| 1. | 2 . by using the experimental device of soil moisture movement of single water storage pit and suction gauge , irrigation experiment of single water storage pit are conducted 2 .利用蓄水单坑土壤水分运动试验装置结合负压计进行蓄水单坑灌水试验。 |
| 2. | The study in this paper will provide some reference for design of technical factors of water storage pit irrigation , the conclusion will be of important value for the further study on water storage pit irrigation 本文所做的研究工作将对蓄水坑灌法技术要素的设计提供依据,研究结果对蓄水坑灌法的进一步研究具有重要的价值。 |
| 3. | In this paper , numerical simulation and experimental research on the soil moisture movement of water storage pit irrigation are conducted . at the same time , the technical parameter of water storage pit irrigation are discussed preliminarily . the research method and content include : 1 本论文对蓄水坑灌法的土壤水分运动进行了数值模拟和试验研究,并对蓄水坑灌法的技术要素进行了初步的探讨。研究的方法和内容主要有: 1 |
| 4. | The experimental device of soil moisture movement of multi water storage pit is developed , which can measure the infiltration of moisture and the movement of moisture frontal directly . distribution of soil water content in all soil section are measured with y ray apparatus . 3 利用该装置进行室内的蓄水多坑灌水试验,直接对水分的入渗过程和湿润锋变化进行观测,并通过y射线仪装置测量整个土体剖面上含水率的分布状况。 |
| 5. | In northern china , drought and soil erosion are very severe . so , it is necessary to search for a new efficient irrigation method which is suitable for water holding and drought resistance in northern china . water storage pit irrigation is a new orchard irrigation method suitable for northern hilly region 我国北方地区不仅存在干旱问题,水土流失问题也相当严重。寻求适合于北方地区保水抗旱、高效灌溉的新方法是十分必要的。 |
| 6. | It showed that the simulated value are in accordance with the experimental value by contrast of them . it indicates that the numerical modeling can reflect the status of soil moisture movement under the condition of water storage pit irrigation , and its method of solution is feasible 3 .将计算结果与实测结果进行对比,可以看出两者有较好的一致性。说明所建立的数学模型能够反映蓄水坑灌条件下的土壤水分运动状况,其数值求解方法也是可行的。 |
| 7. | Scott wood , chief archaeologist for the tonto national forest . “ record it as a feature . ” after scraping in the dirt for a while and lighting a cigar , wood leans against his cane and begins to muse : it ' s a little big to be a storage pit , about right for a granary , but there is no compressed dirt floor 他在地上刮了一会儿,又点了根菸,然后倚在手杖上,若有所思地说:这要做为储藏穴有点太大,做为谷仓就刚好,但怎麽没看见压平的泥地板? |
| 8. | Based on the fundamental theory of dynamics of soil moisture and the condition of water storage pit irrigation , numerical modeling of soil moisture movement of single water storage pit in heterogeneous soil is established . adi ( alternating direction implicit method ) and gauess - seidel iterative method are used to solve it . by using the simulated value of modeling , the relation of water injection volume and maximum horizental distance of moisture frontal are concluded . according to the relation , interval of pits are derived . then , after analyzing the infiltration characteristic of soil moisture under the condition of interference infiltration in multi storage pit , numerical modeling of soil moisture movement of multi water storage pit in heterogeneous soil is established , and its numerical solution is also acquired 利用adi (交替方向隐式差分法)结合gauess ? seidel迭代法对模型进行数值求解。利用模型的计算结果得出了单坑注水量与湿润锋最大水平推进距离之间的关系,并据此确定了坑距。在此基础上,通过对多坑干扰入渗条件下土壤水分入渗特性进行分析,太原理工大学硕士研究生学位论文建立了蓄水多坑非均质土壤水分运动数学模型,并对其进行数值求解。 |