查询词典 water and soil

Base on the field experiments in Huaibei Plain of Anhui Province, this article analyzed the feasibility of water storage in main drainage canal and effect of regulation for surface runoff, soil and groundwater, and put forward technique parameters and mode of the water storage facility.

通过在安徽淮北平原的大田原型试验，分析了利用农田排水大沟进行控制蓄水的可行性及其对地表径流、地下水和土壤水的调控效果，提出了平原区依托大沟控制蓄水的农田水资源调控系统成套技术参数和模式。

At last the breeding selection, density determination and spatial pattern are discussed and also rational density zones of some shrub and arbor breedings are suggested on base of water relationship theory and spatial characteristics of soil water utilization.

最后，结合灌木树种的水分关系和灌木对土壤水分利用的空间特征，简单地叙述了防沙治沙等生态建设工程应用水分原理选种的原则、适宜密度、确定和配置方式，并给出部分灌木树种的适宜密度区间。

For example, relation of sand soil water content and plant leaf water potential of shrub breeding or arbor breeding in the morning can be simulated using the followed exponential function:〓 or 〓, in which, coefficient value of a and b are different on different breedings or different field.

通过在毛乌素沙地、乌兰布和沙地、库布齐沙漠、巴丹吉林沙漠等近6年的测试资料的研究分析表明：①营造固沙林后，沙土中的含水率降低，降低的程度主要受到林分密度和造林后林木生长年限的影响。

In the couping solution, based on the characteristics of the models in this dissertation, each of loading step is finished in unit time. Thus the volumetric strains on the current increment step as analysis parameters are inserted into the equation of continuity and a physical equation for pore water pressure is presented. The fundamental solutions of two kinds of classic problems (axial symmetry and plane strain) are derived. By use of the fundamental solutions of pore water pressure combined with finite element method of soil mechanics, a semi-analytical and semi-numerical method for nonlinear consolidation equations is presented.

在耦合分析中，根据本文模型的特点，将每一荷载增量步看作单位时间完成，对应当前增量步的体变分量作为分析参数代入连续方程，建立了基于数值模型的孔压变化方程，根据工程中最常见的两类问题推导出基本解，结合土骨架的控制方程建立了此类液-固耦合问题的半解析半数值解答体系，编制了有限元程序，从而实现了从建立本构关系到模拟固结问题的全数值方法。

In low yield region,"life-maintaining water"should be guaranteed and otherconstruction should be enforced.3.NT altered soil surface condition for mulch cover and without tillage.NT improved availablesoil water for summer corn growth.Stronger"source and pool"and sound crop structure werebuilt in NT system.

覆盖免耕减少了土壤蒸发，具有较优越的土壤水分状况，同时增加了作物蒸腾，在一定程度上缓解了因降雨分配不均导致夏玉米需水与土壤供水的矛盾，提高了作物产量和水分利用效率。

A series combined test method tests were performed to determine the liquid-plastic limits of different samples of fine grained soil and silty sand. The result showed that the loglog relationship between the depth of penetration of fall cone and the water content of some samples were clearly not linear, and the liquid-plastic limit could not be obtained according to the linear relation. Effective test data could not be measured within the three arranges of water contents proposed by the present standards. The dependability was necessary to discuss about the liquid-plastic limit test results obtained from three arranges.

采用液、塑限联合测定法针对部分细粒土和粉砂进行液、塑限测定时，发现对于部分细粒土在双对数坐标上圆锥下沉深度与含水率之间的关系并非线性关系，无法依据线性关系确定液、塑限：采用规程建议的三个含水率范围有时根本无法获得有效试验数据；采用规程建议的三个含水率范围确定得到土的液、塑限试验结果的可靠性有待商榷；采用直线段试验数据确定的液、塑限进行分类可能出现相互矛盾甚至错误的结果。

The lower limit of water availability is thus determined by the physiology of the plant species and is known as the permanent wilting point – the soil water content at which plants wilt and are unable to recover.

因此可利用水的下限是由植物物种的生理特性所决定的，被称为永久萎蔫点——土壤水含量在这个点上，植物枯死，不能恢复。

In this paper, based on the water balance equation, infiltration parameters from advance and runoff model method was used to estimate the soil permeation parameters of Kostiakov-Lewis equation in furrow irrigation, according to a set of field furrow irrigation data to estimate the parameters, and utilizing WinSRFR1.1 software to simulate the water flow in furrow irrigation.

该文以水量平衡方程为基础，采用IPARM方法建立了沟灌Kostiakov-Lewis入渗方程中参数的估算方法，并根据一组田间实测沟灌资料对入渗参数进行了估算，利用WinSRFR1.1软件对沟灌水流运动进行了模拟。

Strength, volumetric strain and permeability coefficient, and even moisture-distribution above ground water surface can be determined by the soil-water characteristic curve.

土水特征曲线对于研究非饱和土的物理力学特性至关重要。

Effect of water saving was studied under no-tillage with straw mulch, conventional tillage with straw incorporatedand conventional tillage on bare ground. The results showed that NTS increased soil water storage by 30.6 mm and 23.9 mm over CTS and CTB during summer fallow.

对免耕覆盖、秸秆还田和常规耕作在休闲期的节水效果研究表明：在夏季休闲期，免耕覆盖比常规耕作多贮水30.62 mm，比秸秆还田多23.91 mm；在冬季储水灌溉期间，可将储水定额从2 100 m3/hm2减少到600和975 m3/hm2。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。