| 杨艳芬,王全九,曾辰,刘建军,李涛.土石混合介质入渗模型及其参数影响因素研究[J].干旱地区农业研究,2010,28(1):6~10 |
| 土石混合介质入渗模型及其参数影响因素研究 |
| Study on the infiltration model and factors affecting the parameters of stony-soil |
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| DOI：10.7606/j.issn.1000-7601.2010.01.02 |
| 中文关键词: 土石混合介质 碎石含量 水分运动参数 水分运动模型 模型适用性 |
| 英文关键词:stony-soil media rock fragment content water movement parameters water movement model applicability of the model |
| 基金项目:国家科技支撑项目（2007BAD38B03）；新疆自治区重大专项（200731136-5）；国家自然科学基金项目（50879067） |
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| 中文摘要: |
| 选取4种碎石含量、5种碎石粒径，将纯土作为对照，共进行20组一维积水入渗试验和20组实测饱和导水率试验，分析了碎石含量对土石混合介质水分运动参数的影响以及水分运动模型的适用性。结果表明：Green-Ampt入渗公式、Philip入渗公式、垂直一维代数模型中个别参数随碎石含量的增加呈先减小、再增大、后减小的趋势；模型的适用性因碎石粒径而异，粒径在0.5～3 cm时，垂直一维代数模型可以相对准确地描述土石混合介质的饱和导水率，粒径为3～5 cm时，Green-Ampt公式所描述的饱和导水率精度较高。 |
| 英文摘要: |
| Four kinds of rock fragment content and five kinds of particle size were chosen and pure soil was used as control, and 20 groups of one dimensional vertical ponding infiltration experiments and 20 groups of measured saturated hydraulic conductivity experiments were conducted to analyze the effect of rock fragment content on water movement parameters of stony-soil media and the applicability of water movement model. The major findings are as follows: some parameters in Green-Ampt formula, Philip formula and one dimensional vertical algebraic model decrease with the increase of rock fragment content at first, and then increase, and decrease again at last. The applicability of the model is different from rock fragment particle size. When the particle size is between 0.5～3 cm, one dimensional vertical algebraic model could describe with relative accuracy of the saturated hydraulic conductivity of stony-soil media, and the saturated hydraulic conductivity of stony-soil media described by Green-Ampt formula has higher precision when the particle size is 3～5 cm. |
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