土壤水分特征曲线是土壤水分运动研究必不可少的环节之一。
The water retention curve is one of the essential links to study the soil water movement.
根据离心机法测定土壤水分特征曲线随温度和干密度的变化情况。
In the different temperature and dry-density, the soil-water characteristic curve is established by the centrifuge test.
土壤水分特征曲线是模拟水分和化学物质在非饱和土壤中运移的关键参数。
Soil water retention characteristics served as a vital parameter in modeling water movement and chemical transport in unsaturated soil.
说明：基于粒子群的神经网络优化算法的应用，在土壤水分特征曲线中的应用。
Neural network based on particle swarm optimization algorithm applied in the soil moisture characteristic curve application.
在区域尺度和定位观测的基础上，探讨了渭北塬区不同苹果种植分区的土壤水分特征。
Based on the data of regional scale and located field measurement, this paper investigated the soil moisture characteristics of the apple-planting subarea in Weibei dry highland, Shanxi Province.
负水头控制原理与多孔膜材料相结合提供了一种测定土壤水分特征曲线的新装置和新方法。
Principle of negative hydraulic head and multi-pore materials were used to put forward a new setup and method for the measurement of soil-water characteristic curve.
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.
不同烟区的土壤水分特征曲线在低吸力时都比较陡直，随着吸力的增加特征曲线逐渐趋于平缓。
Soil water characteristic curves in different tobacco fields decline rapidly in low suction condition and become smooth and slow while suction growing.
随着时间的增加，砂柱中的饱和度剖面逐渐接近于稳定时的饱和度剖面，对应于粗砂的土壤水分特征曲线。
As time progresses, the water saturation profile becomes closer to the steady-state profile, which corresponds to the soil-water characteristic curve of the coarse sand.
结果表明，该模型的计算值与实测值吻合的非常好，说明通过优化法确定非饱和土壤水分特征曲线是可行的。
The result shows that the values of computation agree with the experimental data fairly well through comparing calculating soil moisture characteristic curve with the experimental one.
本文简述了标定的原理、田间土壤水分特征曲线和非饱和导水率的标定方法，还给出了水分运动参数标定的实例。
In this paper, the concept and the method of scaling are described, and some examples of scaling of soil water characteristic curve and unsaturated hydraulic conductivity are given.
这一结果对于实际工作中根据风沙土壤颗粒大小分布的分形维数来预测沙漠风沙土壤水分特征曲线具有一定的指导意义。
This indicates that the sandy soil water retention curve can be predicted by the fractal model for sandy soil water retention curve.
土壤水分特征曲线是表征土壤中水的含量与势能之间的关系，是研究包气带土壤水分的保持和运移所用到的基本特性曲线。
Soil moisture curve is elementary curve that shows the relation between potential energy and the content of water soil and analyses retaining and transporting in soil water belt.
选择科尔沁沙地典型流动沙丘作为研究对象，分析了流动沙丘土壤水分的时空变化以及土壤水分特征常数的空间变化规律。
This paper analyzes the spatial and temporal variety regulation of soil moisture and soil moisture characteristic constants on mobile dune in Horqin sandy land.
采用回归分析方法建立了参数与土壤物理特性间的函数关系，为采用土壤颗粒组成等土壤物理特性确定土壤水分特征曲线提供了指导。
A fitted relationship between the parameters and the soil texture was established, with which the model parameters of soil water retention curves can be predicted by the soil physical characteristic.
本文主要综述了土壤空间变异研究的进展，包括土壤水分特征及状态参数、物理性质、化学性质、重金属及其它元素的空间变异研究。
This paper reviews advances in the research on soil spatial variability, including soil water characteristics, soil physical properties, chemical properties and heavy metal, etc.
在此基础上建立了基于土壤孔隙形态学特征的随机网络模型，在孔隙尺度模拟了土壤中的水分运动过程，并预测了近饱和土壤水分特征曲线。
A spatially-random network model by using measured pore morphology was then set up to simulate the pore scale flow processes, and to predict the soil water retention curve near saturation.
现存不同植物群落的土壤水分和养分特征对有效干预和调控植被恢复有着非常重要的参考价值。
The characteristics of soil water and nutrients in the existent vegetation communities are the very important references for intervening and regulating vegetation restoration.
以传统地面灌溉(畦灌)为对照，分析了喷灌条件下，冬小麦农田土壤水分分布特征和水量平衡。
The characteristics of soil water distribution and soil water balance of winter wheat were analyzed under sprinkler irrigation, with surface irrigation (border irrigation) as the control treatment.
结合不同处理下嘎拉幼苗生长特征可知，嘎拉幼苗良好生长的土壤水分条件应不低于田间持水量的60%。
After analyzing the growth characteristics of the seedling, it is found that the seedlings enjoyed growing under conditions of water content of soil was not lower than 60% of field capacity.
分析了高寒草甸地区冷季降水和土壤水分资源分布特征及其对牧草产量的可能影响。
The influence of cold season precipitation and soil moisture on herbage production in alpine meadow of Qilian mountains was analyzed.
土壤水分物理特征具有较明显的剖面垂直分布规律。
The soil water physical properties have obviously profile vertical distribution law.
建立了一维非饱和土壤水分垂向入渗的特征有限元数值模型。
The numerical model of one-dimensional vertical water infiltration through unsaturated soils is constructed by characteristic finite element method.
土壤水分物理特征具有明显的坡面分布规律。
The distribution law of the soil water physical properties along the slope side is obviously changeable.
丘间低地土壤水分变化特征表现为：水分变化频繁活动层，水分潜在供应层，水分相对稳定层。
The changing features of the soil water in the lowland around by sand dune are: the frequent changing layer, the potential supplying layer and the relatively stable layer.
并结合特征曲线方程，给出了土壤水分扩散率的表达式。
With the soil water characteristic curve, the expression of soil water diffusivity is also given in this paper.
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.
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.
土壤水分入渗特征参数的空间变异规律是区域尺度参数估值的基础。
Based on soil water infiltration experiments in corn field, this paper analysed and discussed yearly change characteristics of soil water infiltration.
土壤水分入渗特征参数的空间变异规律是区域尺度参数估值的基础。
Based on soil water infiltration experiments in corn field, this paper analysed and discussed yearly change characteristics of soil water infiltration.
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