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湿润峰
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  wetting front
     The migration of CO 2 in soil was simulated through use of soil column, especially the transformation of CO 2 between water and gas phases at wetting front was studied.
     利用土柱实验装置模拟CO2 在土壤中的迁移转化规律 ,重点研究湿润峰处水、气二相间污染物转化 .
短句来源
     According to the determined result,the text analyze characteristics of soil water movement,such as the increased rate of the wetting front,the course of soil water content movement of the characteristic point,soil water distribution during irrigation and soil water redistribution after irrigation in wetting region.
     根据测定结果,分析了在滴灌条件下湿润峰的运移速率、特征点的土壤含水率变化过程、湿润体内土壤水分的分布以及停止灌水后湿润体内水分的再分布等土壤水分运动特征。
短句来源
     The relationships of cumulated infiltration capacity and infiltration rate with the wetting front of infiltration were consistent with the Philips mathematical model.
     3种紫色土的累积入渗量(I)、入渗率(f)与湿润峰(Xf)的关系符合Philip数学模型;
短句来源
     In order to calculate the soil unsaturated conductivity of three different kinds of soil types on loess plateau under different temperature conditions,the quantitative experiments have studied the relations between characteristic curve and temperature factors, the relations between wetting front infiltrating speed,the water content of wetting front and average water content seperately.
     为计算黄土高原3种土壤不同温度下的非饱和土壤导水率,采用土壤水分动力学方法和数值模拟,利用室内试验分别对3种土壤在不同温度下的土壤水分特征曲线,湿润峰下渗速率以及湿润峰湿度与湿润剖面平均湿度的关系进行了定量研究。
短句来源
     In the course of the soil water redistributions after stopping irrigating,wetting front is passing to the outside constantly,and the soil water content of wetting layer increase in the beginning,and soil water content in the wetting region is generally reduced on later stage,and the region where the soil water is higher shifts down gradually,and soil water content is relatively stable to reach finally.
     供水停止后土壤水分再分布过程中,土壤湿润峰面不断向外部推移,湿润层土壤含水量开始有所增加,后期湿润体内的土壤含水量普遍降低,高含水区逐渐下移,最后达到相对稳定。
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  wetted front
     Experimental Research about the Wetted Front of Mulch-Trickle Irrigation for Cotton
     棉花膜下滴灌湿润峰的试验研究
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  “湿润峰”译为未确定词的双语例句
     Most of the NO_3~- -N is eluted to the deeper soil and got collected.
     水分和NO_3~- -N湿润峰的推移速率与灌溉定额均呈对数关系。
短句来源
     At the same time, the article described the latest experimental research achievement from the aspects of wetness shape, movement of soil water, flux of emitter, irrigation schedule, and so on.
     同时,文章就地下滴灌条件下土壤水分运动的试验研究展开了论述,从湿润体的形状、湿润峰的运移、滴头流量及灌溉制度等方面介绍了近年来一些学者的研究成果。
短句来源
     The parameters of Gardner_Russo model for describing the soil retention curves are obtained based on the movement rules of horizontal one_dimensional soil water infiltration.
     本文基于水平一维非饱和土壤水分运动规律,推求了Gardner_Russo持水曲线模型参数,获得了水平一维非饱和土壤水分运动中累积入渗量、入渗率、湿润峰、入渗时间之间的理论关系。
短句来源
     Through analyzing the types of the preferential flow in the study area, it indicates that the perceptible type of the preferential flow in young, mid-aged and over-mature is the approximate connected macropore flow and the one in the mature forest soil is unsaturated gravitational flow which is dominated by wetness front.
     对研究区域优先流类型开展研究,研究结果表明幼龄林、中龄林及过熟林冰碛物土壤中的优先流类型是近乎连通的大孔隙流,成熟林坡积物土壤中的优先流类型是湿润峰占主导地位的非饱和重力流。
短句来源
     (1971)experimental condition. The simulated results agree to Warrick results. However,the results of FEM were more closed to Warrick results than FDM ones at the wet peak in the soil profile.
     并将计算程序对 Warrick等试验状态下的土壤水分动态进行模拟对比 ,结果显示两程序具有较高精度 ,总体上 FEM和 FDM模拟结果均与试验值具有较好的一致性 ,但 FEM结果在湿润峰处较 FDM结果更接近试验值。
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  wetting front
The transition of part of the free moisture into the bound state is taken into account by using a boundary condition on the wetting front.
      
The article discusses the one-dimensional problem of the leaching of a soil with piecewise-homogeneous initial salinization under conditions of a movable wetting front.
      
The minimum rainfall intensity and the minimum rainfall duration needed to infiltrate to the wetting front depth are calculated based on the Green-Ampt model.
      
As an example, we discuss more specifically the case of wetting of heterogeneous surfaces, where the change from a strong to a weak pinning regime could be induced in the wetting front by varying the surface tension of the liquid-air interface.
      
In this comment, we present a detailed theory of this process, supported by numerical calculations, confirming their conclusion that the wetting front moves with the square root of time.
      
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In order to calculate the soil unsaturated conductivity of three different kinds of soil types on loess plateau under different temperature conditions,the quantitative experiments have studied the relations between characteristic curve and temperature factors, the relations between wetting front infiltrating speed,the water content of wetting front and average water content seperately.The results are described as follows:(1)Established three quantitative models in predicting unsaturated soil water conductivity...

In order to calculate the soil unsaturated conductivity of three different kinds of soil types on loess plateau under different temperature conditions,the quantitative experiments have studied the relations between characteristic curve and temperature factors, the relations between wetting front infiltrating speed,the water content of wetting front and average water content seperately.The results are described as follows:(1)Established three quantitative models in predicting unsaturated soil water conductivity of three soil types on loess plateau,K(θ)=ΔTaθb+KTre,and the models provided theoretical basis for finding out the dynamic change and appraising the availability of soil water.(2)Based on these models, the net increase of soil available water and soil unsaturated conductivity of different water content have been calculated with 1℃ increase of temperature and the clearer quantitative models of directly calculating temperature effect have been derived.

为计算黄土高原3种土壤不同温度下的非饱和土壤导水率,采用土壤水分动力学方法和数值模拟,利用室内试验分别对3种土壤在不同温度下的土壤水分特征曲线,湿润峰下渗速率以及湿润峰湿度与湿润剖面平均湿度的关系进行了定量研究。得到了以下结果:(1)建立了黄土高原3种土壤非饱和土壤导水率温度效应的定量模型:K(θ)=ΔTaθb+KTre,本模型为了解田间土壤水分的动态变化及评价土壤水分有效性提供了理论依据。(2)在已有模型的基础上,计算了不同含水量下,温度升高1℃所引起非饱和土壤导水率和土壤有效水的净增加量,并推导出更为直观的温度对土壤水分传导有效性影响的定量模型,可以直接计算不同温度下非饱和土壤导水率的温度效应。

Drip irrigation was carried out under the conditions of various flow and irrigation quantity in two kinds of soil.By measuring the shift of soil moist peak and the relation among drip irrigation flow,irrigation quantity and maximum moist diameter in the vertical and horizontal direction were established ,which can be expressed as D(H )=(a+b q)Q c.The design parameters of drip irrigation,such as interval distance of dripper,flow and irrigation period were also determined in this paper.They were 90 cm,5...

Drip irrigation was carried out under the conditions of various flow and irrigation quantity in two kinds of soil.By measuring the shift of soil moist peak and the relation among drip irrigation flow,irrigation quantity and maximum moist diameter in the vertical and horizontal direction were established ,which can be expressed as D(H )=(a+b q)Q c.The design parameters of drip irrigation,such as interval distance of dripper,flow and irrigation period were also determined in this paper.They were 90 cm,5 L/h and 6-8 h respectively in dust clay and were 70 cm,3 L/h and 7-9 h in heavy dust loam in orchard irrigation.

在不同滴头流量和灌水量条件下对 2种不同质地土壤中的滴灌水分分布进行试验研究 ,通过对土壤湿润峰运移的测定 ,分析最大横向、纵向湿润直径与滴头流量、灌水量的关系模型 ,从而确定滴灌设计的滴头间距、流量、灌水历时等参数。结果发现 :果园滴灌中 ,粉质粘土滴水流量以 5L/h为宜 ,灌水历时 6~ 8h,滴头间距为 90 cm左右 ;重粉质壤土滴水流量以 3L/h为宜 ,灌水历时 7~ 9h,滴头间距为 70 cm左右。

Both Finite Difference Method (FDM)and Galerkin Finite Element Method(FEM)were used to solving the one-dimensional transient flow equation in unsaturated soil.Two FORTRAN77 programs were presented and used to simulate the soil moisture transfer in unsaturated soil under Warrick et al.(1971)experimental condition.The simulated results agree to Warrick results.However,the results of FEM were more closed to Warrick results than FDM ones at the wet peak in the soil profile.The results showed that both two numerical...

Both Finite Difference Method (FDM)and Galerkin Finite Element Method(FEM)were used to solving the one-dimensional transient flow equation in unsaturated soil.Two FORTRAN77 programs were presented and used to simulate the soil moisture transfer in unsaturated soil under Warrick et al.(1971)experimental condition.The simulated results agree to Warrick results.However,the results of FEM were more closed to Warrick results than FDM ones at the wet peak in the soil profile.The results showed that both two numerical method can be used to analyze and simulate soil moisture transfer in the soil.

本文分别采用有限差分法 ( FDM)和 Galerkin有限元方法 ( FEM)求解非饱和土壤水分运动基本方程 ,采用 FORTRAN77语言编制了计算程序。并将计算程序对 Warrick等试验状态下的土壤水分动态进行模拟对比 ,结果显示两程序具有较高精度 ,总体上 FEM和 FDM模拟结果均与试验值具有较好的一致性 ,但 FEM结果在湿润峰处较 FDM结果更接近试验值。表明这两种数值计算方法一般都能满足分析或预测土壤水分运动的要求

 
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