| 梁嘉平,史文娟,王全九.添加γ-聚谷氨酸条件下Philip模型与Green-Ampt入渗模型的对比分析[J].干旱地区农业研究,2017,35(3):74~79 |
| 添加γ-聚谷氨酸条件下Philip模型与Green-Ampt入渗模型的对比分析 |
| Comparison analysis of Philip model and Green-Ampt infiltration model under condition of added γ-PGA |
| |
| DOI：10.7606/j.issn.1000-7601.2017.03.12 |
| 中文关键词: γ-聚谷氨酸 Philip模型 Green-Ampt模型 土壤入渗 |
| 英文关键词:γ-poly glutamic acid Philip model Green-Ampt model soil water infiltration |
| 基金项目:国家自然科学基金资助项目(51379173)；新疆维吾尔自治区科技计划项目(2011301033) |
|
| 摘要点击次数: 1152 |
| 全文下载次数: 471 |
| 中文摘要: |
| 干旱加剧及土壤退化严重，使新型保水剂γ-聚谷氨酸（γ-PGA）的应用在农田节水灌溉中开始暂露头角。基于室内垂直一维入渗试验，在分析了γ-PGA对土壤水分入渗能力的影响的同时还对Philip模型和Green-Ampt入渗模型进行对比分析。结果表明：与未施加聚谷氨酸的处理（对照组）相比，随着γ-PGA施量的增加，累积入渗量和入渗率均呈单调递减趋势；两个入渗模型的拟合结果显示：Philip公式中，吸渗率呈减小趋势，Green-Ampt公式中，饱和导水率、饱和导水率与土壤水吸力的乘积都呈减小趋势，但土壤水吸力无明显变化。Philip模型与Green-Ampt入渗模型的对比分析结果表明：利用模型参数互推关系计算的Philip模型计算参数与拟合参数的一致性较好，而Green-Ampt模型的计算参数与拟合参数的一致性较差；利用Philip模型计算参数计算的累积入渗量与实测累积入渗量之间的吻合程度高，均方根误差小于0.5，而利用Green-Ampt模型计算参数计算的累积入渗量与实测累积入渗量之间的吻合程度较差，均方根差均大于0.5。说明在添加保水剂的条件下采用Philip入渗模型确定入渗参数时较为精确。 |
| 英文摘要: |
| The application of γ-poly glutamic acid is gradually budding in water-saving irrigation, because of aggravating drought and severe soil degradation. Based on the vertical one-dimensional infiltration experiment in laboratory, analyzed the effect of γ-PGA on soil water infiltration and carried out the comparative analysis of Philip model and Green-Ampt infiltration model. The results indicated that: Compared with the control group as the treatment of no added γ-PGA, both the cumulative infiltration volume and infiltration rate total presented a monotonic decreasing trend along with increasing γ-PGA amount. The fitting results by two infiltration models were showed that: The suction and infiltration rate was presented a decreasing trend in Philip formula. The saturated hydraulic conductivity, the product by saturated hydraulic conductivity with soil water suction total presented a decreasing trend, but the soil water suction was no obvious change in Green-Ampt formula. Moreover, the results of comparison analysis by Philip model and Green-Ampt infiltration model were indicated that: The consistency of fitting parameters and calculating parameters were good in Philip model, but the consistency of parameters in Green-Ampt model was poor. The coincidence degree of the cumulative infiltration volume calculated by Philip model parameter with the measured cumulative infiltration volume was high, the root mean square error was less than 0.5. But the coincidence degree of the cumulative infiltration volume calculated by the Green-Ampt model parameters with the measured cumulative infiltration volume was poor, the root mean square error was large than 0.5. It was explained that using the Philip infiltration model should be more accurate to determine the infiltration parameters under the conditions of added γ-PGA. |
| 查看全文 查看/发表评论 下载PDF阅读器 |