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| 1 | 土壤质地和灌水器材料对负压灌溉出水流量及土壤水运移的影响显示文摘负压灌溉法是一种新近提出的节水灌溉技术,灌溉时供水水头为“负值”,即灌溉水源高程低于灌水器高程。不同材料灌水器和土壤质地是影响灌溉系统出水流量及土壤水运移的重要因素。该文研究了在高程差H为-0.5 m情况下两种灌水器及两种质地土壤对两者的影响。结果表明:灌水器相同时,累计入渗量、水平和垂直最大湿润距离随时间呈幂函数关系变化;在历时相同时黏壤土较砂壤土大;湿润体近似为六分之一的竖直椭球体,但黏壤土水平与垂直最大湿润距离之比大于砂壤土。土壤质地相同时,纤维灌水器较陶土灌水器出水流量高。试验结果进一步证明了负压灌溉的可行性,并为确定负压灌溉系统应用范围及规划设计过程中灌水器选择提供了依据。 | 江培福 雷廷武 Vincent F Bralts 刘汉 | 2006 | 农业工程学报2006，22，4： | 26 |
| 2 | Methods for measuring soil infiltration:State of the art显示文摘Soil infiltration is the process by which water on the soil surface penetrates the soil.Quantifying the soil infiltration capacity(soil infiltrability)is very important for determining components of the hydrological modeling,irrigation design and many other natural or man made processes.In this paper,commonly used methods for soil infiltration rate measurement with their principles and application conditions are introduced.The advantages and disadvantages of each method under various application conditions are discussed for comparison.Three new methods for soil infiltrability measurement,including the corresponding algorithm models,and the experimental apparatus and procedures are introduced.These analyses should facilitate the choice of method used for soil infiltrability measurement. | Mao Lili V F Bralts Pan Yinghua Liu Han Lei Tingwu | 2008 | International Journal of Agricultural and Biological Engineering2008，1，1： | 2 |
| 3 | 土壤入渗性能线源测量方法的近似算法研究显示文摘土壤入渗性能的确定对于水文过程模拟,如地表产流、土壤侵蚀以及降雨向土壤水和地下水的转换等均具有十分重要的意义。本文提出了一种土壤入渗性能线源入流测量方法的快速近似算法。该方法在水量平衡原理的基础上,将各时刻的土壤入渗率在湿润地表的空间范围内进行平均,确定土壤入渗性能随时间的变化过程;所提出的新的计算模型可以简单地计算土壤入渗性能。文中利用3组土壤入渗性能线源入流测量方法得到的试验数据,将该近似算法得到的结果与之前提出的数值解法计算得到的结果进行比较,并基于水量平衡原理估计了数值方法和该近似算法的误差。结果表明,该近似算法得到的结果比数值解法得到的结果偏大,比实际供水量偏大25.3%;该近似算法的计算结果稳定,可以作为试验过程中数值计算得到的土壤入渗性能的参照值。 | 毛丽丽 雷廷武 赵军 Bralts F Vincent | 2010 | 北京林业大学学报2010，32，3： | 2 |
| 4 | Assessment of Emission Uniformity for Micro-irrigation Design显示文摘 | J. Barragan V. Bralts I.P. Wu | 2005 | Biosystems Engineering2005，，1： | 2 |
| 5 | Finite element analysis of drip irrigation submain units显示文摘 | Bralts V F Segerlind L J | 1985 | Transactions of the ASAE1985，28，3： | 1 |
| 6 | Modeling expansion/contraction, valve and booster pump in hydraulic pipe network analysis: a finite element approach显示文摘 | Haghighi K Bralts V F Mohtar R H | 1989 | Transactions of the ASAE1989，32，6： | 1 |
| 7 | A finite element model for the analysis and optimization of pipe networks显示文摘 | Mohtar R H Bralts V F Shayya W H | 1991 | Transactions of the ASAE1991，34，2： | 1 |
| 8 | Finite element formulation of tee and bend components in hydraulic pipe network analysis显示文摘 | Haghighi K Bralts V F Segerlind L J | 1988 | Transactions of the ASAE1988，31，6： | 1 |
| 9 | Assessment of emission uniformity for micro-irrigation design显示文摘 | Barragan J Bralts V Wu I P | 2006 | Biosystems Engineering2006，93，1： | 1 |
| 10 | Assessment of emission uniformity for micro-irrigation design显示文摘 | Barragn J Bralts V F Wu I P | | 0，，01： | 1 |
| 11 | Drip irrigation field uniformity estimation 显示文摘 | Bralts V F Kesner C D | 1983 | Trans ASAE1983，39，13： | 1 |
| 12 | Finite element analysis of drip irrigation submain units显示文摘 | Bralts V F Segerlind L J | 1985 | Transactions of the ASAE1985，28，3： | 1 |
| 13 | Finite element analysis of micro-irrigation hydraulics using a virtual emitter system显示文摘 | Bralts V F Kelly S F Shayya W H | 1993 | Transactions of the ASAE1993，36，3： | 1 |
| 14 | Finite element analysis of drip irrigation submain units显示文摘 | Bralts V F Segerlind L J | 1985 | Transactions of the ASAE1985，28，3： | 1 |
| 15 | Assessment of emission uniformity for micro-irrigation design显示文摘 | Barragn J Bralts V Wu I P | 2006 | Biosystems Engineering2006，93，1： | 1 |
| 16 | Manufacturing variation and drip irrigation uniformity显示文摘 | Bralts V F Wu I-pai Gitlin H M | 1981 | ASAE1981，24，1： | 1 |
| 17 | Field evaluation of drip irrigation submain units显示文摘 | Bralts V F Edwards D M | 1985 | ASAE1985，29，6： | 1 |
| 18 | Manufacturing variation and drip irrigation uniformity显示文摘 | BRALTS Vincent F I-PAI WU GITLIN Harris M | 1981 | Transactions of the ASAE1981，24，1： | 1 |
| 19 | Assessment of Emission Uniformity for Micro-irrigation Design显示文摘 | J. Barragan V. Bralts I.P. Wu | 2005 | Biosystems Engineering2005，，1： | 1 |
| 20 | Methods for measuring soil infiltration j State of the art显示文摘 | Mao L L Bralts V F Pan Y H et al | 2008 | International Journal of Agricul- ture and Biological Engineering2008，1，1： | 1 |
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