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| 温度对简化蒸发法测定土壤水分特征曲线和导水率曲线的影响 | |
| 引用本文： | 张芳,张建丰,薛绪掌,毛思帅. 温度对简化蒸发法测定土壤水分特征曲线和导水率曲线的影响[J]. 水资源与水工程学报, 2012, 23(3): 114-120 |
| 作者姓名： | 张芳 张建丰 薛绪掌 毛思帅 |
| 作者单位： | 1. 西安理工大学教育部西北水资源与环境生态重点实验室,陕西西安710048;国家农业智能装备工程技术研究中心,北京100097 2. 西安理工大学教育部西北水资源与环境生态重点实验室,陕西西安,710048 3. 国家农业智能装备工程技术研究中心,北京,100097 |
| 基金项目： | 公益性行业(农业)科技专项 |
| 摘 要： | 根据Schindler(1980)提出的简化蒸发法,在微型土柱的两个高度安装张力计测定土壤吸力,并采用称重法得到土壤含水率,通过公式再计算土壤水分特征曲线和导水率曲线。结果表明:温度的差异影响土壤水分特征曲线和导水率曲线。在砂土、砂壤土-1和砂壤土-2的水分特征曲线上,当吸力小于10 kPa时,同一吸力时25℃曲线的含水率均小于16℃曲线的含水率;当吸力大于10 kPa时,砂土和砂壤土-2在同一吸力时25℃曲线的含水率均大于16℃曲线的含水率,而砂壤土-1无此变化。在砂土、砂壤土-1和砂壤土-2的导水率曲线上,砂土在10kPa以下时25℃导水率值低于16℃导水率值,其他情况下,在同一吸力时,三种土样的25℃导水率值均高于16℃导水率值。 |
| 关 键 词： | 简化蒸发法 土壤水分 土壤吸力 水分特征曲线 非饱和导水率 |
Effect of temperature on the simplifed evaporation method for measuring soil water retention curve and hydraulic conductivity curve |
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| ZHANG Fang , ZHANG Jianfeng , XUE Xuzhang , MAO Sishuai. Effect of temperature on the simplifed evaporation method for measuring soil water retention curve and hydraulic conductivity curve[J]. Journal of water resources and water engineering, 2012, 23(3): 114-120 | |
| Authors: | ZHANG Fang ZHANG Jianfeng XUE Xuzhang MAO Sishuai |
| Affiliation: | 1.Northwest Key Laboratory of Water Resources and Environment Ecology of Ministry of Education,Xi’an University of Technology,Xi’an 710048,China;2.National Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China) |
| Abstract: | According to the simplified evaporation method which proposed by Schindler(1980),two tensiometers were installed at two depths within a minitype soil column to measure the soil suction values,and using weighing method obtained the soil moisture in the minitype soil column.Then the hydraulic conductivity curve and water retention curve were caleulated by the formula.The results showed that temperature difference has obvious effects on hydraulic conductivity curve and water retention curve.The moisture content of 25℃’s curve is lower than that of 16℃’s curve at the same suction below the suction about 10kPa in the water retention curve of sand,loam and clay;the moisture content of 25℃’s curve is higher than that of 16℃’s curve at the same suction over the suction about 10kPa in sand and clay,but there is no variation in loam.The hydraulic conductivity of 25℃’s curve is higher than the hydraulic conductivity of 16℃’s curve at the same suction,the conductivity of the three kinds of soil samples at 25℃ is higher than that at 16℃. |
| Keywords: | simplified evaporation method soil water soil suction water retention curve unsaturated hydraulic conductivity |
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