院; |
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| 基金项目： | 国家自然科学基金项目(30471379); 高等学校博士学科点专项科研基金项目(20060022002) |
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| 摘 要： | 优先流是一种常见的土壤水分运动形式,近年来被应用到不同科学领域,但目前仍然没有国际认可的标准定义。以非饱和带土壤水分运动规律为基础,该文利用自制实验仪器,开展室内土柱实验,与野外实地示踪影像分析相结合对贡嘎山暗针叶林生态系统进行优先流研究。研究采用示踪标定及示踪影像等方法,结合作者前期雷诺数计算分析,判定出研究区域土壤水分流动有优先流现象发生,并初步判定优先流类型是管流。同时采用驻留力矩分析穿透曲线(BTC)的平均穿透时间以及蔓延扩散和拖尾程度,结果表明优先流的穿透曲线具有不对称性。
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| 关 键 词： | 暗针叶林生态系统 流态 优先流 示踪映像分析 穿透曲线 水分含量 |
Soil preferential flow in the dark coniferous forest ecosystem of Gongga Mountain,Sichuan Province of southwestern China |
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| NIU Jian-zhi,YU Xin-xiao,ZHANG Zhi-qiang.Key Laboratory of Soil , Water Conservation , Desertification Combating of Ministry of Education,School of Soil , Water Conservation,Beijing Forestry University,,P.R.China.. Soil preferential flow in the dark coniferous forest ecosystem of Gongga Mountain,Sichuan Province of southwestern China[J]. Journal of Beijing Forestry University, 2008, 0(Z2) |
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| Authors: | NIU Jian-zhi YU Xin-xiao ZHANG Zhi-qiang.Key Laboratory of Soil Water Conservation & Desertification Combating of Ministry of Education School of Soil Water Conservation Beijing Forestry University P.R.China. |
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| Affiliation: | NIU Jian-zhi,YU Xin-xiao,ZHANG Zhi-qiang.Key Laboratory of Soil , Water Conservation & Desertification Combating of Ministry of Education,School of Soil , Water Conservation,Beijing Forestry University,100083,P.R.China. |
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| Abstract: | Research on preferential flow is involved with the mechanism of soil water movement from homogeneous to heterogeneous fields,and can answer a number of key questions that cannot be explained by Darcy's law and the Convective-Diffusive Equation in early hydrological researches.Experimental or technological analyses are difficult because this movement cannot be easily detected.The authors studied the characteristics of soil water flow and preferential flow of the fast water movement in the root zone,supported... |
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| Keywords: | Gongga Mountain dark coniferous forest forest ecosystem soil water movement preferential flow water content |
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