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土壤溶质
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  soil solute
     Analysis of two-region model and two-flow domain model for soil solute transport
     土壤溶质迁移的两区模型与两流区模型对比分析
短句来源
     Actualities of Soil Solute Transportation Study
     土壤溶质运移研究现状
短句来源
     Nutrient migration and soil salinisation are the two major concerns in the research of soil solute transport.
     土壤养分运移和土壤次生盐碱化都是土壤溶质运移领域研究的主要内容,而且土壤养分运移研究起源于土壤水盐运动的研究理论。
短句来源
     Simulation and Prediction of Soil Solute Transport on the Basis of Artificial Neural Network
     基于人工神经网络的土壤溶质运移模拟与预测
短句来源
     Simulation and Prediction of Soil Solute Transport on the Basis of Artificial Neural Network
     基于人工神经网络的土壤溶质运移模拟与预测
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  “土壤溶质”译为未确定词的双语例句
     Numerical model of characteristic finite element for solute transport through layered soils
     分层土壤溶质运移的特征有限元数值模型
短句来源
     An Experimental Study on Solute Front Transport in Soil and Parameter Estimate
     土壤溶质锋运移及参数估计的实验研究
短句来源
     In simulating nitrogen transport, NO3-, NH4+, and urea were taken as soil solutes and their vertical movement were simulated by convection-dispersion equation;
     在N素运移中将土壤中的NH4+、NO3-和尿素视为土壤溶质,用对流弥散方程模拟其在垂直方向上的运移;
短句来源
     Study on Boundary-layer Theory of Solute Transport in Soil
     土壤溶质运移边界层理论的研究
短句来源
     Theory and Application Research of Determining Parameters of Solute Transport in Soils
     土壤溶质运移参数估计理论与应用研究
短句来源
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  相似匹配句对
     Analytical Solution to Advance of Solute Front in Soils
     土壤溶质锋运移的解析解
短句来源
     Actualities of Soil Solute Transportation Study
     土壤溶质运移研究现状
短句来源
     And thus function could not be ignored in the soil water and salt movement and redistribution in saline grassland.
     土壤含水.
短句来源
     soil fertility;
     土壤肥力;
短句来源
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  soil solute
Field Validation of Soil Solute Profiles in Irrigated Cotton
      
Basic elements of WHNSIM are differential equations that describe soil water, soil heat and soil solute transport.
      
Soil solute transport parameters are usually measured at the pedon scale, but predictions of transport at the polypedon scale are often required.
      
Soil solute concentration and water uptake by single lupin and radish plant roots
      
Soil solute concentration and water uptake by single lupin and radish plant roots
      
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Based on the experiment of the soil water-salt movement,a mathemat-ical model of solute transport in soils under influnce of soil absorption andimmobile water and a mathematical model of soil water movement were used.After compared with the numerical solutions of solute convection-diffusi onequation in the one-dimensional saturated-unsaturated soil under evaporationcondition,the numerical method of the Characteristic Method combined withFinite Element scheme (CMFE) was used to calculate and simulate solutetransfer...

Based on the experiment of the soil water-salt movement,a mathemat-ical model of solute transport in soils under influnce of soil absorption andimmobile water and a mathematical model of soil water movement were used.After compared with the numerical solutions of solute convection-diffusi onequation in the one-dimensional saturated-unsaturated soil under evaporationcondition,the numerical method of the Characteristic Method combined withFinite Element scheme (CMFE) was used to calculate and simulate solutetransfer through the saturated and unsaturated soils systematically underirrigation (infiltration),evaporation and redistribution conditions.

本文在水盐运移实验基础上,正确地采用了考虑土壤不动水体与吸附作用的溶质运移数学模型和以v为因变量的土壤水分数学模型。在非饱和蒸发条件下对各种求解溶质运移方程的数值方法进行了系统比较,采用了适合于本研究特征—饱和—非饱和流的特征—有限元法对灌溉入渗、蒸发和再分配条件下饱和—非饱和土壤溶质运移规律作了较系统的计算机数值模拟与预测研究。

The study of hydrodynamic dispersion coefficients of soil moisture are summarized and the mothods used to compute the coefficients are discussed. According to the results achieved abroad, some opions on the application of models are putforward.

本文概述了国内外水动力弥散系数的研究情况,并对其计算方法加以评述,结合国外最新研究成果,提出模型应用的几点看法。随着农业生产的发展和农业科学技术水平的提高,要求农田合理施肥,经济灌溉和有效预测、控制土壤盐碱化,防止农药,化肥及废水灌溉引起土壤和地下水污染,以及土壤溶质随地表径流迁移,引起水环境污染和土壤生产力降低,已成为当今世界普遍关注的问题。对此研究涉及到对土壤溶质的研究。对土壤溶质研究最广泛是利用数学模型,模拟土壤溶质运动,其水动力弥散系数是不可缺少的参数之一。水动力弥散系数由扩散系数和机械弥散系数组成。

It can not be neglected that the influence of soil absorption and immo- bile water upon the solute transfer process in the salinized soil of deposit plain in the north of China.In accordance with solute dynamic model (hyperbolic partial differential control equation)in the salinized soil under the influence of the soil absorption and immobile water comparison study of three numerical solutions and their application conditions Was # reported in this paper,#(1)the Bresler's scheme,(2)quadratic up-stream interpolation...

It can not be neglected that the influence of soil absorption and immo- bile water upon the solute transfer process in the salinized soil of deposit plain in the north of China.In accordance with solute dynamic model (hyperbolic partial differential control equation)in the salinized soil under the influence of the soil absorption and immobile water comparison study of three numerical solutions and their application conditions Was # reported in this paper,#(1)the Bresler's scheme,(2)quadratic up-stream interpolation difference scheme,(3)characteristic method combined # with finite element scheme·# That can be used in mornitoring and forecast sim ulation for the dynamic state of the distract soil salt.

我国北方沉积平原盐渍化土壤中的溶质运移过程,土壤吸附作用与不动水体的影响不允忽视,本文针对盐渍化土壤溶质动态模型—双曲型偏微分控制方程,给出在考虑土壤吸附作用与不动水体影响下的(1)Bresler 对时间导数取高次近似的差分法;(2)二次迎风隐式差分法;()特征—有限元法等3种数值解法及比较研究与应用条件,可供灌区土壤溶质动态监测与预报模似应用。

 
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