这些问题有利地促进了土壤溶质运移的研究。
Those issues have advantageously-promoted the research of solute transport in soils.
土壤质地和溶质性质对土壤溶质地表迁移过程有较大影响。
The soil solute transport with surface runoff and sediment was greatly impacted by the soil texture and solute character.
土壤溶质运移模型是研究土壤中农用化学物质迁移的一种重要手段。
The solution transport model is a key method for the study of the movement of agri- chemicals in soils.
获取土壤溶质迁移参数是利用数学模型预测土壤溶质迁移过程的前提。
Acquisition of soil solute transport parameters is a pre-condition for predicting solute transport using the numerical model in practice.
农业非点源污染主要由降雨径流、土壤侵蚀、地表溶质溶出和土壤溶质渗漏4个过程形成。
Agricultural non-point pollution is formed by 4 processes of rainfall runoff, soil erosion, surface solution stripping and soil solution seepage.
构造模型进行预测的关键在于确定模型参数，在土壤溶质运移模型中一般包括弥散系数和延迟因子两个参数。
The key to establish model and predict lies in the determination of model parameters, which include generally dispersion coefficient and retardation factor.
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。
Under certain soil texture, bulk density and water content of soil, moving time and distance of soil solute were regarded as the main parameters on soil solute transport.
张力渗透仪是一种根据多维入渗原理进行土壤水分和溶质运移参数原位测量的仪器。
Tension infiltration meter is a kind of devices measuring soil moisture and solute movement parameters on the spot according to multi-dimensional infiltration theory.
LEACHC是描述土壤水分运动、溶质运移和盐分积累的盐度模型。
LEACHC is the salinity model describing water flow, solute movement and salt accumulation in soil profiles.
灌溉后，土壤中溶质运移受多因素影响。
After irrigation, the soil solute migration was affected by many factors.
降雨次数和降雨量是左右溶质在土壤剖面中沉积位置高低的决定性因素。
Rainfall frequency and amount are thus crucial factors in determining the position of deposition in a soil profile.
土壤水力性质是研究非饱和带中水分和溶质运移的重要参数，可以用孔隙网络模型进行预测。
Soil hydraulic properties are the key information required in quantitatively modeling water flow and solute transport in the vadose zone, which can be predicted using pore scale network models.
田块尺度土壤特性的空间变异性对水分与溶质运移具有明显的影响。
The field scale spatial variability of soil properties is one of the key factors which have considerable effect on water flow and solute transport.
联合模型包括水运动模型和溶质运动模型两部分，综合考虑磷在土壤中迁移、转化和沉淀等过程。
The united model consists of water model and phosphorus solute model, so transfer, transformation and precipitation can be considered synthetically.
土壤中普遍存在的大孔隙使水及溶质快速穿过土壤，污染地下水，确定土壤大孔隙流性质需要大量的野外和室内实验。
Water and solutes go fast through the macropores in soil and pollute groundwater. Field and laboratory tests are needed to determine the macropore flow properties.
确定土壤大孔隙结构，可以很好地理解和预测水及溶质在有大孔隙土壤中的运移，保护地下水环境。
Determining the structure of macropore can better understand and predict the behavior of water and solutes in macroporous soil, and help to protect the environment of underground water.
据此研究了小区域范围内土壤水分和溶质的运移特征，讨论了土壤水分和盐分分布的空间变异性和统计特征。
Soil water movement and solute transport in the local scale were studied and the spacial variability of soil water content and concentration were discussed.
土壤开裂是一个复杂的物理过程，裂缝形成对土壤性状、作物生长以及水分溶质运输均有重要影响。
Soil cracking is a complicated process, which has great influence on soil properties, vegetation growth and soil solute transportation.
由于自然和人为因素作用，土壤常常呈现层状结构，这种层状结构影响土壤水分和溶质的运移特性。
Because of the nature and human's activity, soil often takes on layered phenomena. The layered structure influence the feature of water and solute transport.
应用特征有限元法对一维非饱和分层土壤水分入渗方程及溶质运移方程进行离散化，得到了其特征有限元数值模型。
The numerical model of 1-d water infiltration and solute transport through layered soils is constructed by the characteristic finite element method.
基于土壤中溶质运移的对流弥散方程(CDE)提出了溶质运移参数估计的图解方法。
A graphing method is proposed in this paper for estimating parameters of solute transport in soils based on the convection-dispersion equation (CDE).
建立了一维非饱和土壤中水平和垂向溶质运移的有限体积法数值模型。
The numerical model of one-dimensional horizontal solute transport and vertical solute transport through unsaturated soils is formulated by FVM.
土壤水和溶质迁移的数学模型，可分别由水分运动、溶质运移两个方程耦合组成。
The mathematical model of solute and water transport is composed of two coupled equations of water movement and solute transfer.
建立了一维非饱和土壤中溶质运移的特征有限元数值模型。
The numerical model of one-dimensional solute transport through unsaturated soils is formulated by characteristic finite element method.
土壤大孔隙是普遍存在的现象，并非例外，它对水及溶质在土壤中的运移有着深刻影响。
Macropores in soil are general phenomena rather than the exception, they have greatly influence on the movement of water and solutes within soil.
土壤水分特征函数空间异质性是定量研究土壤非饱和带水分运动以及溶质运移的先决条件。
Spatial variability of soil water retention function is a primary prerequisite for quantitative research on water movement and solution transfer in unsaturated zone.
土壤大孔隙结构对土壤中水流及溶质运移以及地下水环境有着深刻影响。
The structure of macropore plays an important role in water flow and solutes transport in soil, and influences the environment of underground water.
可溶性化学物质在土壤中的运移和分布一般可以反映出多孔介质中溶质随着水分运(流)动的规律。
The transport and distribution of dissolved chemicals are influenced by water movement in the soil system.
由土壤孔隙水流速率差异引起的热弥散和溶质弥散对于了解水热盐耦合运移非常重要。
Thermal dispersion and solute dispersion, resulting from the discrepancies of pore water velocity, are important parameters in studying water, heat, and solute transport in porous media.
土壤作为一种由惰性固体、活性固体、溶质、气体以及水组成的多元复合系统，决定了其物理特性实验研究的复杂性。
Due to the fact that soil is the mixture of solid, liquid and air, the difficulties and complexities in studying soil physics may be diverse.
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