期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
地下非饱和土壤中水分水平扩散的试验探究和模型拟合 被引量:1
1
作者 胡韬 吴本霞 余星吉 《环保科技》 2021年第4期1-7,共7页
非饱和土中水分的运移研究在实际的修复工程中具有重要的理论指导作用。为了研究在修复工程中遇到的药剂溶液在污染土中的扩散问题,本文利用自制室内试验设备进行了药剂溶液在非饱和土柱的水分水平扩散模拟试验,研究土压(围压)对水分在... 非饱和土中水分的运移研究在实际的修复工程中具有重要的理论指导作用。为了研究在修复工程中遇到的药剂溶液在污染土中的扩散问题,本文利用自制室内试验设备进行了药剂溶液在非饱和土柱的水分水平扩散模拟试验,研究土压(围压)对水分在土中扩散能力的影响。试验结果表明,围压对水分扩散的影响是先促进后抑制的。在此基础上,采用分形理查兹方程(FRE)模型拟合含水率曲线。结果表明,FRE模型对本组室内扩散试验有较好的拟合效果,为地下非饱和土中溶液扩散的模拟提供了模型支持。同时,利用反映物理意义的拟合参数的变化分析了实验规律及现象的机理。 展开更多
关键词 土壤修复 一维水平扩散 室内试验 数学模型
下载PDF
Improvement of the One-dimensional Vertical Advection-diffusion Model in Seawater
2
作者 王保栋 单宝田 +1 位作者 战闰 王修林 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2003年第1期34-39,共6页
The classical 1-D vertical advection-diffusion model was improved in this work. The main advantages of the improved model over the previous one are: 1) The applicable condition of the 1-D model is made clear in the im... The classical 1-D vertical advection-diffusion model was improved in this work. The main advantages of the improved model over the previous one are: 1) The applicable condition of the 1-D model is made clear in the improved model, in that it is substantively applicable only to a vertical domain on which two end-member water masses are mixing. 2) The substitution of parameter f(z) in the equation of the classical 1-D model with end-member fraction f 1z makes the model more precisely and easily solved. 3) All the terms in the improved model equation have specific physical meanings, which makes the model easily understood. Practical application of the improved model to predict the vertical profiles of dissolved oxygen and micronutrients in abyssal ocean water of the North Pacific proved that the improvement of the 1-D advection-diffusion model is successful and practicable. 展开更多
关键词 D advection-diffusion model vertical profile dissolved oxygen NUTRIENT North Pacific
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部